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  • 1
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-84/4
    In: CRREL Report, 84-4
    Beschreibung / Inhaltsverzeichnis: Ice problems developed in the Sault Ste. Marie, Michigan, portion of the St. Marys River because of winter navigation. Passing ships and natural influences moved ice from Soo Harbor into Little Rapids Cut in sufficient quantities to jam, cause high water in the harbor, and prevent further ship passage. After physical model and engineering studies, two ice booms with a total span of 1375 ft (419 m) with a 250-ft (76-m) navigation opening between were installed at the head of Little Rapids Cut in 1975. A modest field study program on the booms was conducted for the ensuring four winters to determine ice and boom interaction and the effects of ship passages on the system. Forces on some anchors were recorded and supplemental data were taken by local personnel. Several reports have been written about the booms' early operations. This paper presents four-year summary of the main effects of the booms on ice and ship interaction and vice versa. Throughout the four winter seasons, the small quantities of ice lost over and between the booms were manageable. Ships usually passed through the boom without influencing the boom force levels, but at time they brought about large changes. One boom needed strengthening, and artificial islands were added for upstream ice stability. Coast Guard icebreakers were also a necessary part of winter navigation in this area.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 18 Seiten , Illustrationen
    Serie: CRREL Report 84-4
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction St. Marys River Ice problems Remedial measures Field studies Highlights, trends, and major findings Modifications to boom Maximum forces Ship traffic Characteristics Effect of boom forces Effect on ice Conclusion Literature cited Appendix A: Ice boom forces
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  • 2
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-84/7
    In: CRREL Report, 84-7
    Beschreibung / Inhaltsverzeichnis: Experiments were conducted in CRREL's refrigerated flume facility to examine the two-dimensional force distribution of a floating, fragmented ice cover restrained by a boom in a simulated river channel. To determine the force distribution, a vertically walled channel, instrumented for measuring normal and tangential forces, and an instrumented restraining boom were installed in a 40.0- by 1.3-m flume. Two sizes of polyethylene blocks and two similar sizes of fresh-water ice blocks were tested using water velocities ranging from 10 to 30 cm/s. The forces measured at the instrumented boom leveled off with increasing cover length. The contribution of the increasing shear forces developed along theshorelines to this leveling off in the data was clearly evident. The shear coefficients of the polyethylene blocks averaged 0.43, and the freshwater ice averaged 0.044. The normal force measured along the instrumented shoreline could not be related simply by a K coefficient to the longitudinal force; another expression was required, with a term being a function of the cover thickness and independent of the undercover shear stress or cover length. By adding this term, good agreement was then found between the measured and predicted values of the boom forces and the shoreline normal and shear forces
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 22 Seiten , Illustrationen
    Serie: CRREL Report 84-7
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Experiments Test flume facility Experimental apparatus Experimental procedure Results Plastic versus freshwater ice Shoreline forces Boom forces Average shear stress under ice cover Internal forces Discussion Data scatter Summary and conclusions Literature cited Appendix A: Experimental results
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  • 3
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-84/33
    In: CRREL Report, 84-33
    Beschreibung / Inhaltsverzeichnis: A small-scale experimental study was conducted to characterize the magnitude and nature of ice forces during continuous crushing of ice against a rigid, vertical, cylindrical structure. The diameter of the structure was varied from 50 to 500 mm, the relative velocity from 10 to 210 mm/s, and the ice thickness from 50 to 80 mm. The ice tended to fail repetitively, with the frequency of failure termed the characteristic frequency. The characteristic frequency varied linearly with velocity and to a small extent with structure diameter. The size of the damage zone was 10 to 50% of the ice thickness, with an average value of 30%. The maximum and mean normalized ice forces were strongly dependent on the aspect ratio (structure diameter/ice thickness). The forces increased significantly with decreasing aspect ratio, but were constant for large aspect ratios. The maximum normalized forces appeared to be independent of strain rate. The effect of velocity on the normalized ice forces depended on structure diameter. The mean effective pressure or specific energy of ice crushing depended on both aspect ratio and ice-structure relative velocity. The energy required to crush the ice for the one failure cycle was obtained from the ice force records for each test, and was compared to the energy calculated from an idealized sawtooth shape for the force record, the maximum force, velocity and characteristic frequency data. Originator - supplied keywords included: Cold regions, Cold regions construction, Cylindrical test structures, Ice, Ice crushing, Ice forces, and Test facilities.
    Materialart: Schriftenreihen ausleihbar
    Seiten: vi, 47 Seiten , Illustrationen
    Serie: CRREL Report 84-33
    Sprache: Englisch
    Anmerkung: Contents Abstract Preface Nomenclature Introduction Test objectives Experimental setup and procedures Facilities Test fixture Data acquisiton system Ice sheets Measurement of ice properties Daily test summary Experimental results and discussion Observations Ice force records Frequency of ice force variations Discussion Maximum crushing forces Mean effective pressure or specific energy of ice in crushing Failure energy of ice Ratio of maximum force to mean force Summary and conclusions Literature cited Appendix A: Data for continuous crushing tests
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  • 4
    Monographie ausleihbar
    Monographie ausleihbar
    Copenhagen : [s.n.]
    Signatur: AWI G7-19-92074
    Materialart: Monographie ausleihbar
    Seiten: 68 Seiten , Illustrationen
    Sprache: Englisch
    Anmerkung: CONTENTS: Flight plan 1998. - C130 schedule. - NGRIP 1998 schedule. - Overview of 1998 schedule. - Camp setup. - Quartering and buildings. - Number of field participants. - NGRIP 1998 sub programs. - SITREP. - Term of reference for the NG RIP field work. - Accidents and illness. - Mail to NGRIP participants. - Cargo shipments to Greenland. - Personnel transport 1998. - Booze and drugs. - Vacation in Greenland. - Shipping boxes. - Welcome to the NGRIP camp. - List of participants. - NGRIP camp load. - Kangerlussuaq and the surrounding area. - Thule Air Base, Greenland, Base Operations. - Other useful information for Thule passengers. - Uplift 1998. - Typical specifications for LC-130 and Twin Otter. - Useful data. - Coordination of C-130 in Kangerlussuaq. - Aviation weather reports. - Typical communication plan. - Summary of frequencies used in Greenland. - Phonetic alphabet. - Personal field equipment. - Operation of NERA lnmarsat M terminal. - Map of NGRIP camp. - NGRIP trenches. - Map of NGRIP area. - Map of Greenland. - Map of the ice divide north of GRIP. - Map of the magnetic declination in Greenland. - Density vs temperature of hole liquid. - Surface measurements near NGRIP. - Positions in Greenland. - Relevant distances and directions. - List of NGRIP addresses.
    Standort: AWI Lesesaal
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  • 5
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Boulder, Colo. : University Corp. for Atmospheric Research
    Signatur: AWI A1-19-92163
    Beschreibung / Inhaltsverzeichnis: "Our changing climate is the fourth in a series of publication on climate and global change intended for public education. The documents are a collaborative effort of the UCAR Joint Office for Science Support and NOAA Office of Global Programs, for the purpose of raising the level of public awareness of issues dealing with global environmental change."
    Materialart: Schriftenreihen ausleihbar
    Seiten: 24 Seiten , Illustrationen , 28 cm
    Serie: Reports to the nation on our changing planet 4
    Sprache: Englisch
    Anmerkung: Table of Contents: Climate and American People. - Earth's climate: A dynamic system. - Why does earth's climate change?. - Can we change the climate?. - The Greenhouse Effect. - Why are Greenhouse gas amounts increasing?. - Aerosols: Sunscreen for the planet?. - How has climate changed in the past century?. - Can we predict climate change?. - What do climate models tell us about our future?. - Where do we go from here?
    Standort: AWI Lesesaal
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  • 6
    Monographie ausleihbar
    Monographie ausleihbar
    Hamburg : Max-Planck-Institut für Meteorologie
    Signatur: AWI A3-19-92156
    Materialart: Monographie ausleihbar
    Seiten: 73 Seiten
    Sprache: Englisch
    Anmerkung: CONTENTS: Foreword / Klaus Hasselmann. - GROUP HASSELMANN. - Improving the SIAM Economy Module / Volker Barth. - A Nonlinear Impulse Response Model of the Coupled Carbon Cycle-Ocean-Atmosphere Climate System / Georg Hooß. - Potential Impact of Uncertainty and Natural Climate Variability in the Design of Optimal Climate Protection Policies / Victor Ocaña. - Climate Change Detection for the Annual Cycle of Temperature and Precipitation / Reiner Schnur. - Estimating the Sensitivity of a Regional Atmospheric Model to a Sea State Dependent Roughness Using Ensemble Calculations / Ralph Weisse, Hauke Heyen, and Hans von Storch. - CLIMATE MODEL AND DATA SECTION DKRZ. - Modellbetreuungsgruppe - An Update / Ulrich Cubasch. - Prediction of Global Change Using Different Models: An Intercomparison / Ulrich Cubasch. - The ECHO-G Coupled Climate Model on the NEC SX-4 / Stephanie Legutke. - Data Group Activities and Status / Hans Luthardt. - GROUP GRAF. - The Possible Effect of Biomass Burning on Local Precipitation and Global Climate / Hans-F. Graf. - The Leading Variability Mode of the Coupled Troposphere-Stratosphere Winter Circulation in Different Climate Regimes / Judith Perlwitz. - Numerical Simulation of Scavenging Processes in Explosive Volcanic Eruption Clouds / Christiane Textor. - Three-dimensional Simulation of Stratospheric Aerosol / Claudia Timmreck. - GROUP LATIF. - Oceanic Control of Decadal North Atlantic Sea Level Pressure Variability in Winter / Mojib Latif, Klaus Arpe, and Erich Roeckner. - Climatology and Variability in the Tropical Pacific in the Coupled GCM ECHO-G / Astrid Baquero. - Large-scale Air-sea Interactions in the Midlatitudes / Dietmar Dommenget. - ENSO Prediction Experiments with the Coupled GCM ECHO-G / Anselm Grötzner, Mojib Latif, and Stephan Venzke. - Simulating the Response of an Ocean General Circulation Model to North Atlantic Oscillation-type Forcing / Helmuth Haak. - The Role of Indian Ocean Sea Surface Temperature in Forcing East African Climate Anomalies / Mojib Latif, Dietmar Dommenget, and Mihai Dima. - A Circulation Model for Paleoclimate Studies: Model Description and First Applications / Gerrit Lohmann. - Southern Ocean Investigations with the HOPE Model / Simon J. Marsland. - The Atmospheric Response to SST Anomalies in Midlatitudes / Ute Merkel. - Equatorial Pacific Thermocline Circulation and Decadal Climate Variability / Keith Rodgers. - Ocean Model Intercomparison Project / Frank Röske. - Assimilation of Topex/Poseidon Altimeter Data into an Ocean GCM to Improve ENSO Forecasts / Sigrid Schöttle. - GROUP MIKOLAJEWICZ. - Development of the new C-HOPE OGCM / Uwe Mikolajewicz. - The Atlantic Thermohaline Circulation: Large Scale and Small Scale Aspects / Johann Jungclaus. - The Global Ocean Assimilation System GOAS / Detlev Müller. - Study of the Climate Variability in the Northern European and Arctic Seas Using Coupled Ocean-Atmosphere Models / Dmitry Sein. - GROUP MAIER-REIMER. - Modeling of Marine Biogeochemistry / Ernst Maier-Reimer. - (1) Optimisation of a Marine Silicon Cycle Model and (2) Artificial Sediment Cores / Christoph Heinze. - Modeling Stable Water Isotopes and Vapor Source Regions over Greenland and Antarctica / Martin Werner. - OTHERS. - Ongoing Work in the Bengtsson Department / Marco Giorgetta. - E-journals and Databases for MPG Scientists: How to's / Carola Kauhs. - INDEX OF AUTHORS. -
    Standort: AWI Lesesaal
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  • 7
    Signatur: ZSP-SCAR-570-6
    In: Antarctic Research Report to SCAR, No. 6
    Materialart: Schriftenreihen ausleihbar
    Seiten: 38 Seiten
    ISSN: 0179-0072
    Serie: National Antarctic Research Report to SCAR 6
    Sprache: Englisch
    Anmerkung: Contents: Membership of the National Committee on Antarctic Research in the Federal Republic of Germany. - Introduction. - Stations. - I. Record of Activities (past and ongoing), April 83-October 84. - II. Planned Activities, October 84-October 85. - References.
    Standort: AWI Archiv
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  • 8
    Signatur: ZSP-SCAR-570-3
    In: National Antarctic Research Report to SCAR, No. 3
    Materialart: Schriftenreihen ausleihbar
    Seiten: 16 Seiten
    ISSN: 0179-0072
    Serie: National Antarctic Research Report to SCAR 3
    Sprache: Englisch
    Anmerkung: Contents: Membership of the National Committee on Antarctic Research in the Federal Republic of Germany. - Introduction. - Stations. - I. Record of Activities (past and ongoing), April 80-October 81. - II. Planned Activities, October 81-October 82. - References.
    Standort: AWI Archiv
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  • 9
    Monographie ausleihbar
    Monographie ausleihbar
    Copenhagen : [s.n.]
    Signatur: AWI G7-19-92129
    Materialart: Monographie ausleihbar
    Seiten: 62 Seiten , Illustrationen
    Ausgabe: Draft
    Sprache: Englisch
    Anmerkung: CONTENTS: Flight plan 1996. - C130 schedule. - NGRIP 1996 Schedule. - Overview of 1996 schedule. - Camp Layout. - Buildings. - Number of field participants. - NGRIP 1996 Sub programs. - CARDS Radar test. - KMS Elevation measurements. - SITREP. - Terms of Reference during the field operation. - Accidents and Illness. - Mail to NGRIP participants. - Cargo shipments to Greenland. - Personnel transport 1996. - Booze and drugs. - Vacation in Greenland. - Shipping boxes. - Welcome to the NGRIP camp. - List of participants. - NGRIP camp load. - Kangerlussuaq and Surrounding Area. - Thule Air Base, Greenland, Base Operations. - Other useful information for Thule passengers. - Uplift 1996. - Typical specs for LC-130 and Twin Otter. - Useful data. - Coordination of C-130 in Kangerlussuaq. - Aviation weather reports. - Typical communication plan. - Summary of frequencies used in Greenland. - Phonetic alphabet. - Personal field equipment. - Map of GRIP camp. - NGRIP, Maps of one and two line set up. - NGRIP trenches. - Map of Greenland. - Map of north Greenland. - Map of ice divide north of GRIP. - Map of magnetic declination in Greenland. - Positions in Greenland. - Relevant distances and directions. - 1996 Twin Otter hours. - List of NGRIP addresses.
    Standort: AWI Lesesaal
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  • 10
    Monographie ausleihbar
    Monographie ausleihbar
    Copenhagen : [s.n.]
    Signatur: AWI G7-19-92076
    Materialart: Monographie ausleihbar
    Seiten: 67 Seiten , Illustrationen
    Sprache: Englisch
    Anmerkung: CONTENTS: Flight plan 1997. - C130 schedule. - NGRIP 1997 schedule. - Overview of 1997 schedule. - Camp layout. - Quartering and buildings. - Number of field participants. - NGRIP 1997 sub programs. - CARDS Radar test. - KMS elevation measurements. - SITREP. - Terms of reference during the field operation. - Accidents and illness. - Mail to NGRIP participants. - Cargo shipments to Greenland. - Personnel transport 1997. - Booze and drugs. - Vacation in Greenland. - Shipping boxes. - Welcome to the NGRIP camp. - List of participants. - NGRIP camp load. - Kangerlussuaq and the surrounding area. - Thule Air Base, Greenland, Base Operations. - Other useful information for Thule passengers. - Uplift 1997. - Typical specifications for LC-130 and Twin Otter. - Useful data. - Coordination of C-130 in Kangerlussuaq. - Aviation weather reports. - Typical communication plan. - Summary of frequencies used in Greenland. - Phonetic alphabet. - Personal field equipment. - Map of NGRIP camp. - NGRIP, Central Camp. - NGRIP trenches. - Map of NGRIP area. - Map of Greenland. - Map of the ice divide north of GRIP. - Map of the magnetic declination in Greenland. - Positions in Greenland. - Relevant distances and directions. - 1997 Twin Otter hours. - List of NGRIP addresses.
    Standort: AWI Lesesaal
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  • 11
    Monographie ausleihbar
    Monographie ausleihbar
    München : Institut für Allgemeine und Angewandte Geophysik der Ludwig-Maximilians-Universität
    Signatur: AWI G5-18-92079
    Materialart: Monographie ausleihbar
    Seiten: 99 Seiten , Illustrationen
    Sprache: Deutsch
    Anmerkung: Diplomarbeit, Ludwig-Maximilians-Universität München, 1998 , Inhaltsverzeichnis: 1 Einführung. - 1.1 Eiskerne - ein Paläoklimaarchiv. - 1.1.1 Datierung der Eiskerne. - 1.1.2 Verschiedene Eiskernbohrungen. - 1.2 Zielsetzung der Arbeit. - 2 Eigenschaften von Eis. - 2.1 Physikalische Eigenschaften. - 2.1.1 Kristallstruktur von Eis Ih. - 2.1.2 Das Wassermolekül. - 2.2 Chemische Eigenschaften von polarem Eis. - 2.2.1 Isotopenverhältnisse. - 2.2.2 Gaseinschlüsse und Spurenstoffe im Eis. - 3 Elektrische Eigenschaften von Eis. - 3.1 Das Jaccard Modell. - 3.1.1 Ladungsträger im Eis. - 3.1.2 Defekte im Eiskristall. - 3.2 Frequenzabhängigkeiten. - 3.2.1 Elektrische Parameter. - 3.2.2 Meßtechnische Effekte. - 3.3 Messungen an polaren Eiskernen. - 3.3.1 Meßmethoden für die elektrischen Leitfähigkeiten. - 3.3.2 Reproduzierbarkeit von Gleichstrom-Messungen. - 4 Aufbau einer Vierpunkt-Meßbank. - 4.1 Meßmethode. - 4.2 Eiskernanalysebänke. - 4.2.1 Am AWI vorhandene Analysebänke. - 4.2.2 Vierpunkt-Meßbank. - 4.3 Meßgeräte. - 4.3.1 Gleichspannungsmessung. - 4.3.2 Wechselspannungsmessung. - 4.4 Meßdatenerfassung. - 4.4.1 Beschreibung des Meßprogramms. - 4.4.2 Das verwendete Betriebsystems- Linux. - 5 Ergebnisse. - 5.1 Ermittlung des Geometriefaktors. - 5.2 Messung mit Gleichspannung. - 5.2.1 Standard Meßgeräte. - 5.2.2 Ergebnisse. - 5.3 Messung mit niederfrequenter Wechselspannung. - 5.3.1 Ergebnisse. - 5.3.2 Standard-Meßgeräte. - 5.3.3 Messung mit Geoelektrik-Vierpunktapparatur. - 5.3.4 Verbesserungsvorschläge. - 6 Zusammenfassung. - Danksagung.
    Standort: AWI Lesesaal
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  • 12
    Monographie ausleihbar
    Monographie ausleihbar
    [Erscheinungsort nicht ermittelbar] : [Verlag nicht ermittelbar]
    Signatur: AWI P4-19-92238
    Materialart: Monographie ausleihbar
    Seiten: 16 Seiten , Illustrationen
    Sprache: Englisch
    Standort: AWI Lesesaal
    Zweigbibliothek: AWI Bibliothek
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  • 13
    Monographie ausleihbar
    Monographie ausleihbar
    [Erscheinungsort nicht ermittelbar] : [Verlag nicht ermittelbar]
    Signatur: AWI G7-19-92324
    Materialart: Monographie ausleihbar
    Seiten: 23 Seiten , Illustrationen
    Sprache: Englisch
    Anmerkung: Contents: 1. Personnel at DC. - 2. Summary timetable of events for EPICA personnel. - 3. Transport to/from DC for EPICA personnel. - 4. Building period. - 5. Scientific activity - equipment layout. - 6. Science processing line. - 7. Results from this season. - 8. General comments on communications, logistics and general status of the camp. - 9. Tasks that EPICA personnel need to do next season. - 10. Recommendations for 1998/99. - 11. Acknowledgements.
    Standort: AWI Lesesaal
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  • 14
    Signatur: ZSP-SCAR-570-4
    In: National Antarctic Research Report to SCAR, No. 4
    Materialart: Schriftenreihen ausleihbar
    Seiten: 24 Seiten
    ISSN: 0179-0072
    Serie: National Antarctic Research Report to SCAR 4
    Sprache: Englisch
    Anmerkung: Contents: Membership of the National Committee on Antarctic Research in the Federal Republic of Germany. - Introduction. - Stations. - I. Record of Activities (past and ongoing), April 81-October 82. - II. Planned Activities, October 82-October 83. - References.
    Standort: AWI Archiv
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  • 15
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-95/14
    In: CRREL Report, 95-14
    Beschreibung / Inhaltsverzeichnis: Current protocols for decontaminating devices used to sample groundwater for organic contaminants are re­viewed. Most of the methods given by regulatory agencies provide little scientific evidence that justify the recommended protocols. In addition, only a few studies that actually compared various decontamination proto­cols could be found in the open literature, and those studies were limited in their scope. Various approaches for decontamination and criteria that are important in determining how effectively a surface could be decontami­nated are discussed.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iii, 15 Seiten , Illustrationen
    Serie: CRREL Report 95-14
    Sprache: Englisch
    Anmerkung: CONTENTS Preface Introduction Sorption and desorption of organic contaminants Decontamination methods Aqueous cleaning methods Cleaning or rinsing with organic solvents Chemical neutralization methods Current protocols to decontaminate groundwater sampling devices Variations in methodology Special instructions for cleaning pumps Effectiveness of various decontamination methods Low-temperature considerations Conclusions Literature cited
    Standort: AWI Archiv
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  • 16
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-82/43
    In: CRREL Report, 82-43
    Beschreibung / Inhaltsverzeichnis: The radar signatures of ice wedges and wedge-like structures have been investigated for a variety of soil conditions. The radar used for this study emitted short sinusoidal pulses of about 10-ns duration with an approximate center frequency of 150 MHz. Most of the ice wedges existed at depths of about 1 m in a variety of silty and sandy soils with both frozen and thawed active layers. The position of the wedges was usually identified from corresponding surface features. An artificial ice wedge in coarse-grained alluvium was also profiled as well as wedge-like structures of fine silt in a coarse-grained glacial outwash. All wedges and wedge-like structures produced a hyperbolic reflection profile except when an active layer of thawed, saturated silt was present which eliminated returns from the wedges. The peaks of the hyper-bolas were sometimes masked by reflections from the permafrost table or other material interfaces, and multiple hyperbolas occurred at some sites. The dielectric constant of the host medium was often calculated from the linear portions of the hyperbolas and the results were verified by laboratory time domain reflectometry measurements per-formed on field samples. In some cases, hyperbolic profiles originated at several meters depth suggesting that deep ice wedges could be detected in areas of cold permafrost.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 19 Seiten , Illustrationen
    Serie: CRREL Report 82-43
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Background Objectives and procedures Equipment used Radar TDR Definitions Massive ice Results Artificial wedge: Norwich, Vermont Ice wedges in sand: Fish Creek, Alaska Ice wedges: Prudhoe Bay, Alaska Ice wedges under thawed fine-grained soils: North Slope, Alaska Wedge-like soil structures: Ft. Greely, Alaska TDR measurements Summary and concluding remarks Literature cited Appendix A: Brief discussion of dispersion
    Standort: AWI Archiv
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  • 17
    Signatur: AWI G1-19-92510
    Materialart: Monographie ausleihbar
    Seiten: 592 Seiten , Illustrationen
    ISBN: 84-920268-6-3
    Sprache: Spanisch , Englisch
    Anmerkung: ÍNDICE PRÓLOGO INTRODUCCIÓN El estudio científico de las cavidades kársticas y las Ciencias Geológicas. Una buena alianza / J.J. Durán. KARST, TECTÓNICA Y SISMICIDAD Evidencias tectónicas y sísmicas a partir del estudio de espeleotemas: conocimiento actual y desarrollo futuro / P. Forti Evolución tectosedimentaria del entorno de la Cueva de Nerja durante el Plio-Cuatemario. / A. Guerra-Merchán, D. Ramallo y F. Serrano Análisis de la fracturación reciente en los espelotemas de la Cueva de Nerja, Málaga. / P. Gumiel, J.J. Durán, J. López-Martínez, J.M. González-Casado, B. Andreo y F. Carrasco La fracturación en la Cueva de los Enebralejos, Segovia, borde norte del Sistema Central. / J. Barea, J.J. Durán, J. Giner, J.M. González-Casado y J. López-Martínez Control estructural de la cavidad kárstica "La Cuevona" (Ribadesella, Asturias) / J. L. Alonso, J. G. García-Ramos y M. Gutiérrez-Claverol El karst de la Alquería (Vélez-Rubio, Almería) / A. González y J.A. Martínez The influence of tectonics on karstification of Permian-Carboniferous limestone from westem Serbia. / P. Pavlovic and D. Stojiljkovic Estudio preliminar de la Cueva de Castelar (Ciudad Real). El ejemplo español de karst en rocas cristalinas / C. J. Gavilán, l. Alonso y J.J. Durán REGISTROS SEDIMENTARIOS KÁRSTICOS Y RECONSTRUCCIONES PALEOAMBIENTALES Endokarstic sedimentary records and paleo-environmental reconstructions in caves / D. C. Ford Speleothem records of environmental changes and the past-bases and potential. / Y. Y. Shopov, L. Tsankov, L. N Georgiev, C.J Yonge, H.P.R. Krouse and A.J.T. Jull Significance of Luminescent spelothem records for determination of orbital variations, glaciations and timing of termination-II. / Y.Y. Shopov, D. Stoykova, M. Sanambria, L. Tsankov, D. Ford, L. Georgiev and D. Georgieva Dataciones isotópicas de espeleotemas procedentes de cuevas costeras de Mallorca. Estado actual de las investigaciones / A. Ginés, J. Ginés, J.J. Fornós y P. Tuccimei Estudio isotópico sobre las condiciones de precipitación de "calcitas flotantes" actuales procedentes de tres cuevas en la isla de Mallorca / C. Jiménez de Cisneros y E. Caballero Geoquimica de travertinos procedentes de una fuente termal. Estimaciones sobre su velocidad de formación. / E. Caballero, C. Jiménez de Cisneros y C. Jiménez Travertinos asociados a los manantiales del borde occidental de la Sierra de la Alfaguara (Granada, Sur de España) / B. Andreo, M. Martín-Martín, A. Martín-Algarra y R. Julia Espeleotemas y morfogénesis exokárstica. El ejemplo de la Sierra del Endrinal (Grazalema, Cádiz) / J Rodríguez Vidal, G. Alvarez, L. M. Cáceres, A. Martínez Aguirre y J. M. Alcaraz La evolución de los materiales de acumulación en el Altiplano carbonatado de Cantanhede (NO de Coimbra-Portugal) / A. De Marco y L. A. Dimuccio Cave genesis in karst regions of Balkan Península / D. Vasileva Skocjanske Jame, Slovenia: development of caves related to rock characteristics and rock relief / M. Knez and T. Slabe Facies mineralógicas de las arenas de los rellenos kársticos de la Sierra de Atapuerca (Burgos) / T. Aleixandre y A. Pérez González Mineralogy of cave deposits from Bihor Mountains (Romanía) / L. Ghergari and T. Tamas Análisis polínico de sedimentos en cavidades kársticas: hacia un nuevo desarrollo conceptual / J. S. Carrión, C. Navarro y M. Munuera El karst de la Espluga de Francolí: características fisicas e hidrogeológicas. Interés en la educación ambiental / J M Cervelló, M Monterde, J Ramoneda y A. Freixes Análisis sistemático y ecológico de los roedores del Pleistoceno Superior procedentes de la Cueva de las Ventanas (Granada, España) / A. Ruiz-Bustos y J A. Riquelme Cantal Geology, geomorphology, tectonics and geological map ofthe Cave of Riomurtas (Narcao, Southwest Sardinia). J De Waele and A. Muntoni CONSERVACIÓN DE CAVIDADES: EL IMPACTO ANTRÓPICO La dynamique du milieu souterrain, concepts de base servant a la conservation des grottes / A. Mangin, D. D 'Hulst et F. Bourges L' eclairage et la protection des grottes / F. Bourges, A. Mangin et D. D'Hulst Análisis de las concentraciones de 222Rn del aire de la Cueva de Nerja / C. Dueñas, M.C. Fernández, J Carretero, E. Liger y S. Cañete El medio ambiente subterráneo de la Cueva de Nerja (Málaga). Modificaciones antrópicas / F. Carrasco, B. Andreo, I Vadillo, J.J. Durán y C. Liñán EL AGUA Y EL KARST Recharge and behaviour of karst aquifers. Examples from Southeastem France / J Mudry, Y. Guglielmi, A. Chalumeau, A. Reynaud and Y. Paquette ¿Pueden las teorías sobre el desarrollo del karst contribuir al mejor conocimiento de la moderna hidrogeología del karst? / J Silar Behaviour of the epikarst aquifer: signal analysis and flow analysis. Si te of Lascaux Cave. / R. Lastennet, A. Denis, Ph. Malaurent and J Vouvé Primeros datos sobre la variabilidad estacional de la infiltración en la Cueva del Agua (lznalloz, Granada) / F. Sánchez-Martos, J. M Calaforra y M J González-Ríos Primeros resultados sobre la caracterización hidroquímica y evolución espacial de las aguas del sistema kárstico de Valporquero, Cordillera Cantábrica / JJ Durán, M Vallejo, l. Herráez y J López-Martínez Hidrodinámica e hidroquímica de las aguas de goteo de la Cueva de Nerja / C. Liñán, B. Andreo, F Carrasco e l. Vadillo Modelización de los procesos hidrogeoquímicos que afectan al agua de goteo de la Cueva de Nerja / J. Cardenal, J. Benavente, B. Andreo y F. Carrasco Algunos procesos hidrogeoquímicos en la Cueva de Canalobre y en el acuífero del Cabeçó D'Or (Alicante) / J. M Andreu, J.C. Cerón, A. Pulido-Bosch y A. Estévez Tracing technique as a contribution to karstology: past experience, new directions / Ph. Meus and C. Ek Ensayos de trazadores en acuíferos kársticos: desarrollo histórico y anecdotario / J. G. Yélamos Trazados en la Unidad Hidrogeológica Izarraitz (País Vasco): consideraciones sobre la complejidad estructural y dinámica del medio kárstico / l. Mugerza, T. Morales, l. Antigüedad, J.A. Uriarte, l. Fernández de Valderrama, J.M Gonzalo y P. Bezares d18O and average recharge-altitude relationships in karstic springs / Th. Herold, S.M. Bernasconi, P. Jordan and F. Zwahlen Concentración inicial de radiocarbono en agua subterránea del karst de Bohemia central / J. Silar y K. Záhrubsky Los sistemas kársticos del Parque Natural del Cadí-Moixeró (Pirineo oriental, Catalunya) / J. Ramoneda, A. Freixes, M. Monterde, J. P. Morin y L. Gourcy Hidroquímica de la Sierra de Guara / J. A. Cuchí, J.A. Manso, M. Subías y J. Buera Nuevas aportaciones sobre el funcionamiento hidrogeológico del acuífero kárstico multicapa del Calar del Mundo (Provincias de Albacete y Jaén) / T. Rodríguez-Estrella Posible contribución del karst de Los Berros (Argentina) para el abastecimiento a la industria de la región / C. Wetten y O.A. Damiani Karst groundwater quality in Austria / M. Kralik Modelo numérico del flujo subterráneo de un acuífero kárstico en Yucatán, México. Implicaciones hidrogeológicas / R. González, l. Sánchez y J. Gamboa Aprovechamiento de manantiales kársticos de carácter intermitente mediante operaciones de recarga artificial de acuíferos. Las Ufanes de Gabellí (Mallorca) / J. M Murillo, C.J. Gavilán, J.A. de la Orden The karstic aquifer ofthe Izhora Plateau (Russia) and problems ofits use under anthropogenic pressure / A. N Voronov, NA. Vinograd and A.A. Shvarts Aspects of groundwater vulnerability mapping in karst regions with the help of GIS / P.S. Bezrukov Natural and anthropogenic influences as threats to pits in the Debeli Namet Glacier (Durmitor National Park, Montenegro) / P. Djurovic Carbon inorganic total dissolved origine, repartition and it's karstification impact / C. Emblanch, H. Celle, B. Blavoux and J. M. Puig , Beiträge teilweise in spanischer, teilweise in englischer Sprache
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  • 18
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-83/11
    In: CRREL Report, 83-11
    Beschreibung / Inhaltsverzeichnis: Investigations of ground radar performance over thawed and seasonally frozen silts, and sands and gravels containing artificial and natural reflectors were carried out in Alaska. The radar emitted 5-10 ns pulses, the center frequency of which was approximately 150 MHz. The artificial reflectors were metal sheets and discs and the natural reflectors were the groundwater table and interfaces between frozen and thawed material. The water table was profiled at three sites where the subsurface material was coarse-grained alluvium. Dielectric constants of 16 to 18 were measured for the thawed silts, 6 to 7 for the frozen silts and 3 to 9 for the sands and gravels. Signal penetration in the thawed high moisture content silts may be achieved only by use of a lower frequency radar, whereas in the sands and gravels greater depths may be detected with more sophisticated signal processing.
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    Seiten: 16 Seiten , Illustrationen
    Serie: CRREL Report 83-11
    Sprache: Englisch
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  • 19
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-83/17
    In: CRREL Report, 83-17
    Beschreibung / Inhaltsverzeichnis: A sea ice model was applied to the East Greenland Sea to examine a 60-day ice advance period beginning 1 October 1979. This investigation compares model results using driving geostrophic wind fields derived from three sources. Winds calculated from sea-level pressures obtained from the National Weather Service's operational analysis system resulted in strong velocities concentrated in a narrow band adjacent to the Greenland coast, with moderate velocities elsewhere. The model showed excessive ice transport and thickness build-ups in the coastal region. The extreme pressure gradient parallel to the coast resulted partially from a pressure reduction procedure that was applied to the terrain-following sigma coordinate system to obtain sea-level pressures. Additional sea-level pressure fields were obtained from an independent optimal interpolation analysis that merged FGGE buoys drifting in the Arctic basin with high latitude land stations and from manual digitization of the NWS hand-analyzed Northern Hemisphere Surface Charts. Modeling results using winds from both of these fields agreed favorably.
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    Seiten: 19 Seiten , Illustrationen
    Serie: CRREL Report 83-17
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Description of study Model results The problem Conclusions Literature cited
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  • 20
    Signatur: ZSP-201-83/24
    In: CRREL Report, 83-24
    Beschreibung / Inhaltsverzeichnis: Secondary recovery of oil at Prudhoe Bay, Alaska, will involve transporting large quantities of seawater in elevated pipelines across tundra for injection into oil-bearing rock strata. The possibility of a pipeline rupture raises questions concerning the effects of seawater on tundra vegetation and soils. To evaluate the relative sensitivities of different plant communities to seawater, eight sites representing the range of vegetation types along the pipeline route were treated with single, saturating applications of seawater during the summer of 1980. Within a month of the treatment 30 of 37 taxa of shrubs and forbs in the experimental plots developed clear symptoms of stress, while none of the 14 graminoid taxa showed apparent adverse affects. Live vascular plant cover was thus reduced by 89 and 91% in the two dry sites and by 54, 74 and 83% in the three moist sites, respectively. Live(green) bryophyte cover was markedly reduced in the moist experimental sites in 1981. Bryophytes in all but one of the wet-site experimental plots were apparently unaffected by the seawater treatment. Two species of foliose lichens treated with seawater showed marked deterioration in 1981. All other lichen taxa were apparently unaffected by the seawater treatment. The absorption and retention of salts by the soil is inversely related to the soil moisture regime. In the wet sites, conductivities approached prespill levels within about 30 days. In such sites, spills at the experimental volumes are quickly diluted and the salts flushed from the soil. In the dry sites, on the other hand, salts are retained in the soil, apparently concentrating at or near the seasonal thaw line.
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    Seiten: 43 Seiten , Illustrationen
    Serie: CRREL Report 83-24
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Methods Site selection and preparation Prespill assessment Seawater application Postspill assessment Enzyme assay and analysis of soil flora Results and discussion Soil-solution conductivities Vascular plant response Cryptogam response Site factors and plant response Soil flora and extracellular soil enzymes Limitations of this study Summary and conclusions Literature cited Appendix: Plant taxa included in this study
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  • 21
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-83/29
    In: CRREL Report, 83-29
    Beschreibung / Inhaltsverzeichnis: A literature review indicated that the effects or permafrost on streambank erodibility and stability are not yet understood because systematic and quantitative measurements are seriously lacking. Consequently, general controversy exists as to whether perennially frozen ground inhibits lateral erosion and bankline recession, or whether it increases bank recession rates. Perennially frozen streambanks erode because of modification of the bank's thermal regime by exposure to air and water, and because of various erosional processes. Factors that determine rates and locations of erosion include physical, thermal and structural properties of bank sediments, stream hydraulics and climate. Thermal and physical modification of streambanks may also induce accelerated erosion within permafrost terrain removed from the immediate river environment. Bankline or bluffline recession rates are highly variable, ranging from less than 1 m/year to over 30 m/year and, exceptionally, to over 60 m/year. Long-term observations of the physical and thermal erosion processes and systematic ground surveys and measurements of bankline-bluffline recession rates are needed.
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    Seiten: iv, 26 Seiten , Illustrationen
    Serie: CRREL Report 83-29
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Stream bank erosional processes Permafrost and related factors Permafrost and erosion General Erosional processes Bank zone processes Bluff zone processes Factors affecting perm afrost erodibility Exposure to currents and wind waves Texture and stratigraphy Ice content, distribution and type Slope aspect Coriolis force Timing and depth of thaw Water level and temperature Vegetation Ice and snow cover Groundwater Rates and timing of erosion and recession Overall effects of permafrost Recommendations for research Literature cited Appendix A : Processes of stream bank modifications
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  • 22
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-84/32
    In: CRREL Report, 84-32
    Beschreibung / Inhaltsverzeichnis: Orwell Lake, in west-central Minnesota, is a flood-control, water-management reservoir first impounded in 1953. Subsequent erosion of the shoreline and a lack of knowledge of slope erosion processes in this region prompted this study to identify and quantify the processes there. The processes were measured at selected sites between June 1980 and June 1983. Erosion of the banks is primarily caused by three processes: rain, frost thaw, and waves. The first two processes tend to move sediment to the base of the steep slopes, forming 4 relatively gentle surface of accumulation. Wave action then tends to move this sediment into the lake. Analysis of the data collected over three years has confirmed that wave action is the dominant erosion process, providing almost 77% of the erosion during the 1981-82 study year. During the 1981 high pool level, 2,089 Mg of sediment, mostly colluvium, was removed from the lower slopes by wave action striking the 1.62 km of eroding shoreline. More than 4,300 Mg was eroded by waves accompanying the higher pool levels of 1982., During years in which the pool level does not exceed 325.5 m in elevation, the colluvium slope builds up at the expense of the steeper slope. But during successive years with higher pool levels, the resulting thin colluvium is quickly eroded. Erosion of the primary sediment, a compact till, then occurs, forming the S typical nearly vertical banks. In winter the upland surface adjacent to the lake freezes to a depth of between 1 and 2 m, depending on the surface temperature, the mow cover, and the distance from exposed banks. In late winter soil aggregates, released by the sublimation of interstitial ice within the banks, begin to accumulate at the base of the slopes, often veneering snowbanks there. Once thaw begins, slab failure of bank sediment is followed by mudflows and earthflows. Thaw failure at Orwell Lake in the winter of 1981-82 accounted for over 20% of the erosion; in the spring of 1982, 824 Mg was eroded by this process and 746 Mg the following spring. Such slope failure is most intense along north-facing banks and considerably less intense on south-facing banks, where more effective desiccation and sublimation reduce the soil moisture content. Summer rainfall is responsible for the remaining 3% of the total erosion, amounting to 102 Mg in 1981 and 208 Mg in 1982. Because the banks are steep and relatively short, rainwash is infrequent; rainsplash is the most consistent process during the summer, but the infrequent storms during which rainwash occurscause greater total erosion. Erosion by rain has increased in each of the past three summers, largely because of increased precipitation. Infrequent massive slope failures (slumps) have occurred at the east end of the lake where a buried clay rich unit is stratigraphically and topographically positioned to favor such failures. Drought years followed by heavy spring rains probably will result in additional slope failures of this type at the east end. Unless changes are made, the banks at Orwell Lake will continue to recede. Restriction of the pool level to less than 325.5-m elevation is the least expensive solution to the problem.
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    Seiten: ix, 110 Seiten , Illustrationen
    Serie: CRREL Report 84-32
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Summary Chapter 1. Introduction Location Purpose of study Previous work Chapter 2. Methodology Geology Overland erosion Wave erosion Frost penetration and heave Thaw failure Bank recession Ground water Soil moisture Chapter 3. Results Geology Geotechnical properties Overland erosion Wave erosion Freeze-thaw phenomena Ground water fluctuations Other slope failures Chapter 4. Discussion Overland erosion Wave erosion Thaw failure Universal soil loss equation Chapter 5. Summary and conclusions Techniques Erosion processes at Orwell lake Bank recession Literature cited Appendix A1: Average cumulative change of surface at erosion stations #2-12, 1980-81 Appendix A2: Cumulative net changes at overland erosion stations #1-12, 1980-81 Appendix A3: Cumulative net changes at overland erosion stations #1 -12, 198 1-82 Appendix A4: Cumulative average erosion at overland erosion stations #1-12, 1980-81 Appendix AS: Cumulative average erosion at overland erosion stations #1-12, 1981-82 Appendix A6: Cumulative average erosion at overland erosion stations #1 -1 2A, 1982 Appendix B: Dimensions of erosion sections, Orwell Lake, Minnesota Appendix C: Piezometer installation data, Orwell Lake, Minneso
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  • 23
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-82/24
    In: CRREL Report, 82-24
    Beschreibung / Inhaltsverzeichnis: Velocity data derived from petroleum industry seismic records from Harrison Bay show that high-velocity material ( or = 2 km/s) interpreted to be ice-bonded permafrost is common. In the eastern part of the bay, the depth to high velocity material increases and velocity decreases in an orderly manner with increasing distance from shore until the layer is no longer apparent. The western part of the bay is less orderly, possibly reflecting a different geological and thermal history. This western part may be an inundated section of the low coastal plain characterized by the region north of Teshekpuk Lake, and could have contained deep thaw lakes, creating low velocity zones. Along some seismic lines, the high-velocity material extends approximately 25 km offshore. Two anomalies have been found which could be associated with rapidly degrading permafrost. One is strong attenuation, which was interpreted as an indication of gas in the shallow deposits. The other is the presence of considerable seismic noise, including identifiable small seismic events. The origin of this noise has not been positively established, and it is proposed that it may indicate that some movement is occurring in the sediments due to thaw.
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    Seiten: 65 Seiten , Illustrationen
    Serie: CRREL Report 82-24
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Methods Reading records Refractions Reflections Rayleigh waves Spatial resolution Anomalies Results and discussion Seismic velocity distribution Attenuation Low-level natural seismicity Summary Literature cited Appendix A: Error estimates Appendix B: Velocity profiles Appendix C: Seismic cross sections
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  • 24
    Signatur: ZSP-201-82/26
    In: CRREL Report, 82-26
    Beschreibung / Inhaltsverzeichnis: The Caribou-Poker Creeks Research Watershed is a small (101.5-sq km) drainage basin located 48 km northwest of Fairbanks, Alaska. Elevations within the watershed range from 210 to 826 m, and approximately 28% of its area is underlain by permafrost. Climatic differences between the watershed and Fairbanks are primarily due to the higher elevation of the watershed. Generally the watershed climatic sites are warmer in winter and cooler in summer than Fairbanks. Within the watershed the greatest temperature contrasts exist in winter, when the valley-bottom sites are beneath the regional air temperature inversion, and the higher sites are above it. From May through September the total precipitation averages 270 mm, 1.47 times that received at Fairbanks. The annual precipitation is about 1.7 times that of Fairbanks. The historical precipitation record at Fairbanks indicates that summer precipitation was below the long-term normal in eight of the eleven years of watershed measurements (1969-1980); no climatic extremes occurred during this period. An analysis of annual streamflow data showed an inconsistency of baseflow recessions from year to year. The runoff-rainfall ratio for individual summer storms averaged 0.35 for Caribou Creek. Comparisons of spot discharge measurements of predominantly permafrost and non-permafrost subwatersheds showed that permafrost-dominated watersheds have a much flashier response to precipitation than non-permafrost watersheds. A comparison of the annual flow distribution of the watershed indicated that Caribou Creek has lower summer and higher winter discharges per unit area than the Chena or Salcha Rivers.
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    Seiten: 42 Seiten , Illustrationen
    Serie: CRREL Report 82-26
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Setting Geology and soils Vegetation Climate Air temperature Precipitation Hydrology Annual and monthly runoff Individual storms Baseflow recessions Spatial flow variability Temporal flow variability Summary and conclusions Literature cited Appendix A: Station histories
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  • 25
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    Bremerhaven : Alfred-Wegener-Institut für Polar- und Meeresforschung
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    Signatur: ZSP-994(1996/1997)
    In: Zweijahresbericht / Stiftung Alfred-Wegener-Institut für Polar- und Meeresforschung, 1996/1997
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    Seiten: 262 Seiten , Illustrationen
    ISSN: 0940-4546 , 1618-3703
    Serie: Zweijahresbericht / Stiftung Alfred-Wegener-Institut für Polar- und Meeresforschung 1996/1997
    Sprache: Deutsch
    Anmerkung: Inhaltsverzeichnis Organe der Stiftung Alfred-Wegener-Institut für Polar-und Meeresforschung 1. Das Alfred-Wegener-Institut und sein Beitrag zur Polar-und Meeresforschung in Deutschland 2. Ausgewählte Forschungsthemen Rekonstruktion eines Asteroideneinschlages in das Südpolarmeer (Gersonde, Abelmann, Diekmann, Kuhn) Jahreszeitliche Veränderungen einer Permafrostlandschaft in Sibirien (Boike, Hagedorn, Friedrich) Sedimentbohrungen im Baikalsee (Eckert, Müller, Schwab, Demske) Auf den Spuren eines uralten Gebirges (Schlindwein, Meyer) Reaktionen benthischer Tiefsee-Lebensgemeinschaften auf mechanische Störungen der Sedimente (Thiel, Ahnert, Bluhm, Borowski, Vopel) Die Ruderfußkrebse im Arktischen Ozean (Scherzinger, Hirche, Kattner) Diatomeenblüten an Fronten im Antarktischen Zirkumpolarstrom (Bathmann, Hense, Rutgers van der Loeff, Strass, Smetacek) Besiedlungsverhältnisse am Lomonossowrücken (Deubel, Rachor) Organischer Kohlenstoff in der Laptewsee und auf dem Lomonossowrücken (Fahl, Nöthig, Stein) Sterole und ihr Schicksal im Weddellmeer (Mühlebach, Weber) Schwierige Spurensuche (Bijma, Zeebe, Wolf-Gladrow) Die Nordgrönlandtraverse (Kipfstuhl, Schwager) Ein Reinluft-Meßlabor in der Antarktis (Minikin, Weller) Spurengase in der Atmosphäre der Polargebiete (Notholt, Lehmann) Erwärmt sich das Bodenwasser in der Grönlandsee? (Budeus, Schneider) Die JoJo-Sonde (Budeus, Ohm) Offene Wasserflächen beeinflussen die Windverhältnisse über den Polarmeeren (Birnbaum) Eistransport im Weddellmeer (Strass, Fahrbach) Die Meereisverteilung in einem gekoppelten Eis-Ozean-Modell des Südlichen Ozeans (Timmermann, Beckmann, Hellmer) Hochleistungscomputer am AWI (Hiller, Rakowsky, Beckmann) 3. Berichte der wissenschaftlichen Arbeitsgruppen 3.1 Ozeanische und atmosphärische Prozesse in den Polargebieten 3.2 Modeliierung von Prozessen und Zirkulationssystemen im Ozean 3.3 Meeresphysikalische Messungen und Instrumentenentwicklung 3.4 Physik und Chemie der polaren Atmosphäre 3.5 Der Untergrund der polaren Teile des Atlantik und seiner kontinentalen Umrandung 3.6 Glaziologie 3.7 Meeresgeologie 3.8 Geowissenschaftliche Studien in Eisrandgebieten 3.9 Ökologie und Ökophysiologie 3.10 Biologische Meereskunde 3.11 Tiefseeforschung 3.12 Meereisforschung 3.13 Der Kohlenstoffkreislauf 4. Großgeräte, Expeditionen und Landstationen 4.1 "Polarstern" 4.2 "Victor Hensen" 4.3 Polarflugzeuge 4.4 Landexpeditionen 4.5 Landstationen 5. Logistik 6. Nationale und internationale Zusammenarbeit 7. Zentrale Einrichtungen 7.1 Rechenzentrum 7.2 Bibliothek 7.3 Presse-und Öffentlichkeitsarbeit 8. Personeller Aufbau und Haushaltsentwicklung 8.1 Personal 8. 2 Haushalt 8.3 Bericht der Frauenbeauftragten 9. Veröffentlichungen Anhang I. Personal II. Wissenschaftliche Veranstaltungen III. Abgeschlossene Examensarbeiten
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  • 26
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-83/4
    In: CRREL Report, 83-4
    Beschreibung / Inhaltsverzeichnis: Measurements and analysis of seasonal ice growth and decay on Post Pond, New Hampshire, for the period 1973-1982 are presented. Observations included ice thickness measurements, examination of the various ice types contributing to the ice cover, and measurements of meteorological parameters for correlation with and modeling of the ice growth process. The overall nature of ice growth and decay (ice loss) on the Post Pond has been ascertained, the seasonal variability in the timing of freeze-up and ice-out and the duration of the ice cover have been determined, and the relationship of ice growth to freezing-degree-day (deg C) records evaluated on the basis of a Stefan conduction equation modified to deal with ice sheets covered with or free of snow. Ice growth occurs predominantly by the direct freezing of lake water, but snow ice may compose as much as 50% of the ice cover in winters with higher than average snowfall. Freeze-up leading to the establishment of a stable ice cover occurs during the 4-week period from the end of November to the end of December. Maximum seasonal ice thicknesses were from 45 to 67 cm and are generally attained during the first two weeks of March; ice-out, marking the final disappearance of ice from Post Pond, usually occurs by the third week of April. The overall rate of the ice loss is three to four times that of ice growth, and is dominated initially by melting from the top. As much as 50% of the ice may be lost in this way before the onset of any bottom melting. Final dissipation of the ice cover is usually expedited by candling resulting from preferential melting and disintegration of the ice at crystal boundaries.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 30 Seiten , Illustrationen
    Serie: CRREL Report 83-4
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Location of study Study methods Ice thickness Ice-cover composition Surface air temperatures Freeze-up and ice-out characteristics Results and discussion Ice-growth record Freezing-degree-day records Ice-growth predictions Summary and conclusions Literature cited Appendix A: Ice-growth records Appendix B: Measured and computed ice-growth curves
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  • 27
    Signatur: AWI SCAR-AR-19-92813
    In: National report to SCAR on Antarctic scientific activities for the years ... and planned program for ... : progress report, 41
    Materialart: Schriftenreihen ausleihbar
    Seiten: 25 Seiten
    Serie: National report to SCAR on Antarctic scientific activities for the years ... and planned program for ... : progress report 41
    Sprache: Englisch
    Standort: AWI Archiv
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  • 28
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-84/17
    In: CRREL Report, 84-17
    Beschreibung / Inhaltsverzeichnis: VHF-band radiowave short pulses were transmitted within the permafrost tunnel at Fox, Alaska, over distances between 2.2 and 10.5 m. The propagation medium was a frozen silt containing both disseminated and massive ice with temperatures varying from -7°C near the transmitter to probably -2 C near the center of the tunnel overburden. The short pulses underwent practically no dispersion in the coldest zones but did disperse and refract through the warmer overburden, as suggested by calculations of the effective dielectric constant. Most significantly the measured frequency content decreased as the effective dielectric constant increased. The results indicate that deep, cross-borehole pulse transmissions over distances greater than 10 m might be possible, especially when the ground is no warmer than -4°C. The information thus pined could be used for identifying major subsurface variations, including ground ice features.
    Materialart: Schriftenreihen ausleihbar
    Seiten: ii, 14 Seiten , Illustrationen
    Serie: CRREL Report 84-17
    Sprache: Englisch
    Standort: AWI Archiv
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  • 29
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-84/16
    In: CRREL Report, 84-16
    Beschreibung / Inhaltsverzeichnis: Phase composition curves are presented for a typical saline silt from Lanzhou, P.R.C., and compared to some silts from Alaska. The unfrozen water content of the Chinese silt is much higher than that of the Alaskan silts due to the large amount of soluble salts present in the silts from China, which are not present in silt from interior Alaska. When the salt is removed, the unfrozen water content is then similar for both the Chinese and Alaskan silt. Here we introduce a technique for correcting the unfrozen water content of partially frozen soils due to high salt concentrations. We calculate the equivalent molality of the salts in the unfrozen water at various temperatures from a measurement of the electrical conductivity of the extract from saturated paste.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iii, 25 Seiten , Illustrationen
    Serie: CRREL Report 84-16
    Sprache: Englisch
    Anmerkung: Contents Abstract Preface Introduction Background Materials Sample preparation Nuclear magnetic resonance Specific surface area Electrical conductivity Results and discussion Summary Literature cited Appendix A: Unfrozen water content vs temperature data for Lanzhou silt
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  • 30
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-84/11
    In: CRREL Report, 84-11
    Beschreibung / Inhaltsverzeichnis: Data obtained from two sets of data buoys either air-dropped or deployed by ship onto the Weddell Sea pack ice during the period from Dec 1978 to Nov 1980 are presented. The buoy data include position, pressure and temperature information and to date represent the most complete combined weather and pack ice drift records for the ice-covered Southern Ocean regions. The buoys tended to drift north initially and then to turn east generally between latitudes 62°S and 64°S. Buoy 1433 turned east farther south at approximately 67°S but at about the same time as buoy 0527, implying that the westerly wind belt was farther south than usual in 1979. The range of air pressures-from about 950 mb to about 1020 mb is typical of the circumpolar low pressure trough in the Southern Hemisphere. All buoys were equipped with an internal or compartment temperature sensor. The 1980 buoys also contained an external air temperature sensor in a ventilated, shielded can at 1-m height. Although differences of 10°C or more between recorded air and compartment temperatures are common, the correlation between the two measured temperatures is generally very good. The compartment temperatures are higher probably because the buoy is radiationally heated. We found that subtracting 3°C from the average daily compartment temperature yielded a good estimate of the average air temperature for any given day. This technique can be used to construct average daily air temperature records for the 1979 buoys which only contained the internal or compartment temperature sensor.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 21 Seiten , Illustrationen
    Serie: CRREL Report 84-11
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Methods and instrumentation Results Drift tracks Pressure data Temperature data Discussion Conclusions Literature cited
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  • 31
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-95/11
    In: CRREL Report, 95-11
    Beschreibung / Inhaltsverzeichnis: A pavement joint seal prevents the passage of liquids into the pavement base and the intrusion of solids into the joint. The primary mechanical requirements of a pavement seal are that it respond elastically or viscoelastically to any movement of the joint without failure and that it withstand indentation of hard objects like rocks. Because pavement joint movements and seal deformations can be large, elastomeric sealants are often used to form seals. Winter conditions are recognized as the most critical for a seal because of the possibility that failure stresses will be reached as the joint opens to a maximum and the material stiffens in response to the temperature reduction. This report reviews the specific problems and requirements that cold climates create for the performance of elastomeric seals. Emphasis is placed on the material response behavior that can lead to failure of a seal. In an attempt to clarity the mechanics of sealant and seal performance associated with low-temperature pavement applications and to address the issue of low-temperature stiffening That should be a dominant factor in the selection of a sealant, this report presents background information on the formulation and mechanical properties of elastomeric seal materials and the structural behavior of field-molded joint and crack seals.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 20 Seiten , Illustrationen
    Serie: CRREL Report 95-11
    Sprache: Englisch
    Anmerkung: CONTENTS Page Preface Introduction Elastomers and sealant formulations Mechanical behavior of sealants Phenomenological behavior of rubbers and elastomers Hyperelastic constitutive model Examples of sealant behavior Mechanical response of seals Basic structural geometry and loading configurations of seals Conventional performance testing for studying the load and deformation response of joint and crack seals Response of seals to joint movements Summary and recommendations Literature cited Abstract
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  • 32
    Signatur: ZSP-799-370
    In: Trudy Ordena Lenina Arktičeskogo i Antarktičeskogo Naučno-Issledovatelʹskogo Instituta, Tom 370
    Materialart: Schriftenreihen ausleihbar
    Seiten: 163 Seiten , Illustrationen
    Serie: Trudy Ordena Lenina Arktičeskogo i Antarktičeskogo Naučno-Issledovatelʹskogo Instituta 370
    Sprache: Russisch
    Anmerkung: In kyrillischer Schrift
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  • 33
    Monographie ausleihbar
    Monographie ausleihbar
    Leipzig : Academy of Sciences of the GDR, Central Institute for Isotope and Radiation Research
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    Signatur: AWI G6-19-93042-2
    In: Interregional Training Course on Radiochemistry, [Supplement]
    Materialart: Monographie ausleihbar
    Seiten: 88 Seiten , Illustrationen
    Sprache: Englisch
    Anmerkung: Contents Manual 2.2 The relative measurement of aktivity Lectures 1.3 Statistics / H. Baumbach 2.2 Sealed sources / K. Vormum 2.4 Energy dispersive x-ray fluorescence analysis / H.-K. Bothe 3.1 The use of carriers / H. Koch 4.3 Autoradiography / K. Freyer 6.1 Radiometric methods in environmental control / H.-J. Große
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  • 34
    Signatur: AWI SCAR-IT-19-92821
    In: Italy antarctic research report to SCAR, June-1999
    Materialart: Schriftenreihen ausleihbar
    Seiten: 15, V Seiten
    Sprache: Englisch
    Standort: AWI Archiv
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  • 35
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-80/18
    In: CRREL Report, 80-18
    Beschreibung / Inhaltsverzeichnis: The use of ice as a structural material is common practice for certain applications in cold regions. Techniques such as surface flooding or water spraying are used to accelerate ice growth rates, thereby lengthening the winter construction season. This report examines the heat and mass transfer rates from freely falling water drops in cold air. Design equations which predict the amount of supercooling of the drops as a function of outdoor ambient temperature, drop size and distance of fall are given
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 14 Seiten , Illustrationen
    Serie: CRREL Report 80-18
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Nomenclature Introduction Velocity problem Heat and mass transfer problem - A single drop Heat and mass transfer - A system of drops Literature cited Appendix A: FORTRAN IV program to calculate final drop temperature, air temperatureand humidity
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  • 36
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-80/19
    In: CRREL Report, 80-19
    Beschreibung / Inhaltsverzeichnis: During the period 1975-1978 the Federal Highway Administration sponsored a series of environmental engineering in­vestigations along the Yukon River to Prudhoe Bay Haul Road. In 1976 the Department of Energy joined these in­vestigations with a series of ecological projects which continue to the present. Both agencies research efforts were con­ducted on a cooperative basis with CRREL’s in-house research program. The objectives of the research focused on 1) an evaluation of the performance of the road, 2) an assessment of changes in the environment associated with the road, 3) documentation of flora and vegetation along the 577-km-long transect, 4) methodologies for revegetation and restoration, and 5) an assessment of biological parameters as indicators of environmental integrity. In support of these objectives, specific studies were undertaken that investigated the climate along the road, thaw and subsidence beneath and adjacent to the road, drainage and side slope performance, distribution and properties of road dust, vegetation distribution, vegetation disturbance and recovery, occurrence of weeds and weedy species, erosion and its control, revegetation and restoration, and construction of the fuel gas line. This report presents background, information on the region, detailed results of the road thaw subsidence and dust investigations, and summaries of revegetation, fuel gas line, vegetation distribution, soil, and weed studies.
    Materialart: Schriftenreihen ausleihbar
    Seiten: xv, 187 Seiten , Illustrationen
    Serie: CRREL Report 80-19
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Summary Introduction Chapter 1. The road and its environment Introduction General physiography Regional climate Surficial and bedrock geology Permafrost and ground ice General biota Vegetation Floristic survey Vegetation mapping Soils and mapping Chapter 2. Roadbed performance and associated investigations Roadbed investigations Roadbed performance Performance of drainage features Performance of sideslopes Conclusions from road, drainage and sideslope performance studies Fuel gas line construction Chapter 3. Distribution and properties of road dust along the northern portion of the Haul Road Introduction Methods Results of wind direction and velocity measurements Dust load and distribution Particle size analyses of dust Chemical composition properties of dust and related samples Soil cation composition Dust impacts on vegetation Discussion and conclusions Chapter 4. Revegetation and restoration investigations Introduction Revegetation approaches Alyeska erosion control and revegetation program Weeds and weedy plants Performance of revegetation Alyeska willow cutting program CRREL restoration experiments Conclusions Revegetation recommendations General report recommendations Literature cited Appendix A: General environmental guidelines applicable to subarctic and arctic road construction Appendix B: University-based studies along the Yukon River-Prudhoe Bay Haul Road Appendix C: CRREL maps of Haul Road showing locations of all study Sites Appendix D: Additional Haul Road cross-sectional profiles Appendix E: Clay mineralogy of road-related materials Appendix F: List of reports in the Joint State/Federal Fish and Wildlife Ad­visory Team series
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  • 37
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-80/17
    In: CRREL Report, 80-17
    Beschreibung / Inhaltsverzeichnis: Construction pads made of snow were used to build two sections of the Trans Alaska Pipeline and a small gas pipeline during the winter of 1975-76. Construction during the winter has become increasingly common in the Arctic. Surface travel and the use of heavy construction equipment on the unprotected tundra have been severely restricted, even during the winter, so the use of temporary winter roads and construction pads built of snow and ice has been advocated and is being adopted. The three snow construction pads mentioned above were the first snow roads and construction pads used on a large scale in Alaska. Snow roads and construction pads have two objectives: to protect the underlying vegetation and upper layers of the ground, and to provide a hard, smooth surface for travel and the operation of equipment. Several types have been built, and a brief discussion is given of their history and classification systems. The three snow construction pads used in construction of the Trans-Alaska Pipeline and the small gas pipeline in 1975-76 were visited and observed while in use. The Globe Creek snow pad, about 50 miles north of Fairbanks, was built primarily of manufactured snow hauled to the site and watered. With very high densities this pad withstood heavy traffic and use by heavy construction equipment except on one steep slope. There, the use of tracked vehicles and vehicles without front wheel drive disaggregated the snow on and near the surface so that vehicles without front wheel drive were unable to climb the hill. The Toolik snow pad, just north of the Brooks Range, was built of compacted snow and proved capable of supporting the heaviest traffic and construction equipment. The fuel gasline snow pad ran from the northern Brooks Range to the Arctic Coast and also proved capable of supporting the necessary traffic. Both the Toolik snow pad and the fuel gasline snow pad failed in very early May because of unseasonably warm and clear weather before the associated construction projects were completed. However, the three snow pads must be considered successful. Common problems were the lack of snow, slopes, unseasonably warm spring weather, and inexperience on the part of contractors and construction personnel.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 28 Seiten , Illustrationen
    Serie: CRREL Report 80-17
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction History of snow and ice roads Classification of snow and ice roads Snow pads used by Alyeska during the winter of 1975-1976 The Globe Creek snow pad The Toolik snow pad The gasline snow pad Summary and conclusions Literature cited
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  • 38
    Signatur: AWI A3-20-93434
    In: Meteorologische Abhandlungen / Institut für Meteorologie und Geophysik der Freien Universität Berlin, Band XXXII, Heft 1
    Materialart: Schriftenreihen ausleihbar
    Seiten: 121 Seiten , Illustrationen
    Serie: Meteorologische Abhandlungen / Institut für Meteorologie und Geophysik der Freien Universität Berlin 32,1
    Sprache: Deutsch
    Anmerkung: Zugleich: Dissertation, Freie Unversität Berlin, [ca. 1963] , INHALTSVERZEICHNIS PROBLEMSTELLUNG UND ZIELSETZUNG 1. BEMERKUNGEN ZUM BEOBACHTUNGSGELÄNDE UND ZUM BEOBACHTUNGSMATERIAL 1.1 Das Beobachtungsgelände 1.2 Das Beobachtungsmaterial 2. HOMOGENITÄTSBETRACHTUNGEN 2.1 Temperatur 2.2 Niederschlag 2.3 Wind 2.4 Sonnenschein und Bewölkung 3. TEMPERATURVERHÄLTNISSE 3.1 Monats- und Jahreswerte 3.2 Tageswerte 3.3 Pentadenwerte 3.4 Häufigkeitsbetrachtungen 3.5 Interdiurne Veränderlichkeit 3.6 Der tägliche Gang 3.7 Vorkommen bestimmter Schwellenwerte 3.71 Frost- und Eistage 3.72 Sommer- und Tropentage 4. DER WASSERGEHALT DER LUFT 4.1 Monats- und Jahreswerte 4.2 Tageswerte 4.3 Häufigkeitsbetrachtungen 4.4 Interdiurne Veränderlichkeit 4.5 Der tägliche Gang 5. BEWÖLKUNGSVERHÄLTNISSE 5.1 Monats- und Jahreswerte 5.2 Tageswerte 5.3 Häufigkeitsbetrachtungen 5.4 Der tägliche Gang 5.5 Heitere und trübe Tage 5.6 Nebel 6. SONNENSCHEIN 6.1 Monats- und Jahreswerte 6.2 Tageswerte 6.3 Der tägliche Gang 7. NIEDERSCHLAGSVERHÄLTNISSE 7.1 Monats- und Jahreswerte 7.2 Niederschlagsbereitschaft 7.3 Tageswerte 7.4 Der tägliche Gang 7.5 Häufigkeitsbetrachtungen 7.6 Niederschlags- und Trockenperioden 7.7 Niederschlag und Wind· 7.8 Schneeverhältnisse 7.81 Schneefall und Schneedecke 7.82 Schneehöhe 7.9 Gewitter 8. WINDVERHÄLTNISSE 8.1 Windrichtung 8.2 Windgeschwindigkeit 8.21 Der jährliche Gang 8.22 Häufigkeitsbetrachtungen 8.23 Sturmtage und Windstillen 8.24 Der tägliche Gang 9.ZUSAMMENFASSUNG VERZEICHNIS DER TEXTTABELLEN VERZEICHNIS DER ABBILDUNGEN LITERATURVERZEICHNIS TABELLENANHANG
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  • 39
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-95/7
    In: CRREL Report, 95-7
    Beschreibung / Inhaltsverzeichnis: Before vehicle mobility in snow can be reliably predicted, a complete understanding of motion resistance in snow is required. This report examines several aspects of wheeled vehicle motion resistance using results obtained with the CRREL instrumented vehicle. Resistances of leading and trailing tires are examined. Limited data are presented for undercarriage drag, and third and fourth wheel passes in the same rut are initially analyzed, as is how snow deforms around a wheel. For the CRREL instrumented vehicle, a trailing tire has a resistance coefficient of about 0.017 for snow depths less than about 22cm. For deeper snow, the disruption of the snowpack caused by a preceding wheel causes snow to fall into the rut, resulting in higher trailing tire coefficients. For larger vehicles, which in some cases have trailing tires carrying larger loads than preceding tires, the trailing tire coefficients are on the order of 0.048 and 0.025 for second and third trailing wheels respectively. Since there are no trailing tire data available for these larger vehicles, these values are based on nonlinear regression analysis, which includes a prediction of the leading tire resistance. The results and observations of this study are applied in a reanalysis of the towed resistance data obtained during the U.S. Army's Wheels vs. Tracks study. An improved algorithm is presented for predicting wheeled vehicle motion resistance caused by snow.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 39 Seiten , Illustrationen
    Serie: CRREL Report 95-7
    Sprache: Englisch
    Anmerkung: CONTENTS Page Preface Nomenclature Introduction Experimental procedure Results and analysis Leading tire resistance Trailing tire resistance Deep snow Undercarriage drag Multiple passes Shallow snow resistance model Summary Literature cited Appendix A: Snow data Appendix B: Observations of snow deformation by a wheel Appendix C: Wheeled vehicle motion resistance data Abstract
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  • 40
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-95/1
    In: CRREL Report, 95-1
    Beschreibung / Inhaltsverzeichnis: This report annotates the cold regions mobility prediction routines included in the CAMMS/ALBE mobility models. It further explains the development of the algorithms that are used in these models to describe the interaction of a vehicle with terrain that has been affected by cold weather. The following terrain conditions are discussed: undisturbed snow (shallow and deep); disturbed snow (moderately trafficked and hard packed); ice; and thawing soils. Several combinations of substrates are also considered. A stand-alone computer model is included.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 72 Seiten , Illustrationen
    Serie: CRREL Report 95-1
    Sprache: Englisch
    Anmerkung: CONTENTS Page Preface Nomenclature Introduction Background Shallow snow Undisturbed snow on a firm substrate Undisturbed snow on a soft substrate Undisturbed snow over ice Disturbed, processed and packed snow Deep snow Ice Freezing or thawing ground conditions Bearing capacity of freezing ground Effect of thawing conditions on vehicle performance Speed made good Internal motion resistance Slopes Summary and recornmendations Literature cited Appendix A: Cold Regions Mobility Model CRM-1.F Appendix B: FORTRAN code using NRMM/CAMMS variables and format Appendix C: Traction coefficients on packed snow Appendix D: NRMM checkout data Abstract
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  • 41
    Monographie ausleihbar
    Monographie ausleihbar
    Cambridge : Cambridge University Press
    Dazugehörige Bände
    Signatur: AWI A7-20-93527
    In: Cambridge atmospheric and space science series
    Materialart: Monographie ausleihbar
    Seiten: XVIII, 316 Seiten , Illustrationen
    Ausgabe: Transferred to digital printing
    ISBN: 0521380529 , 0521467454
    Serie: Cambridge atmospheric and space science series
    Sprache: Englisch
    Anmerkung: Contents Preface Symbols Abbreviations 1 The atmospheric boundary layer 1.1 Introduction 1.2 History 1.3 Observing the ABL 1.4 ABL modelling 1.5 Applications 1.6 Scope of the book 1.7 Nomenclature and some definitions Notes and bibliography 2 Basic equations for mean and fluctuating quantities 2.1 Turbulence and flow description 2.2 Governing equations for mean and fluctuating quantities 2.3 The simplified mean equations 2.4 The turbulence closure problem 2.5 The second-moment equations 2.6 Turbulent kinetic energy and stability parameters Notes and bibliography 3 Scaling laws for mean and turbulent quantities 3.1 The wind profile: simple considerations 3.2 Wind profile laws: the neutral case 3.3 Monin-Obukhov similarity theory: the non-neutral surface layer 3.4 Generalized ABL similarity theory 3.5 Similarity theory and turbulence statistics Notes and bibliography 4 Surface roughness and local advection 4.1 Aerodynamic characteristics of the land 4.2 Scalar roughness lengths 4.3 The vegetation canopy 4.4 Flow over the sea 4.5 Local advection and the internal boundary layer Notes and bibliography 5 Energy fluxes at the land surface 5.1 Surface energy balance and soil heat flux 5.2 Radiation fluxes 5.3 Evaporation 5.4 Condensation Notes and bibliography 6 The thermally stratified atmospheric boundary layer 6.1 The convective boundary layer 6.2 The stable (nocturnal) boundary layer 6.3 The marine atmospheric boundary layer 6.4 Mesoscale flow and IBL growth Notes and bibliography 7 The cloud-topped boundary layer 7.1 General properties of the CTBL 7.2 Observations 7.3 Radiation fluxes and cloud-top radiative cooling 7.4 Entrainment and entrainment instability 7.5 Numerical modelling of the CTBL Notes and bibliography 8 Atmospheric boundary-layer modelling and parameterization schemes 8.1 Introduction 8.2 Surface temperature 8.3 Surface humidity (soil moisture) 8.4 Canopy parameterization 8.5 Surface fluxes 8.6 Rate equation for ABL depth 8.7 Turbulence closure schemes 8.8 ABL cloud parameterization Notes and bibliography 9 The atmospheric boundary layer, climate and climate modelling 9.1 Introduction 9.2 Sensitivity of climate to the ABL and to land surface 9.3 Research priorities Notes and bibliography Appendices References Index
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  • 42
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/19
    In: CRREL Report, 81-19
    Beschreibung / Inhaltsverzeichnis: Field observations support the interpretation that differences in the strength of radar returns from the ice covers of lakes on the North Slope of Alaska can be used to determine where the lake is frozen completely to the bottom. An ice/frozen soil interface is indicated by a weak return and an ice/ water interface by a strong return. The immediate value of this result is that SLAR (side-looking airborne radar) imagery can now be used to prepare maps of large areas of the North Slope showing where the lakes are shallower or deeper than 1.7m (the approximate draft of the lake ice at the time of the SLAR flights). The bathymetry of these shallow lakes is largely unknown and is not obvious from their sizes or outlines. Such information could be very useful, for example in finding suitable year-round water supplies.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iii, 17 Seiten , Illustrationen
    Serie: CRREL Report 81-19
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction The experiment Results Maps of completely frozen North Slope lakes Literature cited
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  • 43
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/20
    In: CRREL Report, 81-20
    Beschreibung / Inhaltsverzeichnis: A historical review of research is presented to establish the state- of-the-art for analyzing the behavior of vehicles in shallow snow. From this review, the most comprehensive and promising model is put together to establish a first-cut performance prediction model for vehicles operating in shallow snow, slush, ice and thawing soils.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 21 Seiten , Illustrationen
    Serie: CRREL Report 81-20
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface List of symbols Introduction Historical review Model selection Traction Resistance Slush and thawing soils Ice, hard-packed snow, packed snow River and lake ice Model use Conclusions Literature cited
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  • 44
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/18
    In: CRREL Report, 81-18
    Beschreibung / Inhaltsverzeichnis: During the growing seasons of 1977, 1978, and 1979, revegetation techniques were studied on the Chena River Lakes Project, a flood control dam and levee near Fairbanks, Alaska, to find an optimal treatment for establishing permanent vegetation cover on the gravel structures. The treatments tested on plots at the dam andor levee involved three main variables 1 vegetation grass and clover seed andor willow cuttings, 2 mulch, mulch blanket, andor sludge, and 3 substrate gravel or fine-grained soil over the gravel base. The mulches were hay, wood-cellulose-fiber, peat moss, and Conwed Hydro Mulch 2000, which is a wood-cellulose-fiber mulch with a polysaccharide tackifier. A constant rate of fertilizer was applied to all plots except the control. A section of each plot was refertilized again in their third growing season to compare annual and biannual fertilization. The high fertilization rate produced above-average growth. Fescue, brome, and foxtail were the most productive species on the dam, while alsike cover was the most productive on the wetter levee site. When grass seed and willow cuttings were planted at the same time, willow survival and growth were reduced. Fertilization is required for at least two years to produce an acceptable permanent vegetation cover, although fine- grained soil or sludge reduces the amount of fertilizer needed in the second year. Third-year fertilization may not be necessary since the benefits of the second fertilization continue for at least two years. A sludge treatment refertilized during its second growing season produces the highest biomass recorded in this study.
    Materialart: Schriftenreihen ausleihbar
    Seiten: ix, 59 Seiten , Illustrationen
    Serie: CRREL Report 81-18
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Abbreviations Conversion factors Summary Introduction Background Site characterization Climate Purpose Materials and methods General Moose Creek Dam site Tanana Levee site Sampling and measurement Abiotic controls on vegetation Meteorological data Soil moisture as a limiting factor Soil chemical analysis Vegetation growth and survival Moose Creek Dam site Tanana Levee site Biomass by species Roof penetration Seedling density of invading woody species Weeds Supplemental observations Sediment loss Sludge and runoff-water composition Cost analysis Conclusions Literature cited Appendix A: 1977 grass growth on 1977 dam treatments Appendix B: 1978 grass growth on 1977 dam treatments Appendix C: 1979 grass growth on 1977 dam treatments Appendix D: Grass growth on 1978 dam treatments Appendix E: 1977, 1978, and 1979 survival of willow treatments Appendix F: Grass growth on Tanana levee treatments Appendix C: Chemical analysis of sludge and runoff water
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  • 45
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/21
    In: CRREL Report, 81-21
    Beschreibung / Inhaltsverzeichnis: The reflection of solar radiation by a snow cover in situ and the apparent influence of selected substrates were examined in wavelength bands centered at 0.81, 1.04, 1.10, 1.30, 1.50 and 1.80 micrometers. Substrates included winter wheat, timothy, corn, alfalfa, grass, concrete and subsurface layers of 'crusty' snow and ice. Reasonable qualitative agreement between measurements and theoretical predictions was demonstrated, with indications of quantitative agreement in the definition of a 'semi-infinite depth' of snow cover. It was concluded that ultimate quantitative agreement between theory and measurement will require that an 'optically effective grain size' be defined in terms of physically measuarable dimensions or meteorologically predictable characteristics of the ice crystals composing the snowpack.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iii, 17 Seiten , Illustrationen
    Serie: CRREL Report 81-21
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Experimental method Substrate preparation Experimental configuration Radiometric measurements Snow characterization Reflectance standards Data analysis Reflectance measurements Snow replica analysis Discussion of results Comparative reflectance of various substrates under snow Ablation of a snow cover Reflectance from a very light, fresh snow cover Measurements at angles other than vertical Reflectance from substrates Concluding observations Literature cited
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  • 46
    Signatur: ZSP-201-80/5
    In: CRREL Report, 80-5
    Beschreibung / Inhaltsverzeichnis: This research comprised laboratory testing to determine the properties of asphalt-aggregate mixtures containing three grades of asphalt cements, and analyses to project the performance of pavements containing each of the asphalts, in resisting thermally induced distress and traffic-associated distress. From the results it is concluded that only the softest asphalt cement tested (AC 2.5) would perform satisfactorily in a cold climatic zone. The moderately soft (AC 5) and moderately hard (AC 20) asphalt cements showed little susceptibility to thermal cracking in a moderate and a warm climatic zone, respectively. The AC 2.5 and AC 5 asphalts are not recommended for use in warm climates, however, owing to increased susceptibility to rutting under traffic.
    Materialart: Schriftenreihen ausleihbar
    Seiten: vi, 55 Seiten , Illustrationen
    Serie: CRREL Report 80-5
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Research setting Objectives Materials, mixture designs, and tests Materials Mixture design tests Brazil test Resilient modulus test Data analysis Marshall tests Asphalt grade Compactive effort Aggregate type Data analysis Brazil tests Indirect tensile strength Tensile strain Vertical deformation Summary of Brazil test results Data analysis-resilIient modulus. Comparison of mixture susceptibility to temperature cracking General asphalt concrete stiffness Thermal cracking. Influence of asphalt cement properties Summary Comparison of mixture susceptibility to traftic-load-associated distress Stress/strain analysis Fatigue damage analysis Rutting analysis Strength correlations Marshall stability and indirect tensile strength Indirect tensile strength and resilient modulus Summary Summary and conclusions Recapitulation of investigations Summary of results Conclusions Literature cited Appendix A: Asphalt adggregate mixture properties by Marshall method Appendix B: Equations for calculating specimen properties from Brazil tests Appendix C: Calculated displacements, strains and stresses
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  • 47
    Signatur: ZSP-201-80/4
    In: CRREL Report, 80-4
    Beschreibung / Inhaltsverzeichnis: The primary objectives of this study were to 1) prepare a map from Landsat imagery of the Upper Susitna River Basin drainage network, lakes, glaciers and snowfields, 2) identify possible faults and lineaments within the upper basin and within a 100-km radius of the proposed Devil Canyon and Watana dam sites as observed on Landsat imagery, and 3) prepare a Landsat-derived map showing the distribution of surficial geologic materials and poorly drained areas. The EROS Digital Image Enhancement System (EDIES) provided computer- enhanced images of Landsat-1 scene 5470-19560. The EDIES false color composite of this scene was used as the base for mapping drainage network, lakes, glaciers and snowfields, six surficial geologic materials units and poorly drained areas. We used some single-band and other color composites of Landsat images during interpretation. All the above maps were prepared by photointerpretation of Landsat images without using computer analysis, aerial photographs, field data, or published reports. These other data sources were used only after the mapping was completed to compare and verify the information interpreted and delineations mapped from the Landsat images. Four Landsat-1 MSS band 7 winter scenes were used in the photomosaic prepared for the lineament mapping. We mapped only those lineaments related to reported regional tectonics, although there were many more lineaments evident on the Landsat photomosaic.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iii, 41 Seiten , Illustrationen
    Serie: CRREL Report 80-4
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Summary Objectives Conclusions Introduction Background Previous cooperative investigations Project rationale and coordination Approach Landsat imagery Interpretation techniques Part I. Use of Landsat imagery in mapping the drainage network, lakes, glaciers and snowfields (Lawrence W. Gatto) Objective Methods Results Conclusions Part II. Use of Landsat imagery in mapping and evaluating geologiclineaments and possible faults (Carolyn J. Merry) Objective Geologic structure Methods Results Conclusions Part Ill. Use of Landsat imagery in mapping surficial materials Section A. Landsat mapping (Harlan L. McKim) Objective Methods Results Section B. Field evaluation (Daniel E. Lawson) Objectives Methods Results Discussion Section C. Conclusions (Daniel E. Lawson and Harlan L. McKim) Literature cited Glossary
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  • 48
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/15
    In: CRREL Report, 81-15
    Beschreibung / Inhaltsverzeichnis: This report analyzes the results of a field study previously reported by Scrivner et al. (1969) for the National Cooperative Highway Research Program. These authors studied the seasonal pavement deflection characteristics of 24 test sites on roads in service in regions with freezing indexes ranging from 100 F-days to 2100 F-days. They used the Dynaflect cyclic pavement loading device to determine the pavement system response. Of specific interest to my analysis was the increased pavement deflection after freezing and thawing and the time to recovery of normal deflection characteristics. These characteristics were related to soil and climatic factors using statistical techniques. The most significant observations of this statistical analysis are: (1) that the freezing index is not a significant parameter in determining the percent increase in pavement deflection during thawing, and (2) that the recovery time is inversely proportional to the depth of freezing. As was expected, the most significant variable affecting the increase in pavement deflection was the frost susceptibility classification. This observation reinforces the necessity for careful selection of soil materials used in pavement systems.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 10 Seiten , Ilustrationen
    Serie: CRREL Report 81-15
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Nomenclature Introduction Description of test site Test results Method of analysis Results of analysis Change in resilient deflection due to thawing, A Recovery time after onset of thawing, t20 Discussion of results Change in resilient deflection due to thawing, A. Recovery time after thawing, t20 Conclusions Literature cited ILLUSTRATIONS Figure Pavement deflection and frost penetration vs time Data points and regression line for A and t2 0 versus F Data points and regression line for A and t2 0 versus W Data points and regression line for A and t2 0 versus I Data points and regression line for A and t20 versus N Data points and regression line for A and t20 versus D Data points and regression line for t20 versus A Permeability vs void ratio for the Toledo Penn 7 material TABLES Properties of test sections Test results from Scrivner et al Results of regression analysis
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  • 49
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/16
    In: CRREL Report, 81-16
    Beschreibung / Inhaltsverzeichnis: An air-transportable shelter designed and built at CRREL for use in cold regions underwent testing in Hanover, New Hampshire, and Ft. Greely, Alaska. The shelter demonstrated some of its capabilities for mobility by being towed for more than 60 miles behind various vehicles and by being transported on a C-130 cargo airplane, a CH-47 helicopter, and a trailer truck. The shelter proved to be very easy for a crew of two to four to set up in all weather conditions including -40 F cold. However, the gasoline-powered generator, which was a source for space heat as well as electricity, functioned very poorly. Overall, the prototype successfully demonstrated qualities of self-reliance, ease of operation and thermal efficiency.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 20 Seiten , Illustrationen
    Serie: CRREL Report 81-16
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Metric conversion factors Summary Introduction Description of shelter Test procedures and results Mobility Ease of erecting and striking Therinal efficiency and performance Heat output Electrical system Habitation Safety features Water system Shelter reliability Structure Performance of other shelters Conclusions Future studies Literature cited
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  • 50
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/17
    In: CRREL Report, 81-17
    Beschreibung / Inhaltsverzeichnis: Environmental conditions are described for the continental shelf of the western Arctic, and for the shelf of Labrador and Newfoundland. Special emphasis is given to the gouging of bottom sediments by ice pressure ridges and icebergs, and an approach to systematic risk analysis is outlined. Protection os subsea pipelines and cables by trenching and direct embedment is discussed, touching on burial depth, degree of protection, and environmental impact. Conventional land techniques can be adapted for trenching across the beach and through the shallows, but in deeper water special equipment is required. The devices discussed include hydraulic dredges, submarine dredges, plows, rippers, water jets, disc saws and wheel ditchers, ladder trenchers and chain saws, routers and slot millers, ladder dredges, vibratory and percussive machines, and blasting systems. Consideration is given to the relative merits of working with seabed vehicles, or alternatively with direct surface support from vessels or from the sea ice
    Materialart: Schriftenreihen ausleihbar
    Seiten: 38 Seiten , Illustrationen
    Serie: CRREL Report 81-17
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction The western Arctic of North America The continental shelf of Newfoundland and Labrador Burial depth for pipes and cables Degree of protection offered by burial Environmental impact Trenching the beach and the shallows in the western Arctic Trenching beyond the shallows Suction, or hydraulic, dredging Bottom-t raveling cutterhead dredges Plows Rippers Water jets Subsea disc saws and wheel ditchers Subsea ladder trenchers and chain saws Subsea routers and slot millers Bucket ladder trenchers Vibratory and percussive devices Hard rock excavation under water Control and monitoring of subsea machines Vessels and vehicles Trenching from the sea ice Costs of subsea trenching Reference Appendix: Description of waters off Alaska and Newfoundland
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  • 51
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/3
    In: CRREL Report, 81- 3
    Beschreibung / Inhaltsverzeichnis: Abstract: A 1:24 scale hydraulic model study of water intake under frazil ice conditions is presented. The intake, located 9 m below the surface of the St. Lawrence River in Massena, New York,has a through flow of 0.14 m^3/s. The model study, conducted in the refrigerated flume facility of the U.S. Army Cold Regions Research and Engineering Laboratory, investigated methods of minimizing the frazil ice blockage on the intake. Two protective structures were modeled and the relative benefits of each are presented. The additional cross-sectional area provided by the protective structures lowered the vertical velocity component of the intake water to 0.0027 m/s. At this velocity the buoyant force acting on the frazil ice particle is larger than the downward drag force, causing the particle to rise. The results demonstrate that under certain low flow conditions a protective structure can minimize frazil ice blockage problems.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 11 Seiten , Illustrationen
    Serie: CRREL Report 81-03
    Sprache: Englisch
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  • 52
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/2
    In: CRREL Report, 81-2
    Beschreibung / Inhaltsverzeichnis: Abstract: Many hyperbolic reflections have been observed on marine seismic records obtained during oil exploration in the Beaufort Sea, and on USGS seismic sub-bottom profiles from the Prudhoe Bay vicinity. A hyperbolic projection system was designed to rapidly measure seismic velocities from the curves on the records. The velocities observed were approximately the velocity of sound in water. The hyperbolic signals also showed dispersion properties similar to acoustic normal modes in shallow water. These observations indicate that the signals responsible for the hyperbolic reflections propagate as normal modes within the water layer, with very limited penetration of the seabed. Determinations of the dominant frequency of these signals indicate that the penetration into the seabed has a characteristic attenuation depth (skin depth) of about 1.5 m for the sub-bottom profiles and 12 m for the marine records. It therefore appears that some hyperbolic reflections may be generated by variations in materials that occur near the seabed. There is some evidence of linearity of the anomalies, possibly related to sediment-filled or open ice gouges, or other changes in material properties at shallow depths.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 16 Seiten , Illustrationen
    Serie: CRREL Report 81-2
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Methods of analysis Marine seismic records Seismic sub-bottom profiles Results and discussion Distribution of hyperbolic reflections Hyperbolas on oil exploration records Hyperbolas on sub-bottom profiles Conclusions Literature cited Appendix A: Hyperbola projector
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  • 53
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/12
    In: CRREL Report, 81-12
    Beschreibung / Inhaltsverzeichnis: Revegetation techniques along the trans-Alaska pipeline as employed by Alyeska Pipeline Service Company during the 1975-1978 summers were observed. Objectives included determining the success of treatments, identifying problem areas, and noticing long-term implications. Observations and photographs at 60 sites located along the trans-Alaska pipeline indicated frequent occurrence of successful revegetation as well as frequent problems, such as erosion, slope instability, poor scheduling of seed application, occurrence of weed species, failure to optimally reuse topsoil and fine-grained soil, and low rates of native species reinvation. Alyeska's visual impact engineering was observed to be very successful, as shown by high first-season survival. However, a related program for establishing willow cuttings was unsuccessful in 1977 but appeared very promising in 1978 largely due to improved management and more favorable growing conditions. Terrain disturbances due to the construction of the fuel gas line, snowpads, and oil spills were examined to identify and describe related environmental impacts on natural vegetation. Proper construction and use of snowpads minimized the extent and severity of disturbance. Crude oil spills, although damaging to vegetation did not cause total kill of vegetation, and certain types of spills may have only short-term effects. Results of restoration research by CRREL along the trans-Alaska pipeline are discussed.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 115 Seiten , Illustrationen
    Serie: CRREL Report 81-12
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Summary Introduction Revegetation procedures 1975-1978 construction seasons Willow cutting program Visual impact engineering program Selected terrain disturbances Fuel gas line and snowpads Island Lake and oil line snowpads Oil spills and revegetation CRREL restoration sites Conclusions Recommendations Literature cited Appendix A: List of sites observed during 1975 Appendix B: Annotated photographs of permanent revegetation observation sites-1975-1978 Appendix C: Photographic record of fuel gas line observation sites
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  • 54
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/13
    In: CRREL Report, 81-13
    Beschreibung / Inhaltsverzeichnis: Electrical properties of frozen ground were measured using radio frequency interferometry (RFI) in the very high frequency (VHF) radiowave band. Ice-rich organic silts and sands and gravels of variable ice content were investigated during early April of both 1979 and 1980. Frequencies between 10 and 150 MHz were used with best results obtained between 40 and 100 MHz. Surface impedance and magnetic induction techniques were also used to obtain an independent measure of low frequency resistivity and to obtain a separate control on vertical inhomogeneity. Soil samples were tested for organic and water content. The dielectric constants determined for the ice-rich organic silts ranged from 4.0 to 5.5 while those for the sands and gravels were about 5.1. Dielectric loss was due to d.c. conduction and was very low for the silts but significant for the sands and gravels. The higher values for the sands and gravels were most likely due to the higher concentrations of salt that are reported to exist in the old beach ridges in this region. All the RFI measurements are believed to be indicative of only the first few meters of the ground although the radiowaves could penetrate to tens of meters.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 18 Seiten , Illustrationen
    Serie: CRREL Report 81-13
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Background Objectives and procedures Theory and instrumentation Radio frequency interferometry Case 1: Homogeneous ground model Case 2: Two-layer ground model RFI instrumentation Low frequency methods Point Barrow sites Results and discussion Site 1: Tundra Site 2: Beach ridge Site 3: Marsh Conclusions Literature cited Appendix A: Discussion of low-frequency geophysical methods
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  • 55
    Signatur: AWI Bio-21-94346
    In: Bibliotheca diatomologica, 3
    Materialart: Monographie ausleihbar
    Seiten: 386 Seiten
    ISBN: 3768213757
    Serie: Bibliotheca diatomologica 3
    Sprache: Englisch
    Standort: AWI Lesesaal
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  • 56
    Signatur: AWI Bio-21-94345
    In: Bibliotheca diatomologica, 36
    Materialart: Monographie ausleihbar
    Seiten: 382 Seiten , Illustrationen
    ISBN: 3443570275
    Serie: Die cymbelloiden Diatomeen 1
    Sprache: Deutsch
    Anmerkung: Inhalt Vorwort Foreword 1. Allgemeiner Teil 1.1 Einleitung 1.2 Methodik 1.2.1 Terminologie 1.2.2 Material 1.2.3 Bemerkungen zur Darstellung 1.2.4 Bemerkungen zur REM-Technik 1.2.5 Statistik in der taxonomischen Methodik 1.2.6 Taxonomisches Konzept 1.2.7 Bemerkungen zur Bestimmungstechnik 1.3 Merkmale und ihre Bewertung 1.3.1 Allgemeines 1.3.2 Schalenlänge 1.3.3 Schalenbreite 1.3.4 Relation Schalenlänge/Schalenbreite, Umriß, Schalenenden 1.3.5 Alveolen/Transapikalstreifen 1.3.6 Areolen/Punkte, Zahl und Form im LM und REM 1.3.7 Raphe 1.3.8 Stigmata und Stigmoide 1.3.9 Zellgürtel 1.3.10 Sonstige Merkmale, Habitus 1.3.11 Konvergenzen und Parallelitäten 1.4 Teilungszyklen, Verteilungen 1.4.1 Theoretische und tatsächliche Verteilungen 1.4.2 Variabilität von Erstlingszellen 1.4.3 Assoziationen mit ähnlichen syntopen und synchronen Arten 1.5 Ökologie 1.6 Die Gattung Cymbella sensu lato 2. Spezieller Teil 2.1 Encyonema Kützing 1833 2.1.1 Bemerkungen zu den folgenden Beschreibungen 2.1.2 Beschreibungen der Taxa 3. Lateinische Beschreibungen der neuen Taxa 3.1 Neue Gattungen 3.2 Neue Encyonema-Arten und -Varietäten Bildbeschriftungen der Taxa Index
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  • 57
    Monographie ausleihbar
    Monographie ausleihbar
    Jakutsk : Jakutskij Filial SO AN SSSR
    Signatur: AWI G3-22-94893
    Beschreibung / Inhaltsverzeichnis: В книге приводится обстоятельная и разносторонняя характеристика основных генетических типов почв аласов. Выявлено влияние термокарстового аласообразования на почвообразовательный процесс. Полученные результаты позволяют рассматривать почвы аласов как самостоятельные типы, возникновение которых связано со своеобразным аласным процессом, присущим, только термокарстовым ландшафтам. Впервые охарактеризованы особенности структуры почвенного покрова аласов и раскрыты причины ее дифференциации . Книга предназначена для почвоведов, мелиораторов, агрохимиков, а также для других специалистов сельского хозяйства и проектных организаций, связанных с использованием и освоением земель в области широкого распространения многалетнемерзлых пород.
    Beschreibung / Inhaltsverzeichnis: Translation of the abstract: The book provides a detailed and versatile description of the main genetic types of Alas soils. The influence of thermokarst alas formation on the soil-forming process was revealed. The results obtained allow us to consider alas soils as independent types, the occurrence of which is associated with a peculiar alas process, inherent only in thermokarst landscapes. For the first time the features of the structure of the soil cover of the alas were characterized and the reasons for its differentiation were revealed. The book is intended for soil scientists, land reclamators, agrochemists, as well as for other agricultural specialists and design organizations involved in the use and development of land in the area of ​​widespread permafrost.
    Materialart: Monographie ausleihbar
    Seiten: 168 Seiten , Illustrationen
    Sprache: Russisch
    Anmerkung: ОГЛАВЛЕНИЕ Введение 3 Глава 1. Природно-климатические условия 1.1. Геология и геоморфология 1.2. Многолетняя мерзлота 1.3. Почвообразующие породы 1.4. Климат 1.5. Поверхностные воды 1.6. Растительность Глава 2. Особенности почвообразования в аласах 2.1. Краткая история исследования почв аласов 2.2. Аласный термокарстовый рельеф 2.3. Влияние аласов на почвообразование 2.4. Аласный тип почвообразования Глава 3. Почвы 3.1. Зональные почвы 3.1.1. Мерзлотные палевые почвы 3.1.2. Мерзлотные палевые осолоделые почвы 3.1 .3. Мерзлотные таежные оподз аленные почвы 3.2. Почвы аласов 3.2.1. Аласные болотные и заболоченные почвы 3.2.2. Аласные луговые почвы 3.2.3. Аласные остепненные почвы Глава 4. Структура почвенного покрова аласов 4.1. Условия дифференциации почвенного покрова аласов 4.2. Структура почвенного покрова различных по рельефу аласов 4.3. Неоднородность почвенного покрова разновозрастных термокарстовых котловин Заключение Список литературы
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  • 58
    Monographie ausleihbar
    Monographie ausleihbar
    Novosibirsk : Izdatel'stvo "Nauka", Sibirskoe otdelenie
    Signatur: AWI G3-22-94892
    Beschreibung / Inhaltsverzeichnis: Приводятся новые материалы о составе, льдистости и криогенном строении аллювиальных и склоновых отложений, о диагенетическом минералообразовании в условиях вечной мерзлоты. Делается опыт прогнова изменений минимальных температур сезоннопротаивающего слоя на основе ыявленных 14- и 70-летних циклов колебаний температур вовдуха; рассматриваются особенности прибрежно-шельфовой криолитозоны. В двух статьях содержатся результаты теплобалансовых наблюдений в Центральной Лкутии, особое внимание уделяется рассмотрению теплового потока через дневную поверхность водоема, теплообмена водных масс с донными отложениями. Интересны данные о мощности и температуре многолетнемерзлых толщ, геотермическом градиенте, теплопроводности и тепловом потоке в породах равличных районов Сибири, об особенностях поведения температурного и электрического поля ПС вблизи нижней границы мерзлоты. Сборник представляет интерес для широкого круга специалистов: мерзлотоведов, теплофизиков, географов, строителей.
    Beschreibung / Inhaltsverzeichnis: Translation of the abstract: New materials are presented on the composition, ice content and cryogenic structure of alluvial and slope deposits, on diagenetic mineral formation in permafrost conditions. An experiment is made to test the changes in the minimum temperatures of the seasonally thawing layer on the basis of the identified 14- and 70-year cycles of air temperature fluctuations; the features of the coastal-shelf cryolithozone are considered. Two articles contain the results of heat-balance observations in Central Lukutia, special attention is paid to the consideration of the heat flow through the daytime surface of the reservoir, the heat exchange of water masses with bottom sediments. Of interest are the data on the thickness and temperature of permafrost, the geothermal gradient, thermal conductivity, and heat flow in the rocks of various regions of Siberia, and on the behavior of the temperature and electric field of the SL near the lower permafrost boundary. The collection is of interest to a wide range of specialists: permafrost scientists, thermal physicists, geographers, builders.
    Materialart: Monographie ausleihbar
    Seiten: 89 Seiten , Illustrationen
    Sprache: Russisch
    Anmerkung: СОДЕРЖАНИЕ Криолитологические особенности отложений малых рек в Центральной Якутии / Е.Г. Катасонова, Х.Г. Зигерт Минералообразование в области вечной мерзлоты / Х.Г. Зигерт Криогенное строение склоновых отложений на севере Среднесибирского плоскогорья / В.В. Куницкий Перелетки и основные типы сезонвомерзлых пород / Е.А. Втюрина Особенности прибрежно-шельфовой криолитозоны / А.И. Фартышев Многолетние экстремумы отрицательной температуры грунтов сезоннопротаивающего слоя в Центральной Якутии / П.А. Соловъев, Л.П. Голубых Интенсивность сезонного промерзания почвогрунтов в Заилийском Алатау / Э.В. Северский, М. В. Попов Теплопроводность крупнообломочных грунтов в горах Северного Тянь-Шаня / А. А. Мандаров Тепловой баланс крупного озера и прилегающей территории в Центральной Якутии / А.В. Павлов, М.И. Тишин Геотермические параметры Уренгойского месторождения / А.И. Левченко Теплофизические свойства многолетнемерзлых пород Мастахского месторождения газа / Н.Р. Колушев, В.Т. Балобаев, Р.И. Гаврилъев О некоторых особенностях поведения температурного и электрического поля ПС вблиаи нижней границы мерзлоты в терригенных толщах / В.О. Володько Геотермия вмещающих пород карьера "Мир" (Западная Якутия) / В.Н. Девяткин, Р.И. Гаврилъев Геотермические условия бассейна рек Курунг-Юрях и Хатат (Западная Якутия) / В.Н. Девяткин Тепловой баланс орошаемых посевов кормовых культур в Центральной Якутии / П.Н. Скрябин, О.И. Алексеева Расчет промерзания намывно й насыпи и ее основания / Н.И. Вотякова , In kyrillischer Schrift
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  • 59
    Monographie ausleihbar
    Monographie ausleihbar
    Waterloo, Ont. : University of Waterloo
    Signatur: AWI G3-23-95003
    Materialart: Monographie ausleihbar
    Seiten: xviii, 181 Seiten , Illustrationen , 28 cm
    Sprache: Englisch
    Anmerkung: Masterarbeit, University of Waterloo, 1995 , TABLE OF CONTENTS TITLE PAGE AUTHOR'S DECLARATION BORROWER'S PAGE ABSTRACT ACKNOWLEDGEMENTS DEDICATION LIST OF TABLES LIST OF FIGURES LIST OF PLATES CHAPTER 1 INTRODUCTION 1.1 INTRODUCTION 1.2 PURPOSE 1.3 OBJECTIVES CHAPTER 2 LITERATURE REVIEW 2.1 INTRODUCTION 2.2 THERMAL REGIME 2.3 INHERENT PHYSICAL CHARACTERISTICS 2.4 HYDROLOGICAL REGIME 2.5 INTEGRATED STUDIES 2.6 SUMMARY CHAPTER 3 STUDY SITE LOCATION 3.1 INTRODUCTION 3.2 REGIONAL CLIMATE 3.3 GEOLOGY 3.4 VEGETATION 3.5 COLOUR LAKE BASIN CHAPTER4 INHERENT PHYSICAL CHARACTERISTICS OF THE ACTIVE LAYER 4.1 INTRODUCTION 4.2 METHODS 4.3 RESULTS 4.4 DISCUSSION 4.4.1 SS, EIF and GC Transects 4.4.2 Permafrost Transects 4.5 SUMMARY CHAPTER 5 THERMAL CHARACTERISTICS OF THE ACTIVE LAYER 5.1 lNTRODUCTION 5.2 THEORY 5.2.1 Energy Balance 5.2.2 Active Layer Development 5.3 METHODS 5.3.1 Energy Balance 5.3.2 Ground Thermal Regime 5.3.3 Predicting of Active Layer Depths 5.4 RESULTS 5.4.1 Energy Balance 5.4.2 Ground Thermal Regime 5.4.3 Predicting Active Layer Depths 5.5 DISCUSSION 5.S.1 Energy Balance 5.5.2 Ground Temperatures and Ground Heat Flux 5.5.3 Predicting Active Layer Depths 5.6 SUMMARY CHAPTER 6 HYDROLOGICAL CHARACTERISTICS OF THE ACTIVE LAYER 6.1 INTRODUCTION 6.2 THEORY 6.2.1 Moisture Distribution 6.2.2 Maximum Storage within the Active Layer 6.3 METHODS 6.3.1 Moisture Profiles Using TDR 6.3.2 Precipitation and Evaporation 6.3.3 Changes in Water Storage in the Active Layer 6.3.4 Maximum Water Storage in the Active Layer 6.4 RESULTS 6.4.1 Moisture Distribution 6.4.1.1 Water Content Peaks 6.4.1.2 Apparent Unfrozen Water Content 6.4.1.3 Temporal Trends of a Typical Moisture Profile 6.4.1.4 Deviations from a Typical Site 6.4.1.5 Moisture Distribution Along a Hillslope 6.4.2 Precipitation Infiltration 6.4.3. Water Storage 6.5 DISCUSSION 6.5.1 Effect of Hydrology on Active Layer Development 6.5.1.1 Precipitation 6.5.1.2 Ice and Water Content 6.5.1.3 Seasonal Changes in Soil Moisture Distribution 6.5.2 Effect of Active Layer on Hydrology 6.5.2. 1 Impermeable Boundary 6.5.2.2 Subsurface Ponding 6.5.2.3 Permafrost/Active Layer Boundary Topography 6.5.2.4 Effect of Active Layer Hydrology on Surface Water 6.6 SUMMARY CHAPTER 7 CLIMATE CHANGE AND ACTIVE LAYER DEVELOPMENT 7.1 INTRODUCTION 7.2 SUMMARY 7.3 CLIMATE CHANGE 7.3.1 Introduction 7.3.2 Increase of Temperature 7.3.3 Changing Precipitation 7.4 REMOTE SENSING 7.5 RECOMMENDATION FOR FuRTHER RESEARCH APPENDIX A PHYSICAL CHARACTERISTICS APPENDIX A.1: ACTIVE LAYER DEPTHS APPENDIX B THERMAL CHARACTERISTICS APPENDIX B.1: BASE CAMP METEOROLOGICAL STATION OBSERVATIONS APPENDIX B.2: DAILY ENERGY-BALANCE SUMMARY APPENDIX B.3: MONTHLY AVERAGES FROM THE DESERT RESEARCH INSTITUTE METEOROLOGICAL STATION APPENDIX B.4: EXAMPLE OF DIURNAL FLUCTUATIONS IN TEMPERATURE AND ENERGY BALANCE COMPONENTS APPENDIX B.5: SOIL TEMPERATURES AT THE INTENSIVE STUDY SITES APPENDIX B.6: ACCUMULATED THAWING DEGREE DAYS APPENDIX B.7: CURVE FOR FENWALL THERMISTORS APPENDIX B.8: RELATIONSHIP BETWEEN √ADDT AND √TT APPENDIX C HYDROLOGICAL CHARACTERISTICS APPENDIX C.1: VOLUMETRIC WATER CONTENT VALUES APPENDIX C.2: POTENTIAL INFILTRATION REFERENCES , Englisch
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  • 60
    Monographie ausleihbar
    Monographie ausleihbar
    Sankt.Peterburg : Izdatel'stvo "Mir i Sem'ja 95", Glavnoe Agentstvo Vozdušnych Soobščenij Rossijskoj Federacii
    Signatur: AWI Bio-23-95317
    Materialart: Monographie ausleihbar
    Seiten: 119 Seiten , Illustrationen , 1 Beilage
    ISBN: 5-90016-27-1
    Sprache: Russisch , Englisch , Französisch
    Anmerkung: Zum Teil in kyrillischer Schrift. , Text in russischer, englischer und französischer Sprache
    Standort: AWI Lesesaal
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  • 61
    Monographie ausleihbar
    Monographie ausleihbar
    Novosibirsk : Izdatel'stvo "Nauka", Sibirskoe otdelenie
    Dazugehörige Bände
    Signatur: AWI G3-24-95571-9
    In: Tektonika Sibiri, Tom 9
    Beschreibung / Inhaltsverzeichnis: Представлены материалы XII сессии Научного совета no тектонике Сибири и Дальнего Востока, посвященной 60-летию Великой Октябрьской социалистической революции (Красноярск, 1977 r.). Рассмотрены общие вопросы тектоники нефтегазоносных областей, приведены соответствующие конкретные материалы по отдельным районам Сибири и Дальнего Востока. Изложены новые представления о региональной тектонике Западно-Сибирской плиты, Сибирской платформы, Алданского щита, северо-западной части Тихоокеанскоrо пояса. Сборник рассчитан на широкий круr rеолоrов.
    Beschreibung / Inhaltsverzeichnis: Translation of abstract: The materials of the XII session of the Scientific Council on the tectonics of Siberia and the Far East, dedicated to the 60th anniversary of the Great October Socialist Revolution (Krasnoyarsk, 1977), are presented. General issues of tectonics of oil and gas bearing areas are considered, and relevant specific materials on individual regions of Siberia and the Far East are presented. New ideas about the regional tectonics of the West Siberian Plate, the Siberian Platform, the Aldan Shield, and the northwestern part of the Pacific Belt are presented. The collection is designed for a wide audience.
    Materialart: Monographie ausleihbar
    Seiten: 158 Seiten , Illustrationen
    Serie: Tektonika Sibiri / Akademija Nauk SSSR, Sibirskoe Otdelenie, Naučnyj Sovet po Tektonike Sibiri i Dalʹnego Vostoka Tom 9
    Sprache: Russisch
    Anmerkung: СОДЕРЖАНИЕ Предисловие Принципы и методика построения тектонических карт нефтегазоносных территорий СССР / Г. Х. Дикенштейн, Ю. Н. Швембергер, И. М. Алиев Требования к содержанию и принципы построения тектонических карт нефтегазоносных территорий / В. С. Старосельцев Количественные подходы к тектоническому районированию нефтегазоносных областей (на примере Енисей-Ленского регионального мегапрогиба) / Ю. Н. Карогодин, А. И. Прокопенко Тектоника палеозойского нефтегазоносного комплекса юга Западно-Сибирской плиты / Н. П. Запивалов, В. И. Московская, И. И. Плуман Тектоника и генезис Западно-Сибирской плиты в свете новых геолого-геофизических данных / М. Я. Рудкевич Связь трещиноватости пород с пликативными структурами первого порядка (на примере Западно-Сибирской плиты и Вилюйской гемисинеклизы) / К. И. Микуленко, Е. Д. Глухманчук, Л. А. Сечкина, Г. Г. Шемин Эпикаледонские наложенные впадины и их газоносность / Е. Д. Думнов Особенности строения фундамента Минусинского межгорного прогиба / Я. В. Шатов, П. С. Долгушин, 3. В. Разилова Структурные особенности платформенного чехла западной части Сибирской платформы в связи с оценкой перспектив поисков месторождений нефти и газа / В. Д. Накаряков, К. Н. Васильева, А. М Иванов, В. Е. Кучеров, В. Г. Сибгатуллиn, Ю. А. Шарыгин Анализ палеотектонических движений Сибирской платформы в связи с оценкой генерации и аккумуляции углеводородов и консервация их залежей в домезозойских отложениях / Т. К Баженова, Ю. И. Ипатов, К. К. Макаров, Ю. М. Шуменкова Тектоническое районирование Вилюйской гемисинеклизы в связи с ее нефтегазоносностью / В. Е. Бакин, В. А. Богдашев, А. А. Гудков, К. И. Микуленко, В. С. Ситников О блоковом строении и иефтегазоносности Тунгусского бассейна / Б. А.Соколов, В. А. Егоров, Ю. Р. Мазор, Ю. В. Пискарев История формирования и перспективы нефтегазоносности Момо-3ырянской впадины / Б. И. Ким Результаты и проблемы изучения тектоники западной части Сибирской платформы и Енисей-Хатангского прогиба по геолого-геофизическим данным / В. И. Яскевич, Ю. К. Яковлев, А. П. Четвергов, В. П. Ключко, В. И. Степанов Тектонический анализ платформенных структур методом построения графиков амплитуд / Е, М. Максимов Тектоника о. Сахалин и прилегающего шельфа / В. В Харахинов, В. Э. Kононов, Ю. С. Мавринский, А. А. Терещепков, Ю. А. Тронов Разломы о. Сахалин и прилегающего шельфа / В. В Харахинов, С. Д. Гальцев-Безюк, Ю. С. Мавринский, А. А. Терещенко, И. М. Альперович Основные структурные елементы Хоккайдо-Сахалинской складчатой области / В. И. Головинский, И. И. Тютрин Прогибы зоны сочленения Сихотэ-Алинской и Хоккайдо-Сахалинской складчатых систем / Н. В. Kуликов, А. А. Терещенков Эндогенный режим Сахалина / Д. Ф. Семенов, Л. С. Маргулис, А. А. Апдреев, В. Ф. Евсеев О тектонике Охотского моря / Ю. С. Мавринский, В. А. Бабошина, Н. В. Kуликов, В. В. Харахинов Строение, развитие и перспективы нефтегазоносности подводных окраин Западной Африки и Восточной Азии / А. Ю. Юнов Формационный анализ осадочных бассейнов северо-западной части Тихоокеанскоrо пояса / Ю. K. Вурлин, О. K. Важенова Методика неотектонического анализа переходной зоны от континента к океану / Г. Ф. Уфимцев , Translation of Contents Preface Principles and methods for constructing tectonic maps of oil and gas-bearing territories of the USSR / G. Kh. Dikenshtein, Yu. N. Shvemberger, I. M. Aliev Content requirements and principles for constructing tectonic maps of oil and gas-bearing territories / V. S. Staroseltsev Quantitative approaches to tectonic zoning of oil and gas-bearing regions (on the example of the Yenisei-Lena regional megatrough) / Yu. N. Karogodin, A. I. Prokopenko Tectonics of the Paleozoic oil and gas complex of the south of the West Siberian Plate / N. P. Zapivalov, V. I. Moskovskaya, I. I. Pluman Tectonics and genesis of the West Siberian plate in the light of new geological and geophysical data / M. Ya. Rudkevich Relationship between rock fracturing and first-order plicative structures (using the example of the West Siberian Plate and the Vilyui hemisyneclise) / K. I. Mikulenko, E. D. Glukhmanchuk, L. A. Sechkina, G. G. Shemin Epicaledonian superimposed depressions and their gas content / E. D. Dumnov Features of the structure of the foundation of the Minusinsk intermountain trough / Ya. V. Shatov, P. S. Dolgushin, Z. V. Razilova Structural features of the platform cover of the western part of the Siberian platform in connection with the assessment of prospects for prospecting for oil and gas fields / V. D. Nakaryakov, K. N. Vasilyeva, A. M. Ivanov, V. E. Kucherov, V. G. Sibgatullin, Yu. A. Sharygin Analysis of paleotectonic movements of the Siberian platform in connection with the assessment of the generation and accumulation of hydrocarbons and the conservation of their deposits in pre-Mesozoic deposits / T. K. Bazhenova, Yu. I. Ipatov, K. K. Makarov, Yu. M. Shumenkova Tectonic zoning of the Vilyui hemisyneclise in connection with its oil and gas potential / V. E. Bakin, V. A. Bogdashev, A. A. Gudkov, K. I. Mikulenko, V. S. Sitnikov On the block structure and oil and gas content of the Tunguska basin / B. A. Sokolov, V. A. Egorov, Yu. R. Mazor, Yu. V. Piskarev History of formation and prospects for oil and gas potential of the Momo-3yryansk depression / B. I. Kim Results and problems of studying the tectonics of the western part of the Siberian platform and the Yenisei-Khatanga trough based on geological and geophysical data / V. I. Yaskevich, Yu. K. Yakovlev, A. P. Chetvergov, V. P. Klyuchko, V. I. Stepanov Tectonic analysis of platform structures by constructing amplitude graphs / E, M. Maksimov Tectonics o. Sakhalin and the adjacent shelf / V. V. Kharakhinov, V. E. Kononov, Yu. S. Mavrinsky, A. A. Tereshchepkov, Yu. A. Tronov Faults o. Sakhalin and the adjacent shelf / V. V. Kharakhinov, S. D. Galtsev-Bezyuk, Yu. S. Mavrinsky, A. A. Tereshchenko, I. M. Alperovich Main structural elements of the Hokkaido-Sakhalin folded region / V. I. Golovinsky, I. I. Tyutrin Deflections of the junction zone of the Sikhote-Alin and Hokkaido-Sakhalin fold systems / N. V. Kulikov, A. A. Tereshchenkov Endogenous regime of Sakhalin / D. F. Semenov, L. S. Margulis, A. A. Apdreev, V. F. Evseev On the tectonics of the Sea of Okhotsk / Yu. S. Mavrinsky, V. A. Baboshina, N. V. Kulikov, V. V. Kharakhinov Structure, development and prospects for oil and gas potential of the underwater margins of West Africa and East Asia / A. Yu. Yunov Formational analysis of sedimentary basins of the northwestern part of the Pacific belt / Yu. K. Vurlin, O. K. Vazhenova Methodology for neotectonic analysis of the transition zone from the continent to the ocean / G. F. Ufimtsev , In kyrillischer Schrift
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  • 62
    Signatur: ZSP-312-1997,1
    In: Geografija i prirodnye resursy, 1/1997
    Materialart: Schriftenreihen ausleihbar
    Seiten: 203 Seiten , Illustrationen
    ISSN: 0206-1619
    Serie: Geografija i prirodnye resursy 1/1997
    Sprache: Russisch
    Anmerkung: Contents: Natural-resource regionalization of Russia / I. L. Savelyeva. - Ecological substantiation of land improvement in Russia / V. M. Ivonin. - Soil and geochemical mapping for purposes of environment conservation / A. D. Abalakov, E. G. Nechaeva, A. I. Schetnikov. - Equiplains and equiplainazation in the mountains of South Siberia / L. N. Ivanovsky. - Environmental control. - Changes of natural conditions under the influence of reservoirs / Yu. B. Trzhtsinsky, E. A. Kozyreva, O. A. Mazayeva. - Consequences of Severomuisky tunnel construction / L. L. Shabynin. - On heavy metals content in glaciers of Katunsky Ridge / A. A. Bondarovich. - Changes of mercury concentration in natural objects of the ecosystem of Kureiskoye Reservoir / L. M. Sorokovikova, L. D. Andrulaitis, V. M. Domysheva. - Nature management in the Baikal Basin. - Dam lakes of the East Siberia rifts' floor: the evidence from the past and likelyhood in the future / A. A. Kulchitsky, T. M. Skovitina, G. F. Ufimtsev. - Changes of state of the South Baikal Shelf under the influence of drainage waters from the Baikal Pulp and Paper Mill (BPPM) / E. I. Grosheva, R. P. Loseva, N. I. Kchotilovitch, G. N. Voronskaya, G. V. Belyavtseva, N. P. Melchakova, E. V. Shisiareva. - Patterns of structure and development of mountain landscapes of Pribaikalye (on the example of Baikal Ridge) / V. M. Plyusnin. - Geomorfological processes of the Priolkhonye in Holocene / S. A. Makarov. - Regional problems of nature studying and using the natural resources. - Special features of river bends in variuos natural environments (on the example of rivers Vychegda, Tchulym, Viluyi) / A. S. Zavadsky, L. N. Nikitina, R. S. Chalov. - The relief of and contemporary exogenic processes in the basins of Tsipa Branch (North-West of Zabaikalye) / V. B. Vyrkin. - Loose deposits and exogenic processes on the watershed of rivers Kaya and Irkut / D. D. Perevoznikov. - Quaternary volcanic ash in landscapes of Northern Priochotye / A. A. Galanin, O. P. Galanina. - Dynamics of landscape-climatic turns in the PriYenisei part of Kasskaya Plain in Holocene / A. D. Koshkarov, V. L. Koshkarova. - Consentration of microelements, and its season changes in conditions of PriokskoTerrasny biosphere nature reserve / S. V. Litkens. - Development and allocation of productive forces. - Restoration of sea bottom ecosystems (ecologic-economical aspect) / V. V. Zharikov, B. V. Preobrazhensky. - An assessment of territorial ecological balance in the Krasnoyarsk industrial-urban agglomeration / A. E. Miroshnikov, T. P. Strimzha, O. V. Antsiferova, N. A. Kochneva, S. V. Maksimova. - Traditional culture as base of sustainable development of indigenous people of the North / D. D. Mangataeva, G. Fondale. - Techniques of scientific studies. - Principles and methods of desighning ecologic-geographical maps using satellite imagery / B. L. Kochurov, N. N. Malakhova. - Nature-ecological assessment of urban environmental quality / T. I. Konovalova, I. E. Trofimova. - Some approaches to assessment of climate resources / L. B. Bashalkhanova. - An appraisement of thunderstorms and fire danger in forests of the left bank of River Yenisei / V. A. Ivanov, G. A. Ivanova. - Experimental creation of an artificial dune on the sandy shore of the Black Sea / Yu. D. Shuisky, G. V. Vykhovanets. - Geography abroad. - Heavy metals in bio-objects of fresh water ecosystems of Japan / P. V. Ivashov, S. E. Sirotsky. - Maunder minimum of solar activity in the evolution of natural environment of Eastern Mongolia / V. P. Chichagov. - Reviews. - Conception of sustainable development in the Irkutsk Region / Yu. P. Michailov. - Integrational potential of Geography / A. P. Chechel. - State of landscapes: the book on detailed researches in Priladozhie / V. A. Snytko. - Chronicles. - Geoinformation technologies in the environmental mapping: the International Conference in Irkutsk / A. R. Batuev, V. A. Chervyakov. - The simposium in Poland: eolian processes and shapes of the relief / T. Schipek, G. N. Martyanova, V. A. Snytko. - Geographical scientific conferences in Smolensk / V. B. Pozdeev. - Anniversaries. - On the 75-th anniversary of Aleksey Alexandrovitch Nedeshev. , In kyrillischer Schrift
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  • 63
    Monographie ausleihbar
    Monographie ausleihbar
    Sosnowiec : Uniwersytet Śląski, Instytut Geografii
    Signatur: AWI P9-83-1079
    Materialart: Monographie ausleihbar
    Seiten: 248 Seiten , Illustrationen, Karten
    Sprache: Polnisch
    Anmerkung: Contents: A snow cover in the region of Fiord Hornsund on Spitsbergen / J. Pereyma. - Temperature rations in summer on the Waldemar Glacier and on the Waldemar sea lowland / G. Wójcik, K. Marciniak, R. Przybylak. - Precipitation and evaporation in Werenskiold Glacier district / A. Szczepankiewicz-Szmyrka. - Biometeorological conditions on the Werenskiold Glacier forefield in summer of 1980 / A. Szczepankiewicz-Szmyrka. - Some notes on wind directions in the West Spitsbergen in 1980 / K. Gerstmann. - Radar measurements of the thickness of the Werenskiold Glacier / R. Czajkowski - The analysis of movements of the Werenskiold Glacier based on dating of fossil moss / H. Chmal - Increase in the mass of the firn snow in the glacial amphiteatre of the Penck Glacier in the period 1934 to 1958 / C. Lipert - Some automatic systems to collect and transmission stored data using various radio-links / J. Molski. - Würm and Holocene glaciations of North-Western Sörkappland exemplified by the Slakli Valley, Spitsbergen / P. Kłysz, L. Lindner. - The marine origin of Lisbetdalen mezorelief SW Spitsbergen / W. Stankowski - Raised marine terraces of Kulmstranda North-Western Sörkappland / P. Kłysz, L. Lindner - The geomorphological sketch map of the Gåsdalen region, South Spitsbergen / J. Jania, Z. Lentowicz, T. Szczypek, J. Wach. - Last deglaciation of Treskelen Peninsula, Hornsund, Svalbard / L. Marks. - The recession of Vitkovski Glacier as recorded in its marginal zone / L. Andrzejewski, w. Stankowski. - Degradation processes on the end moraine of the Werenskiold Glacier / J. Cegła, J. Kida. - Studies of the dessication crack on the forefield of the Werenskiold Glacier / J. Cegła. - The beginning and evolution of the marginal outwash on the forefield of the Eliza Glacier / A. Olazewski. K. Sendobry. - Summer thawing of the ground in the Kaffiöyra, SW Spitsbergen / K. Marciniak, W. Szczepanik, R. Przybylak - Morphology and sedimentary environments of the Baszkara ·and Dzankuat Glaciers in the High Kaukas / A. Karczewski, A. Kostrzewski,P. W. Kowalew. - Stratigraphic position and remarks on sedimentation of the Brentskardhaugen Bed, Spitsbergen / A. Wierzbowski, G. Biernat, C. Kulicki. - Some remarks concerning the structure of groups of the bottom fauna of the Admiralty Bay - King George Island, South Shetland / P. Presler, K. Jażdżewski·, W. Jurasz, W. Kittel, J. Siciński. - Biological indexes of the hydrological conditions - observations from Hornsund region, Spitsbergen / J. M. Węsławski. - The habitability of the littoraly rocks in region Steinvika and Hyttevika Bays, Vestspitsbergen / O. Różycki, M. Gruszczynski. - Some aspects of the acoustical estimation of the krill abundance / M. Brzozowska. - Liberation of carbon dioxide from tundra soils / H. Dziadowiec. - Exploration in the Hornsundfiord region / J. Szupryczyński. - , In polnischer Sprache
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  • 64
    Signatur: ZSP-321-84
    In: GEOMAR-Report, 84
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Die pliozänen Sedimentprofile der ODP-Bohrungen 925-929 bilden einen Tiefenwasserabschnitt im äquatorialen Westatlantik zwischen 3000 und 4400 m Wassertiefe und wurden für die Zeitscheiben 3.3-2.6 Ma und 5.1-4.4 Ma untersucht. Anhand von zeitlich hochauflösenden isotopisch-sedimentalogischen Datensätzen wurden die Zusammenhänge zwischen Änderungen im polaren Eishaushalt, ozeanischer Zirkulation, Tiefenwasserdurchlüftung, Karbonatlösung und terrigenem Sedimenteintrag vom Amazonas näher rekonstruiert. Dafür wurden die Zeitreihen an die astronomische Zeitskala von Laskar et al. ( 1993) angepaßt. Die vorliegende Studie belegt erstmals, daß die Schließung des Panama-Seeweges vor 4.6 Ma einen kritischen Grenzwert überschritt, der nachweislich zu einschneidenden Veränderungen in der thermohalinen Zirkulation und der Tiefenwasserchemie führte. Das frühe Pliozän vor 5-4.6 Ma zeichnete sich durch eine extreme Karbonatlösung und eine geringe Tiefenwasserdurchlüftung aus. Im Zuge der Schließung führte die Intensivierung des Golfstromes mit einem erhöhten Salz- und Wärmetransport in den Nordatlantik und die Anregung der dortigen Tiefenwasserbildung zu einer verstärkten thermohalinen Zirkulation und letztendlich zu einer verbesserten Tiefenwasserdurchlüftung und Karbonaterhaltung im äquatorialen Atlantik. Damit verbunden war eine Absenkung der Lysokline bis zu 1000 m. Ein pazifisch-atlantischer Vergleich von Karbonatlösungsindikatoren zeigt, daß sich die chemische Asymmetrie zwischen beiden Ozeanen, wie sie auch heute noch besteht, bereits ab 4.6 Ma entwickelte. Zeitgleich mit der Verflachung des mittelamerikanischen Seeweges vor 4.6 Ma weist ein deutlicher Anstieg in den siliziklastischen Akkumulationsraten gemeinsam mit Ergebnissen aus terrestrisch-lakustrinen Poilenprofilen auf die verstärkte Hebung der Anden hin. Mit der Intensivierung der Nordhemisphärenvereisung vor 3.15-2.6 Ma wurden die Schwankungen in den Sauerstoffisotopenkurven oberhalb 3300 m Wassertiefe (NADW = Nordatlantisches Tiefenwasser) von einem 100 ka-Zyklus dominiert, während sie darunter von dem für das Pliozän typischen 41 ka-Zyklus der Erdschiefe dominiert wurden. Möglicherweise ist das Auftreten des 100 ka-Zyklus ein typisches Phänomen für Zeitintervalle, die mit einem verstärkten Eisaufbau einhergehen, wie z. B. das Pleistozän der letzten 800 ka. Im Zuge der Vereisung nahm die Bildung von NADW ab und führte im äquatorialen Atlantik zu einer graduellen Abnahme in der Tiefenwasserdurchlüftung und Karbonaterhaltung. Während die Lysoklinentiefe in den Warmstadien in etwa der heutigen Lage entsprach ( ca. 4300 m Wassertiefe ), verlagerte sich die glaziale Lysokline in flachere Wassertiefen um etwa 3500 m. Die Schwankungen in der Lysoklinentiefe (Grenzfläche NADW/AABW) wurden dabei vom 41 ka-Zyklus dominiert, wobei die Lösungsmaximaden Maxima im Eisvolumen mit zunehmender Wassertiefe vorauseilten. Im Bereich des NADW schwankten Karbonatlösung und Eisvolumen in Phase und dokumentieren den bekannten atlantischen Karbonaterhaltungstyp. In einer Wassertiefe unterhalb 4000 m, also im Bereich der Mischzone NADW/AABW oder im AABW (=Antarktisches Bodenwasser), eilten die Karbonatlösungsmaxima den Maxima im Eisvolumen bis zu 5000 Jahren voraus, ein Phasenunterschied, der typisch für südatlantische Wassermassen ist. Die pliozäne terrigene Sedimentanlieferung von Amazonasfracht zur Ceara Schwelle wurde nach spektralanalytischen Ergebnissen nicht durch Meeresspiegelschwankungen oder kontinentale Klimaänderungen (Niederschläge, Vegetation) kontrolliert, sondern vielmehr durch strömungsbedingte Transportprozesse im Zusammenhang mit dem nordbrasilianischen Küstenstrom.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 183 Seiten , Illustrationen
    Serie: GEOMAR-Report 84
    Sprache: Deutsch
    Anmerkung: Zugleich: Dissertation, Universität Kiel, 1998
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  • 65
    Signatur: AWI A13-19-92400
    Beschreibung / Inhaltsverzeichnis: Das Buch bietet eine Einführung in die moderne Klimatologie mit ihren Prognose- und Interpretationsmodellen. Es gibt einen Überblick über die Vorstellungen, die man heute vom Klima und von klimarelevanten Prozessen hat, und wie man diese konzeptionell und quantitativ - also mit Modellen - zu beschreiben versucht. Der Text ist allgemein verständlich geschrieben und setzt keine besonderen Kenntnisse der Mathematik und Physik voraus. Dieses Lehrbuch basiert auf einer Vorlesung am Meteorologischen Institut der Universität Hamburg und richtet sich hauptsächlich an Studenten der Geowissenschaften und Physik, daneben an ebenfalls mit Klima befaßten Disziplinen der Land-, Forst- und Umweltwissenschaften
    Materialart: Monographie ausleihbar
    Seiten: 273 Seiten , Illustrationen
    Ausgabe: Manuskript
    Sprache: Deutsch
    Anmerkung: Inhalt 1 Einführung 1.1 Übersicht 1.2 Das moderne naturwissenschaftliche Verständnis von Klima 1.3 Die Rolle von Modellen in der Klimaforschung 2 Klimarelevante Prozesse 2.1 Energie und Strahlung 2.2 Dynamik der Atmosphäre 2.3 Die Zirkulation des Ozeans 2.4 Spurenstof-Kreisläufe 2.5 Die Kryosphäre 3 Natürliche Klimavariabilität 3.1 Jahres- und Tagesgang 3.2 Wetter 3.3 Interannuale Klimaschwankungen 3.4 Die Homogenitätsproblematik 3.5 Historische Klima-Variationen 3.6 Paläoklimatologie 4 Konzeptionelle Modelle 4.1 Klimazonen 4.2 Ein exemplarisches Energiebilanzmodell 4.3 Physikalisch orientierte Modelle 4.4 Nichtlinearität und Chaos 4.5 Fluktuationen als stochastische Vorgänge 4.6 Wechselwirkungen verschiedener Prozesse 5 Grundlagen von Strömungsmodellen 5.1 Grundgleichungen der Strömungs- und Thermodynamik 5.2 Diskretisierung 5.3 Parametrisierung und subskalige Prozesse 5.4 Numerische Integration 6 Realitätsnahe Modelle des Klimasystems 6.1 Wettervorhersagemodelle 6.2 Modelle zur Klimasimulation 6.3 Simulationen von Klimazuständen 6.4 Numerische Experimente mit Modellen 6.5 Anwendung zur Klimavorhersage 6.6 Beurteilung der Klimamodelle 7 Anthropogene Klimaänderung 7.1 Übersicht 7.2 Emissions- und Konzentrations-Szenarien 7.3 Klimaszenarien realitätsnaher Modelle 7.4 Nachweis anthropogener Klimabeeinflussung 7.5 Lokale und regionale Szenarien 8 Klima und Gesellschaft 8.1 Übersicht 8.2 Historischer Überblick: gesellschaftliche Vorstellungen zum Einfluß von Klima 8.3 Klimafolgenforschung 8.4 Ökonomische Aspekte des Klimawandels 8.5 Vorstellungen von Klimawandel 9 Résumé 10 Anhang 11 Literatur Stichwortverzeichnis
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  • 66
    Monographie ausleihbar
    Monographie ausleihbar
    Leningrad : Gidrometeoizdat
    Signatur: AWI A4-19-92407
    Materialart: Monographie ausleihbar
    Seiten: 127 Seiten , Illustrationen
    Sprache: Russisch
    Anmerkung: In kyrillischer Schrift
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  • 67
    Signatur: ZSP-321-38
    In: GEOMAR-Report, 38
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Im südlichen Südatlantik wurden umfassende Untersuchungen zum Bariumkreislauf durchgeführt. Sie dienen zum besseren Verständnis des Barium/Barytsignals als Produktivitäts- 'bzw. Paläoproduktivitätsanzeiger in antarktischen Sedimenten und sollen Rückschlüsse auf die Paläozeanographie im Antarktischen Zirkumpolarstrom zulassen. Dazu wurden Untersuchungen an der Wassersäule, an Sinkstofffallenmaterial, am Oberflächensediment, Porenwasser und an langen Sedimentkernen durchgeführt. Untersuchungen zum gelösten Barium im Meerwasser auf zwei Profilen im westlichen Südatlantik zeigen, daß die Bariumkonzentrationen innerhalb des Antarktischen Zirkumpolarstromes im Vergleich zu anderen Ozeanen relativ hoch sind. Die verschiedenen Wassermassen werden von den Bariumgehalten nachgezeichnet, so daß an den ozeanegraphischen Fronten ähnlich wie bei anderen ozeanegraphischen Parametern ausgeprägte Gradienten auftreten. Die vertikale Verteilung gelösten Bariums innerhalb der Wassersäule korreliert mit der Verteilung gelösten Silikates, was auf eine Kopplung von Barium an den biogenen Stoffkreislauf schließen läßt. Das gelöste Barium wird von den Hartteilen absinkender Silikatschaler aufgenommen und in der unteren Wassersäule und im Sediment wieder freigesetzt. Die Barytsedimentation ist nicht abhängig vom Gehalt gelösten Bariums innerhalb der Wassersäule. Vielmehr ist das Auftreten von Diatomeen und eine hohe Exportproduktion bei der Bildung von Baryt entscheidend. Die Barytbildung scheint an den Abbau organischen Materials innerhalb der Wassersäule gekoppelt zu sein, da das Corg/Babio-Verhältnis in den Sinkstofffallen mit zunehmender Wassertiefe abnimmt. Die Zunahme biogenen Bariums mit der Wassertiefe, die sowohl in den Sinkstofffallen als auch in Oberflächensedimenten beobachtet wurde, verdeutlicht die große Stabilität von Barium in Form von Baryt im Vergleich zu organischem Kohlenstoff, Opal und Karbonat. Im Antarktischen Zirkumpolarstrom wird innerhalb der Antarktischen Zone mengenmäßig das meiste biogene Barium akkumuliert. Dieser Bereich ist ebenfalls durch eine hohe Opalakkumulation gekennzeichnet, die ihren Ausdruck in der Ausbildung des Opalgürtels um die Antarktis findet. Diese Übereinstimmung läßt daher eine Anwendung von Barium als Produktivitätsanzeiger möglich erscheinen. Die Primärproduktivitäten, welche mit Hilfe des Flusses von biogenem Barium bestimmt wurden, bewegen sich in der Antarktischen Zone um ca. 40 gC/m2/a und sind somit deutlich niedriger als z.B. in Küstenauftriebsgebieten. Im Wechsel von Warm- und Kaltzeiten lassen sich signifikante Änderungen der Bariumkonzentrationen feststellen. Eine diagenetische Überprägung des Bariumsignals durch Barytmobilisation und anschließender Wiederausfällung kann in den untersuchten Sedimentkernen ausgeschlossen werden. Die in den Oberflächenproben beobachtete Korrelation zwischen den Akkumulationen biogenen Bariums und biogenen Opals ist ebenfalls in den Kernprofilen nachvollziehbar, wodurch die Anwendung biogenen Bariums als Proxy für Paläoproduktivitäten in antarktischen Sedimenten möglich wird. Innerhalb der Antarktischen Zone werden während der Interglazialzeiten die höchsten Akkumulationsraten von biogenem Barium beobachtet, mit maximalen Werten während der Klimaoptima im Holozän und vor ca. 125.000 Jahren. Während der Warmzeiten war daher die Hochproduktionszone in der Antarktischen Zone ausgebildet. Dagegen kommt in den Kaltzeiten nördlich der Polarfront mehr biogenes Barium zur Akkumulation. Eine nordwärtige Verschiebung der Polarfront und damit des Hochproduktionsgürtels während der Glazialzeiten kann aber ausgeschlossen werden, da die Akkumulationsraten von biogenem Barium viel niedriger sind als die warmzeitliehen Raten innerhalb der Antarktischen Zone.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 105 Seiten , Illustrationen
    Serie: GEOMAR-Report 38
    Sprache: Deutsch
    Anmerkung: Zugleich: Dissertation, Universität Kiel, 1995 , Inhaltsverzeichnis Zusammenfassung Abstract 1. Einleitung 2. Untersuchungsgebiet 2.1 Bathymetrie und tektonischer Aufbau 2.2 Ozeanische Zirkulation 2.2.1 Subtropischer Wirbel 2.2.2 Antarktischer Zirkumpolarstrom 2.2.3 Weddellwirbel 2.3 Wassermassen 2.3.1 Oberflächenwassermassen 2.3.2 Tiefenwassermassen 2.3.3 Antarktisches Bodenwasser 2.4 Meereisverbreitung 3. Probenmaterial und Probennahme 3.1 Meerwasserproben 3.2 Sinkstoffallenmaterial 3.3 Oberflächensedimentproben 3.4 Sedimentkerne 3.4.1 Lithologien 3.4.2 Stratigraphie 3.4.3 Alters-Teufen-Beziehung und Sedimentationsraten 4. Analytik 4.1 Probenaufbereitung 4.2 Säureaufschluß 4.3 Analytische Verfahren 4.3.1 Bariumbestimmung an Wasserproben mittels Graphitrohrofen-Atomabsorptionsspektrometrie (GF-AAS) 4.3.2 Sulfatbestimmung an Porenwässern mittels Ionenchromatographie 4.3.3 Bariumbestimmung an Aufschlußlösungen mittels Atomemissionsspektrometrie (ICP-AES) 4.4 Berechnung von Akkumulationsraten 5. Biogener Anteil am Bariumgehalt der Sedimente 6. Gelöstes Barium in den Wassermassen des Antarktischen Zirkumpolarstromes 6.1 Ergebnisse zur Bariumverteilung innerhalb der Wassersäule 6.2 Gelöstes Barium im Vergleich zu gelöstem Silikat und zur Hydrographie 7. Bariumfluß zum Meeresboden und Bariumakkumulation im Oberflächensediment 7.1 Ergebnisse zur Verteilung von partikulärem Barium in der Wassersäule 7.2 Rezente Bariumverteilung in den Oberflächensedimenten 7.3 Abschätzung der holozänen Sedimentationsraten 7.4 Vergleich von biogenem Barium mit anderen Produktivitätsanzeigern 7.4.1 Partikuläres Barium in der Wassersäule 7.4.2 Rezente bis subrezente Bariumsedimentation 7.5 Abhängigkeit des biogenen Bariums im Sediment vom gelösten Barium in der Wassersäule 7.6 Abhängigkeit der Bariumakkumulation von der Wassertiefe 7.7 Bariumsedimentation in Beziehung zur Ozeanographie und zur Meereisverbreitung innerhalb des Antarktischen Zirkumpolarstromes 7.8 Fluß von biogenem Barium zur Berechnung von Exportproduktivitäten 8. Diagenese von Baryt in anoxischen Sedimenten 8.1 Ergebnisse zum Bariumgehalt im Porenwasser 8.2 Diagenetisch gebildeter Baryt 9. Barium im Wechsel der Glazial-nnterglazialzeiten 9.1 Ergebnisse zum Bariumgehalt in den Sedimentkernen 9.2 Akkumulationsraten biogenen Bariums 9.3 Vergleich der Akkumulationsraten von biogenem Barium mit dem Ba/Al-Verhältnis 9.4 Bariumakkumulationsraten im Vergleich zu anderen Produktivitätsanzeigern im östlichen Südatlantik 9.5 Berechnung der Paläoproduktivität 9.6 Paläozeanographie im östlichen Südatlantik 10. Schlußfolgerungen 11. Danksagung 12. Literaturverzeichnis Anhang Abbildungs- und Tabellenverzeichnis Figure and table captions
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  • 68
    Signatur: AWI P9-83-1080
    In: Prace naukowe Uniwersytetu Śląskiego
    Materialart: Monographie ausleihbar
    Seiten: 191 Seiten , Illustrationen, Karten
    ISBN: 83-00-00355-X
    Serie: Prace naukowe Uniwersytetu Śląskiego 543
    Sprache: Polnisch
    Anmerkung: Contents: Preface: Scientific activity of the Silesian University in the polar regions in 1977-1980. - PAPERS. - Ablation by calving and 20th century recession of glaciers in the Hornsund area (Spitsbergen). Preliminary results / Jacek Jania. - The occurence and origin of coarse crystalline calcite in the carbonate massiffs of Sørkappland (South Spitsbergen) / Łukasz Karwowski, Andrzej Kozik. - Surface run-off dynamics of the basin of the Nordfall Glacier steam (South Spitsbergen) / Jan Leszkiewicz. - Karst springs at the foot of Rasstupet wall in the South Spitsbergen in the investigations from 1978 / Jan Leszkiewicz. - Aeolian activity in the Gås Bay region (South Spitsbergen) / Tadeusz Szczypek. - Geomorphological activity of flowing waters on the Kaffiöyra plain (Spitsbergen) / Kazimierz Sendobry. - Preliminary characteristics of the basins in the vicinity of Henryk Arctowski Station on King George Island (South Shetlands) / Andrzej Kozik. - SCIENTIFIC DOCUMENTATION. - Meteorological investigations in South Spitsbergen in the summer of 1978. Specification / Andrzej Kaminski. - Meteorological materials collected in South Spitsbergen in the summer of 1979. Specification / Andrzej Kaminski. - Preliminary results of hydrological and hydrochemical investigations in Fugleberget basin (SW Spitsbergen) / Wiesława Krawczyk, Marian Pulina. - Karst springs at the foot of the Rasstupet wall. Specification of 1978-1979 / Jan Leszkiewicz, Jerzy Wach, Jan Waga. - Scientific publications from the polar expeditions of the Silesian University. , In polnischer Sprache , Zusammenfassung in englischer und russischer Sprache
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  • 69
    Signatur: ZSP-980-100
    In: ZfI-Mitteilungen, Nr. 100
    Materialart: Schriftenreihen ausleihbar
    Seiten: 184 Seiten , Illustrationen
    Serie: ZfI-Mitteilungen 100
    Sprache: Deutsch
    Anmerkung: Inhaltsverzeichnis: 15 Jahre Zentralinstitut für Isotopen- und Strahlenforschung der AdW der DDR / K. Wetzel. - Spurenanalyse mittels Ionisationsgasanalyse in der Mikroelektronik / H.-J. Große, P. Popp. - Beiträge der Isotopenforschung im ZfI zum Erkenntnisgewinn in den Geowissenschaften / R. Haberlandt, H. Schütze. - Radioisotopentechnik in der chemischen Industrie / G. Hoffmann. - EDV und moderne Informatik - wesentliche Elemente der Intensivierung des Forschungsprozesses im ZfI / L. Jankowski. - Nukleare Analyseverfahren in der Halbleiterindustrie / H. Koch. - Radionuklide in der Energetik / J. W. Leonhardt. - Ergebnisse der strahlenchemischen Grundlagenforschung und Entwicklungstendenzen der Strahlenchemie / W. Reicherdt. - Gewinnung von Wertmetallen aus Abprodukten / M. Rösseler. - Zur Isotopenproduktion am ZfI / G. Vormum.
    Standort: AWI Archiv
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  • 70
    Signatur: ZSP-167-65
    In: Berichte aus dem Sonderforschungsbereich 313, Veränderungen der Umwelt - Der Nördliche Nordatlantik, Nr. 65
    Materialart: Schriftenreihen ausleihbar
    Seiten: VIII, 131 Seiten , Illustrationen
    Serie: Berichte aus dem Sonderforschungsbereich 313, Veränderungen der Umwelt - Der Nördliche Nordatlantik 65
    Sprache: Deutsch
    Anmerkung: Zugl.: Kiel, Univ., Diss., 1996 , Inhaltsverzeichnis: 1 Einleitung. - 2 Grundlagen der Spektralanalyse. - 2.1 Begriffe. - 2.2 Auto-/Kreuzkovarianzfunktion - Auto-/Kreuzkorrelationsfunktion. - 2.3 Stationarität. - 2.4 Fourier-Transformation. - 3 Spektralanalyse univariater stationärer Prozesse. - 3.1 Autospektrum. - 3.2 Schätzen kontinuierlicher Autospektren. - 3.2.1 Spektraler Leckeffekt, Fensterfunktionen und Bandbreite. - 3.2.2 'Aliasing'-Effekte. - 3.3 Lomb-Scargle- (LS-) Methode: Fourier-Transformation nicht äquidistanter Daten. - 3.4 Thomson-Multitaper- (MT-) Methode. - 3.5 Blackman-Tukey- (BT-) Methode. - 4 Harmonische Analyse. - 4.1 Tests für harmonische Komponenten in weißem Rauschen. - 4.2 Tests für harmonische Komponenten in farbigem Rauschen. - 5 Spektralanalyse bivariater stationärer Prozesse. - 5.1 Kreuzspektrum. - 5.2 Kohärenzspektrum. - 5.3 Phasenspektrum. - 5.4 Hinweise zur Anwendung der BT- und LS-Methode. - 6 Datenvorbereitung. - 6.1 Interpolationsverfahren. - 6.2 Dezimierung. - 6.3 Tests auf Stationarität I Gegenmaßnahmen bei Nichtstationarität. - 7 Das Programm SPECTRUM. - 7.1 Allgemeines. - 7.2 Dateiformate. - 7.3 Benutzung. - 7.3.1 Univariate Spektralanalyse. - 7.3.2 Harmonische Analyse. - 7.3.3 Bivariate Spektralanalyse. - 7.3.4 Utilities. - 8 Spektralanalyse anhand von Beispielen. - 8.1 Autospektralanalyse künstlich generierter Zeitreihen. - 8.1.1 Autoregressiver Prozeß zweiter Ordnung. - 8.1.2 Varianzanteile harmonischer Signalkomponenten. - 8.1.3 Arbeitsbereiche bei der Spektralanalyse. - 8.1.4 Effekt eines linearen Trends. - 8.2 Autospektralanalyse paläoklimatischer Zeitreihen. - 8.2.1 δ180-Daten ODP Site 658. - 8.3 Harmonische Analyse anhand von Beispiele. - 8.3.1 Details zur praktischen Durchführung. - 8.3.2 Harmonische Analyse am Beispiel von Strontiumisotopenverhältnissen. - 8.3.3 Harmonische Analyse von Residuen. - 8.4 Kreuzspektralanalyse künstlich generierter Zeitreihen. - 8.4.1 Bivariater autoregressiver Prozeß erster Ordnung. - 8.4.2 Details zu Phasenspektren. - 8.5 Kreuzspektralanalyse paläoklimatischer Zeitreihen. - 8.6 Notwendige Angaben zur Beurteilung von Analyseresultaten. - 9 Evolutionäre Spektralanalyse nicht äquidistanter Zeitreihen. - 9.1 Allgemeines. - 9.2 Schätzung von Hüllkurven. - 9.2.1 Prinzip. - 9.2.2 Das Programm ENVELOPE. - 9.2.3 Plio-/Pleistozäne Entwicklung der 100 ka-Hüllkurve. - 10 Schlußfolgerungen. - 10.1 Methodik. - 10.2 Paläoklimatische Fragestellungen. - Literaturverzeichnis. - Anhang. - Danksagung.
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  • 71
    Signatur: AWI A13-19-92401
    Beschreibung / Inhaltsverzeichnis: The book "Mathematical modelling of general circulation of the atmosphere and ocean" (G. I. Marchuk, V. P. Dymnikov, V. N. Lykossov, V. B. Zalesny, V. Ya. Galin) contains the sistematic description of the mathematical and physical aspects of the problem of general circulation atmosphere and ocean modelling, beginning from the governing equations to the analysis of numerical experiments and programme realization on the different generation computers. The problems of sub-grid processes parametrization methods and the sensitivity of the models to the parametrization of the cloud-radiation interaction, large-scale condensation processes parametrization of the boundary layer are also considered in the book. The book is intended for the experts in numerical and applied mathematics, geophysical hydrodynamics as well as students of universities, concerned with numerical methods of the ocean and the atmosphere simulation.
    Materialart: Monographie ausleihbar
    Seiten: 320 Seiten , Illustrationen
    Sprache: Russisch
    Anmerkung: In kyrillischer Schrift
    Standort: AWI Lesesaal
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  • 72
    Monographie ausleihbar
    Monographie ausleihbar
    London : Academic Press
    Signatur: AWI Bio-19-92166
    Materialart: Monographie ausleihbar
    Seiten: 67 Seiten , Illustrationen
    Serie: Estuarine coastal and shelf science Vol. 46, Suppl. A
    Sprache: Englisch
    Anmerkung: Contents: Introduction / P. J. le B. Williams. - The management and behaviour of the Mesocosms / P. J. le B. Williams and J. K. Egge. - Evolution of phytoplankton pigments in Mesocosm experiments / R. G. Barlow, R. F. C. Mantoura, D. G. Cummings, D. W. Pond and R. P. Harris. - Ribulose-1,5-bisphosphate Carboxylase/oxygenase (RubisCO) gene expression and photosynthetic activity in nutrient-enriched Mesocosm experiments / M. Wyman, J. T. Davies, K. Weston, D. W. Crawford and D. A. Purdie. - Bacterial response to blooms dominated by diatoms and Emiliania huxleyi in nutrient-enriched Mesocosms / R. Sanders and D. A. Purdie. - Population dynamics of phytoplankton and viruses in a phosphate-limited Mesocosm and their effect on DMSP and DMS production / W. H. Wilson, S. Turner and N. H. Mann. - Microplanktonic polyunsaturated fatty acid markers: a Mesocosm trial / D. W. Pond, M. V. Bell, R. P. Harris and J. R. Sargent.
    Standort: AWI Lesesaal
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  • 73
    Monographie ausleihbar
    Monographie ausleihbar
    Palisades : Lamont-Doherty Geological Observatory, Columbia University
    Signatur: AWI G2-19-92382
    Materialart: Monographie ausleihbar
    Seiten: 690 Seiten , Illustrationen, Karten
    Sprache: Englisch
    Anmerkung: Table of Contents CHAPTER 1 INTERNAL CYCLING AND THROUGHPUT : Pathways from River Mouth to Sea Floor Depth Profiles of Sea Salt Composition Constituent Classification The Chemical Composition of Marine Organic Matter Composition of Particulate Matter Caught in Sediment Traps A Simple Model for Biologically Utilized CDnstituents The Distributions of Biointermediate Constituents Estimation of Input Rates Horizontal Segregation of CDnstituents in the Deep Sea Summary CHAPTER 2 THE SEDIMENTARY SINK Factors Influencing the Distribution of Sedimentary Constituents Introduction Sediment Types Distribution of Opal Production Opal Solution on the Sea Floor Distribution of Calcite in Marine Sediments Degree of Calcite Saturation Variation in the Carbonate Ion Content of Sea Water Spacial Variations in the CaC0 3 Saturation of Sea Water Factors Controlling the Rate of Calcite Solution Thickness and Shape of the Sublysocline Transition Zone Variation of Sediment Type with Time Manganese Nodules Summary CHAPTER 3 THE ATMOSPHERIC IMPRINT : The Cycles of Gases within the Sea Introduction Solubilities of Gases in Sea Water The Rate of Gas Exchange Stagnant Film Thickness Derived from Natural Radiocarbon Stagnant Film Thicknesses Determined by the Radon Method Oxygen Concentrations in Surface Ocean Water Oxygen Deficiencies in the Deep Sea The Marine N2O Cycle Excess Helium The Carbon Dioxide Content of Surface Ocean Water Origin of the Equatorial Pacific CO2 Anomaly Summary CHAPTER 4 REACTIVE METALS AND THE GREAT PARTICULATE SWEEP : The Cycle of Metals in the Sea Introduction Products of Uranium and Thorium Decay Thorium Isotopes in the Sea Protactinium-231 to Thorium-230 Activity Ratios The Distribution of Lead-210 The Distribution of Polonium-210 The Distribution of Radium-226 Anthropogenic Plutonium in the Sea Toward a Model of Metal Transport Distributions of Stable Metals in the Sea Stable Isotope Ratios in Reactive Metals Transport of Iron and Manganese in the Sea Lessons from Controlled Ecosystem Studies Distribution Coefficients Summary CHAPTER 5 HOW FAST DOES THE MILL GRIND? : Rates of Vertical Mixing and Sediment Accumulation Introduction Rate of Vertical Mixing Implication to the Distribution of Radium-226 Distribution of Radiocarbon in the Ocean Rate of Continental Runoff Sediment Accumulation Rates Radiocarbon Dating Uranium Series Dating Beryllium Dating Potassium-Argon Dating Agreement Among Dating Methods Comparison of Model and Observed Rates of CaC0 3 Solution Summary CHAPTER 6 WHAT KEEPS THE SYSTEM IN WHACK? : Control Mechanisms Operating in the Sea Introduction Phosphate Controls Silicate Controls Carbon Controls Interactions between the Phosphate and Carbon Controls Nitrate Controls Dissolved Oxygen Controls Major Anion Controls Major Cation Controls Possible Causes for Perturbations Recorders of Paleoocean Chemistry The Marine Geochemistry of Carbon-13 The Uranium Content of Coral Factors Influencing Nutrient Gradients in the Deep Sea Summary CBAPTER 7 FREIGHT TRAINS AND FICKIAN CONFUSION : The Movement of Water Through the Deep Sea Introduction Types of Motion One Dimensional Advection - Diffusion Model Tracers for Diapycnal and Isopycnal Mixing Mixing Rates Based on Radon-222 and Radium-228 The Distribution of Helium-3 in the Deep Pacific Sources of Deep Water Northern Component Water Conservative Properties of NCW Initial Radiocarbon to Carbon Ratio in NCW Feed for NCW Production Southern Component Water Ventilation of the Deep Atlantic Ocean Ventilation of the Deep Pacific and Indian Oceans The Grand Cycle of Radiocarbon in the Deep Ocean Biological Short-Circuiting Temporal Variations in Radiocarbon Production Argon-39 Summary CHAPTER 8 THE ANTHROPOGENIC INVASION : The Movement of Water Through the Oceanic Thermocline Introduction Input Functions Hydrology of the Main Thermocline Tritium Distribution within the Thermocline Temporal Trends in Tritium Tritium as a Guide to Deep Water Formation Supplementary Information from Strontium-90 Bomb Carbon-14 Distribution within the Thermocline Explanations for Low Equatorial Bomb Carbon-14 Inventories Implications of Equatorial Upwelling to the Tritium Budget An Upwelling Rate Based on the Equatorial CO2 Anomaly Helium-3 Distribution in the Main Oceanic Thermocline Purposeful Tracers Summary CHAPTER 9 ICE SHEETS AND OCEAN PHOSPHATE : Glacial to Interglacial Changes in Ocean Chemistry Introduction Temperature and Salinity Changes Formation and Destruction of Organic Materials Changes in CaCO3 Storage Evidence for an Early Post-Glacial Lysocline Change Changes in Phosphate Concentration The Combined Evidence from Deep Sea Cores Cause of the Oceanic Phosphate Change An Alternate Scenario Wrap Up of the CO2 Record The Oxygen Record Glacial to Interglacial Changes in Ocean Mixing Rate Glacial to Interglacial Lysocline Changes Changes in the Distribution of Nutrients in the Deep Sea Summary CHAPTER 10 CAN MAN OVERRIDE THE CONTROLS? : The Buildup of Fossil Fuel CO2 in the Atmosphere and Oceans Introduction CO2 Production in the Past CO2 Production in the Future Capacity of the Sea for Fossil Fuel CO2 Uptake Utilizable Capacity - Simplified Calculation Utilizable Capacity - Rigorous Calculation Kinetics of Fossil Fuel CO2 Uptake by the Sea Numerical Model crosschecks on the Validity of the Numerical Model Prediction of Future CO2 Levels Solution of Sea Floor Calcite Summary REFERENCES, CONSTANTS, DEFINITIONS, ABBREVIATIONS AND INDEX Introduction to the References Subject Outline for the References Annotated Reference List Frequently Used Constants Definitions of Isotope Notations Abbreviations Index Foldout Caption
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  • 74
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Bremerhaven : Alfred Wegener Institut for Polar and Marine Research
    Dazugehörige Bände
    Signatur: ZSP-994(1994/1995)
    In: Zweijahresbericht / Stiftung Alfred-Wegener-Institut für Polar- und Meeresforschung, 1994/1995
    Materialart: Schriftenreihen ausleihbar
    Seiten: 275 Seiten , Illustrationen
    ISSN: 0940-4546 , 1618-3703
    Serie: Zweijahresbericht / Stiftung Alfred-Wegener-Institut für Polar- und Meeresforschung 1994/1995
    Sprache: Englisch
    Anmerkung: Contents 1. Introductory overview 2. Selected research topics Food availability and microbial activity on the continental slope: from the Siberian shelf to the Arctic basin (Boetius, Damm, Nothig) Ecology of summer sea ice (Cieitz, Kukert, Riebesell, Rutgers v. d. Loeff, Crossmann, Dieckmann) Temperature physiology of marine invertebrates and fish (Hardewig, Sartoris, Sommer, van Dijk, Zielinski, Partner) The 'multistoried' habitat on the Antarctic sea floor (Cutt) The near-surface air flow at Neumayer Station (Handorf) Simulation of atmospheric climate processes over the Arctic (Dethloff, Rinke) Coordinated ozone soundings for determination of ozone depletion rates in the Arctic and sub-Arctic winter (Rex, van der Cathen) Sunshine Simulation (Tüg) Ice-free areas in pack ice - The Northeast Water Polynya in the Greenland Sea (Budeus, Schneider, Kattner, Hirche) Exchange of deep water across the Greenland-Iceland-Scotland sills (Beckmann, Doscher) The large-scale distribution of inorganic carbon in the Atlantic sector of the Antarctic (Hoppema, Fahrbach) Modelling the circulation under the Filchner-Ronne Ice Shelf (Determann, Cerdes, Crosfeld) Filchner-Ronne Ice Shelf Programme (FRISP) (Oerter, Mayer, Hempel, Lambrecht, Nixdorf) Plate tectonics in the Bellingshausen Sea, Southeast Pacific (Cohl, Nitsche, Miller) Small-scale structures from multibeam bathymetry in the Weddell Sea (Schenke, Kuhn) Radiolarians as a paleothermometer in the Southern Ocean - reconstruction of climatic changes (Abelmann, Brathauer, Sieger) Sibiria: Region of origin for Arctic sediments (Rachold, Hoops, Hubberten) Late and postglacial vegetation and climate history of northern Central Siberia (Hahne, Harwart) SEPAN (Sediment and Paleoclimate Data Network) (Diepenbroek, Crobe, Reinke, Schlitzer, Sieger, Siems) 3. Reports by the Scientific Sections 3.1 Oceanic and atmospheric processes in polar regions 3.2 Modelling of ocean processes and circulation 3.3 Marine physics and instrument development 3.4 The bedrock of the polar regions in the Atlantic and the surrounding continental margin 3.5 Glaciology 3.6 Marine geology 3. 7 Marine ecosystem research and ecophysiology 3.8 Biological oceanography 3.9 Ceoscientific studies in ice-margin regions 3.10 Physics and chemistry of the polar atmosphere 3.11 Sea-ice research 3.12 The oceanic carbon cycle 4. Large equipment, expeditions and land-based stations 4.1 'Polarstern' 4.2 'Victor Hensen' 4.3 Polar Aircraft 4.4 Land Expeditions 4.5 Neumayer Station 4.6 Dallmannn Laboratory 4.7 Koldewey Station 4.8 Other small stations 5. Logistics 6. International and National Cooperation 6.1 National Cooperation 6.2 International Cooperation 7. Central Facilities 7.1 Computer Centre 7.2 Libraries 7.3 Public Relations 8. Personnel Structure and Budget Trends 8.1 Staff plan 8.2 Budget 8.3 On the Situation of Women at the AWl 9. Publications 9.1 Publications of the Institute 9.2 Publications of the Staff Annex I. Staff II. Scientific Events Ill. Completed Theses and Dissertations IV 'Polarstern' Expeditions , Inhaltsverzeichnis 1. Einleitende Übersicht 2. Ausgewählte Forschungsthemen Vom sibirischen Schelf zur arktischen Tiefsee: Nahrungsverfügbarkeit und mikrobielle Aktivität am Meeresboden (Boetius, Damm, Nöthig) Zur Ökologie des sommerlichen Meereises (Gleitz, Kukert, Riebesell, Rutgers v. d. Loeff, Grossmann, Dieckmann) Temperaturphysiologie von marinen Invertebraten und Fischen (Hardewig, Sartoris, Sommer, van Dijk, Zielinski, Pörtner) Der "mehrstöckige" Lebensraum am Meeresboden der Antarktis (Gutt) Die bodennahe Luftströmung an der Neumayer-Station (Handorf) Die Simulation atmosphärischer Klimaprozesse über der Arktis (Dethloff, Rinke) Koordinierte Ozonsondierungen zur Bestimmung des Ozonabbaus im arktischen und subarktischen Winter (Rex, von der Gathen) Der Sonnenscheinsimulator (Tüg) Eisfreie Stellen im Packeis - Die Nordostwasser-Polynja in der Grönlandsee (Budeus, Schneider, Kattner, Hirche) Der Austausch von Tiefenwasser über die untermeerischen Schwellen zwischen Grönland und Schottland (Beckmann, Döscher) Die großräumige Verteilung des anorganischen Kohlenstoffs im atlantischen Sektor der Antarktis (Hoppema, Fahrbach) Modeliierung der Ozeanzirkulation unter dem Filchner-Ronne-Schelfeis (Determann, Gerdes, Grosfeld) Das Filchner- Ronne-Schelfeis-Projekt (Oerter, Mayer, Hempel, Lambrecht, Nixdorf) Die Plattentektonik des Bellingshausenmeeres (Gohl, Nitsche, Miller) Entdeckung neuer Strukturen auf dem Meeresboden des südlichen Weddellmeeres (Schenke, Kuhn) Radiolarien als Paläothermometer im Südpolarmeer (Abelmann, Brathauer, Sieger) Sibirien: Ursprungsregion arktischer Sedimente (Rachold, Hoops, Hubberten) Spät- und postglaziale Vegetations- und Klimageschichte des nördlichen Mittelsibiriens (Hahne, Harwart) Informationssystem SEPAN (Sediment and Paleoclimate Data Network) (Diepenbroek, Grobe, Reinke, Schlitzer, Sieger, Siems) 3. Berichte der wissenschaftlichen Arbeitsgruppen 3.1 Ozeanische und atmosphärische Prozesse in den Polargebieten 3.2 Modellierung von Prozessen und Zirkulationssystemen im Ozean 3.3 Meeresphysikalische Messungen und Instrumentenentwicklung 3.4 Der Untergrund der polaren Teile des Atlantik und seiner kontinentalen Umrandung 3.5 Glaziologie 3.6 Meeresgeologie 3.7 Marine Ökosystemforschung und Ökophysiologie (Sektion Biologie I) 3.8 Biologische Meereskunde (Sektion Biologie II) 3.9 Geowissenschaftliche Studien in Eisrandgebieten 3.10 Physik und Chemie der polaren A tmosphäre 3.11 Meereisforschung 3.12 Der Kohlenstoffkreislauf 4. Großgeräte, Expeditionen und Landstationen 4.1 "Polarstern" 4.2 "Victor Hensen" 4.3 Polarflugzeuge 4.4 Landexpeditionen 4.5 Neumayer-Station 4.6 Dallmann-Laboratorium 4.7 Koldewey-Station 4.8 Weitere kleine Stationen 5. Logistik 6. Internationale und nationale Zusammenarbeit 6.1 Nationale Zusammenarbeit 6.2 Internationale Zusammenarbeit 7. Zentrale Einrichtungen 7.1 Rechenzentrum 7.2 Bibliothek 7.3 Presse-und Öffentlichkeitsarbeit 8. Personeller Aufbau und HaushaItsentwicklung 8.1 Personal 8.2 Haushalt 8.3 Bericht der Frauenbeauftragten 9. Veröffentlichungen 9.1 Veröffentlichungen des Instituts 9.2 Veröffentlichungen der Mitarbeiter Anhang I. Personal II. Wissenschaftliche Veranstaltungen III. Abgeschlossene Examensarbeiten IV. "Polarstern"-Expeditionen
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  • 75
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-83/18
    In: CRREL Report, 83-18
    Beschreibung / Inhaltsverzeichnis: An evaluation of an impulse radar system for detecting cavities under concrete pavement is discussed, and field results are presented. It was found that a dual antenna mode of surveying was ideal for void detection. In this mode one antenna operated in a transceive mode and a second, offset from the first, operated in a receive-only mode. This arrangement allowed a refraction-type profile survey to be performed, which enabled subpavement voids to be easily detected. Field trails were held at Plattsburgh Air Force Base, where 28 cavities were detected and mapped. Drilling of holes verified that a cavity existed and allowed cavity depth to be measured. The cavities varied from 1.5 in. to 23 in, depth and were up to 20 ft. long.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 49 Seiten , Illustrationen
    Serie: CRREL Report 83-18
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Plattsburgh Air Force Base Radar sounding system Survey procedure Cavity inspection Radar cavity detection test Radar profile results Falling-weight deflectometer tests Discussion and conclusions Literature cited
    Standort: AWI Archiv
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  • 76
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-83/13
    In: CRREL Report, 83-13
    Beschreibung / Inhaltsverzeichnis: A review on past experimental and theoretical work indicates a need for additional experimentation to characterize the response of snow to inelastic pressure waves. Pressure data from previously conducted explosion tests are analyzed to estimate the elastic limit of snow of 400 -kg/cu m density to be about 36 kPa. This pressure corresponds to a scaled distance of 1.6 m/cu.rt.kg for charges fired beneath the surface of the snow, and to a scaled distance of 1.2 m/cu.rt.kg for charges fired in the air. The effects of a snow cover on the method of clearing a minefield by using an explosive charge fired in the air above the snow surface are also discussed and recommendations are given for further work in this area. Explosive pressure data are used to estimate the maximum effective scaled radius for detonating buried mines at shallow depth to be 0.8 m/cu.rt.kg. Fuel-air explosive will increase this effective radius significantly because of the increase in the size of the source region.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 33 Seiten , Illustrationen
    Serie: CRREL Report 83-13
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface List of symbols Introduction Objectives Background Problems in describing the response of snow to an applied stress Methods of determining the dynamic behavior of materials Review of previous studies on snow Experimental measurements on snow Summary of snow experiments Theoretical studies Confirmation of the theory Discussion Applications Recommendations Summary Literature cited Appendix A. Selected data from Wisotski and Snyder (1966) Appendix B. Pressure data from Livingston (1964)
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  • 77
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-84/18
    In: CRREL Report, 84-18
    Beschreibung / Inhaltsverzeichnis: This report investigates the influences of turbulence and water temperature on frazil ice formation. The rate and thequantity of frazil ice formed in a specified volume of supercooled water increase with both increasing turbulence inten-sitv and decreasing water temperature. The influence of turbulence intensity on the rate of frazil ice formation, how-ever. is more pronounced for larger initial supercooling. The turbulence characteristics of a flow affect the rate offrazil ice formation by governing the temperature to which the flow can be supercooled, by influencing heat transferfrom the frazil ice to surrounding water, and by promoting collision nucleation, particle and floc rupture and increasingthe number of nucleation sites. larger frazil ice particles formed in water supercooled to lower temperatures. The par-ticles usually were disks, with diameters several orders greater than their thickness. Particle size generally decreased with increasing turbulence intensity. This report develops an analytical model, in which the rate of frazil ice formation isrelated to temperature rise of a turbulent volume of water from the release of latent heat of fusion of liquid water toice. Experiments conducted in a turbulence jar with a heated, vertically oscillating grid served both to guide and tocalibrate thanalytical'model as well as to afford insights into frazil ice formation. The formation of frazil ice wasstudied for Vemperatures of supercooled water ranging from -0.9° to -0.050°C.
    Materialart: Schriftenreihen ausleihbar
    Seiten: vi, 50 Seiten , Illustrationen
    Serie: CRREL Report 84-18
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Nomenclature Introduction Background Scope of study Literature review Introduction Incipient formation of frazil ice Particle size and evolution of frazil ice Influences of turbulence and water temperature on the rate of frazil ice formation Conclusions Analytical model Introduction Elements of heat transfer Elements of turbulence Experimentation Experimental apparatus Experimental procedure Results Introduction Nucleation of frazil ice Influences of turbulence on frazil ice formation Water temperature Influences of water temperature and turbulence on the concentration of frazil ice Frazil ice particle shape and size Conclusions Literature cited Appendix A: Preliminary frazil ice experiments Flume experiments Couette-flow Appendix B: Listing of computer program for calculation of frazil ice formation Appendix C: Water temperature rise attributable to frazil ice formation as computed usingthe analytical model .
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  • 78
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-82/23
    In: CRREL Report, 82-23
    Beschreibung / Inhaltsverzeichnis: A direct filtration, water treatment pilot plant was operated on the Kenai River at Soldotna, Alaska, during the summer of 1980. The purpose of the pilot plant operations was to determine the feasibility of the direct filtration process for removal of glacial silt. The major criterion used to determine feasibility was production of water containing less than 1.0 NTU of turbidity. For the range of raw water turbidities encountered (22-34 NTU), the pilot plant testing indicated that direct filtration was feasible and could be considered as an alternative to conventional waiter treatment plants containing sedimentation tanks.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 26 Seiten , Illustrationen
    Serie: CRREL Report 82-23
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Conversion factors: U.S. customary to metric Introduction Glacial characteristics Water treatment Materials and methods Experimental design Pilot plant intake Hydrocyclone Chemical addition system Flocculation system Filtration system Pilot plant operations Coagulant chemical preparations Flow measurement Sampling Results and discussion Kenai River w ater quality Evaluation of pilot plant testing Performance of pilot plant elements Physical and chem ical variables Conclusions Recommendations Literature cited
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  • 79
    Signatur: ZSP-980-70
    In: 2nd Working Meeting "Radioisotope Application and Radiation Processing in Industry", Part 2, 50 to 97
    In: ZfI-Mitteilungen, Nr. 70
    Materialart: Schriftenreihen ausleihbar
    Seiten: 355 Seiten , Illustrationen
    ISSN: 0323-8776
    Serie: ZfI-Mitteilungen 70
    Sprache: Englisch
    Anmerkung: Contents of Part 2 Hecht, K. Gerber, R. Otto: Studies on the drying of paints by means of 14C-labelled compounds K. Wagner, F. Brutschin, I. Ritter, T. Gritsch, H. Zimmermann, H. Borchert: Investigations by the aid of radioisotope methods on the technology of the production of carbon and silicon carbide materials K. Gloe, P. Mühl: Determination of metal extraction process parameters using tracer technique W. Migdał, W. Łada, K. Malec-Czechowska: Studies on liquid-liquid extraction of noble metals using radiotracers L. Petryka, K. Przewłocki: Radiotracer investigations of benefication copper ore in the industrial flotation process Z. Bazaniak, J. Palige: Determination of Cu recovery degree from slags in shaft process by means of radiotracers R. Burek, J .K. Zurawicz: On the optimization of concentration measurements in heterogeneous materials based on β-backscatter measurements B. Heinrich: Analysis of carbon content in crude brown coal by inelastic scattering of neutrons and the method of time correlated associated particles P. Urbańaki, D. Wagner, M. Jankowska, E. Kowalska: Determination of calcium and iron and measurements of ash content in the brown coal H.-W. Thümmel: Some considerations relating to the prediction of the efficiency of radiometric methods for the continuous ash content determination of coal L. Wawrzonek: Monitor of ash content of coal with X-ray source I. Pavlicsek, V. Stenger, A. Veres: Apparatus for gamma activation analysis I. Végvári, I. Juhász: Determination of PbO content of lead-glass samples on the ground of gamma-absorption E. Schöntube, H.-J. Große: Aerosol ionization gas analysis as a monitoring for waste halothane in the atmosphere of operating theatre S. Mothes, P. Popp, G. Oppermann, W.-D. Herberg: Measurement of fluorocarbons with the ECD P. Popp, E. Schöntube, G. Oppermann: The usability of radiation ionization detectors for the determination of N2O concentrations in the air of operating theatres P. Popp, G. Arnold, G. Oppermann: A hydrocarbon-sensitized argon ionization detector for the detection of inorganic compounds R. Szepke, W. Lisieski, J. Harasimczuk: Automatic dust monitor AMIZ G. Vormum: Sealed sources - problems of design, measurement and quality control L. Gąsiorowski: New trends in developments of ratioisotope gauges in Poland G. Brunner: Direct chemical information from special radio tracers as well as from outer X-ray excitation J. Hirling: Experience and future trend in industrial application of nuclear methods in Hungary I. N. Ivanov, O. K. Nikolaenko, Yu. V. Phecktistov, V. L. Chulkin: Use of short-lived nuclides in activation analysis Kl.-P. Rudolph, J. Flachowsky, A. Lange: Trace element determination in semiconducter selenium by neutron activation analysis (NAA) W. Lisieski, J. Mirowicz: Some industrial applications of instruments with neutron sources R. Dybczyński, H. Maleszewaka, S. Sterliński, Z. Szopa, M. Wasek: Some problems in neutron activation determination of gold and silver in ores and concentrates of copper industry L. Jankowski: Cost-benefit aspects of radioisotope application in industry B. Manouchev, T. Boschkova, L. Tsankov, V. Gurev, I. Kojucharov, G. Grozev: On the possibilities of the direct gamma-spectremetry in natural waters P. Morgenstern, D. Müller, W. Riedel: A parallel grid proportional scintillation counter for the X-ray region from 3 to 20 keV with regard to high count rates N. A. Anders, V. S. Isaev, V. I. Filatov, B. E. Kolesnikov, D. Müller, P. Morgenstern, W. Riedel, V. P. Varvaritsa: X-ray fluroescence analyzer of light elements with proportional scintillation counter D. Müller, P. Morgenstern, W. Riedel, W. Warwariza, B. E. Kolesnikow, N. A. Anders, W. J. Filatov: General considerations concerning the use of the X-ray analyzer "RALE" in industry
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  • 80
    Monographie ausleihbar
    Monographie ausleihbar
    Bern : Schweizerische Kommission für Polarforschung SKP
    Signatur: AWI P7-20-93625
    Materialart: Monographie ausleihbar
    Seiten: 4, 4,IV Seiten , Illustrationen , 1 Beilage
    Sprache: Deutsch , Französisch
    Standort: AWI Lesesaal
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  • 81
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-83/9
    In: CRREL Report, 83-9
    Beschreibung / Inhaltsverzeichnis: Recent observations of shore ice pile-up and ride-up along the coast of the Alaska Beaufort Sea are presented. Information is given to show that sea ice movement on shore has overridden steep coastal bluffs and has thrust inland over 150 m, gouging into and pushing up mounds of beach sand, gravel, boulders and peat and, inland, the tundra material. The resulting ice scar morphology was found to remain for tens of years. Onshore ice movements up to 20 m are relatively common, but those over 100 m are very infrequent. Spring is a dangerous time, when sea ice melts away from the shore, allowing ice to move freely. Under this condition, driving stresses of less than 100 kPa can push thick sea ice onto the land.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 59 Seiten , Illustrationen
    Serie: CRREL Report 83-9
    Sprache: Englisch
    Anmerkung: Contents Abstract Preface Introduction Winter 1979-80 observations Winter 1980-81 and summer 1981 observations Winter 1981-82 and summer 1982 observations Old ice ride-up features Discussion Literature cited Appendix A. The boulder rampart and rock littered shore west of Konganevik Pt. Appendix B. Site location maps
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  • 82
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-83/6
    In: CRREL Report, 83-6
    Beschreibung / Inhaltsverzeichnis: During the austral summers of 1976-77 and 1978-79, several ice cores were taken from the McMurdo Ice Shelf brine zone to investigate its thermal, physical and chemical properties. This brine zone consists of a series of super-imposed brine layers (waves) that originate at the seaward edge of the ice shelf and migrate at various rates, depending upon their age and position in the ice shelf. The brine in these layers becomes increasingly concentrated as the waves migrate inland through the permeable ice shelf firn. Chemical analyses of brine samples from the youngest (uppermost) brine wave show that it contains sea salts in normal seawater proportions. Further inland, deeper and older brine layers, though highly saline (S 〉 200 ‰), are severely depleted in SO2-4 with the SO2-4/Na+ ratio being an order of magnitude less than that of normal seawater. Analyses of Na+, K+, Ca2+, Mg2+, SO2-4 and CI-, together with solubility and temperature considerations, show that the sulfate depletion is due to selective precipitation of mirabilite, Na2SO4*10H2O. The location of the inland boundary of brine penetration is closely related to the depth at which the brine en-counters the firn/ice transition. However, a small but measurable migration of brine is still occurring in otherwise impermeable ice; this is attributed to eutectic dissolution of the ice by concentrated brine as it moves into deeper and warmer parts of the McMurdo Ice Shelf.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iii, 16 Seiten , Illustrationen
    Serie: CRREL Report 83-6
    Sprache: Englisch
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  • 83
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-83/7
    In: CRREL Report, 83-7
    Beschreibung / Inhaltsverzeichnis: Peak power generation with hydropower creates tailwater flow conditions characterized by high and low flows with abrupt transitions between these states. Flows occurring in tailwaters typically form sharp-fronted, large-amplitude waves of relatively short period. An understanding of the mechanics of downstream propagation of these waves is important both for direct application in studies of the tailwater and because of the similarity of these waves to those following a dam break. An analysis of the dynamic equations of open channel flow is used to quantify the relative importance of flow wave convection, diffusion and dispersion in rivers. The relative importance of each process is re­lated to the relative magnitude of terms in the dynamic equations, providing a physical basis for model formulation. A one-dimensional diffusion wave flow routing model, modified for tailwaters, simulates the important physical pro­cesses affecting the flow and is straightforward to apply. The model is based upon a numerical solution of the kine­matic wave equation. The “modified equation,” Hirt, and von Neumann analyses are used to gain insight into the stability and dissipative and dispersive behavior of the numerical solution, and results of these analyses are compared. A set of linear routings is used to demonstrate the dissipative and dispersive behavior predicted by the analyses and to verify the accuracy of an expression that quantifies the numerical diffusion of the model. The analyses provide a basis for selection of numerical parameters for model applications. The capability and accuracy of the model are enhanced when physical wave diffusion is balanced by numerical diffusion in the model. Maintaining the diffusion balance re­quires that the time derivative weighting parameter 0 be variable and in some instances negative. Though some amount of phase error is introduced, negative 0 values have no adverse effect upon model stability. Field studies were con­ducted to demonstrate the benefits of careful model development and analysis, and to verify the diffusion wave model for rapidly varying tailwater flow. The bed slope and roughness characteristics of the field study reaches (below Apalachia and Norris Dams) differ greatly, spanning those of a large number of rivers of practical interest. The accurate simulation of flow in both of these tailwaters attests to the soundness of both the physical basis of the model and the numerical solution technique. The field studies confirm, for the extreme case of rapidly varying flow in a mildly sloped river, that inertia has a negligible effect upon unsteady flow waves at low Froude numbers. Additionally, these studies verify that diffusion of short-period waves in rivers is generally significant.
    Materialart: Schriftenreihen ausleihbar
    Seiten: vi, 41 Seiten , Illustrationen
    Serie: CRREL Report 83-7
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Nomenclature Introduction Physical diffusion and dispersion in open channel flow Modeling approach Description of the diffusion wave flow routing model Analysis of the numerical model Modified equation and Hirt analyses of diffusion wave model von Neumann analysis of the diffusion wave model Linear case studies Accuracy considerations of the numerical solution Field studies Apalachia Dam tailwater Norris Dam tailwater Conclusions Literature cited
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  • 84
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-83/5
    In: CRREL Report, 83-5
    Beschreibung / Inhaltsverzeichnis: This report presents the results of dynamic ice-structure interaction model tests conducted at the CRREL Ice Engineering Facility. A flexible, single-pile, bottom-founded offshore structure was simulated by a test pile with about a one-to-ten scale ratio. Urea (instead of sodium chloride) was used as dopant to scale down the ice properties, resulting in good model ice properties. Six ice fields were frozen and 18 tests carried out. In all cases distinctive dynamic ice structure interaction vibrations appeared, from which abundant data were collected. In tests with linear ice velocity sweep, sawtooth-shaped ice force fluctuations occurred first. With increasing velocity the natural modes of the test pile were excited, and shifts from one mode to another occurred. The maximum ice force values appeared mostly with low loading rates, but high forces appeared random'y at high ice velocities. As a general trend, ice force maximums, averages and standard deviations decreased with increasing ice velocities. The aspect ratio effect of the ice force in continuous crushing follows the same dependence as in static loadings. The frequency of observed ice forces is strongly dominated by the natural modes of the structure. Dynamically unstable natural modes tend to make the developing ice force frequencies the same as the natural frequencies. Otherwise the resulting frequency depends directly on structural stiffness and ice velocity and inversely on the ice force range. During vibrations the displacement rates of the structure overcome the velocity of ice, making low loading rates and hence high ice forces possible. During crushing, ice induces both positive and negative damping.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 53 Seiten , Illustrationen
    Serie: CRREL Report 83-5
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Test arrangements Ice properties Crushing patterns Maximum ice force vs velocity Dynamic aspect ratio effect and crushing strength Measured ice force frequencies Calculated ice force frequencies Accelerations, velocities and displacements Damping Ice-induced negative damping Limit cycles Buckling load Conclusions Literature cited
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  • 85
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-82/13
    In: CRREL Report, 82-13
    Beschreibung / Inhaltsverzeichnis: Frost heave is analyzed for the common case in which some ice penetrates the soil. In this situation, heave is due to the accumulation of soil-free ice just within the frozen zone, behind a frozen fringe of finite thickness. Heat and mass transport within and across that fringe are crucial processes in the dynamics of heave. This analysis concentrates on activity within the fringe, also connecting that activity to heat and mass flows in the more frozen and unfrozen zones. Each component in a set of governing differential equations is developed from rational physics and thermodynamics, using previous experimental work. It is assumed that the soil ice grows through interconnected interstices; hence it constitutes and can move as a rigid body. When the assumption is translated into mathematical terms, it completes the governing equations. The model resulting from these considerations is a one-dimensional finite element computer program that solves the equations for arbitrary initial and boundary conditions. The model is used to simulate the heave history of a hypothetical soil column frozen unidirectionally and subjected to a surcharge. The results are gratifying in that they predict qualitatively the characteristics of numerous laboratory observations. Some questions about the completeness of the theory remain, and strict verification of the model awaits further experimentation and better parameter identification.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iii, 11 Seiten , Illustrationen
    Serie: CRREL Report 82-13
    Sprache: Englisch
    Standort: AWI Archiv
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  • 86
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-82/11
    In: CRREL Report, 82-11
    Beschreibung / Inhaltsverzeichnis: The purpose of this investigation was to provide data to be used in evaluating the effects of winter navigation on pro­cesses that cause bank erosion. The specific objectives were to document bank conditions and erosion sites along the rivers, to monitor and compare the amounts of winter and summer bank recession and change, and to estimate the amount of recession that occurred prior to winter navigation. Shoreline conditions and bank recession were documented during field surveys each spring and fall. Bank changes were evaluated by comparison to observations from a previous survey. Aerial photointerpretation was done to estimate the amount of bank recession that occurred prior to winter navigation. Three hundred forty-five miles of river shoreline were surveyed. Banks were eroding along 21.5 miles (6.2%). The common types of bank failures were soil falls (sloughing) and block sliding and slumping. The erosion along approxi­mately 15 miles (70%) of the 21.5 miles was occurring along reaches not bordering winter navigation channels.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 75 Seiten , Illustrationen
    Serie: CRREL Report 82-11
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Previous investigations Approach Shoreline conditions Bank changes Bank recession before winter navigation St. Marys River Bank changes Bank recession before winter navigation St. Clair River Bank changes Bank recession before winter navigation Detroit River Bank changes Bank recession before winter navigation St. Lawrence River Bank changes Historical bank recession Summary and conclusions Literature cited Appendix A: St. Marys River Appendix B: St. Clair River Appendix C: Detroit River Appendix D: St. Lawrence River
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  • 87
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-82/40
    In: CRREL Report, 82-40
    Beschreibung / Inhaltsverzeichnis: The use of explosives to break floating ice sheets is described, and test data are used to develop design curves that predict explosives effects as ice thickness, charge size, and charge depth vary. Application of the curves to practical problems is illustrated by numerical examples. The general features of underwater explosions are reviewed and related to ice blasting. Quasi-static plate theory is considered, and is judged to be inapplicable to explosive cratering of ice plates. The specific energy for optimized ice blasting is found to compare quite favorably with the specific energy of icebreaking ships. All available field data for ice blasting are tabulated in appendices, together with details of the re­gression analyses from which the design curves are generated.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 68 Seiten , Illustrationen
    Serie: CRREL Report 82-40
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction General behavior of underwater explosions Regression analysis for ice-blasting data General features of the regression curves Use of the regression curves as design curves for ice blasting Row charges and pattern charges Response of floating ice sheets to underwater explosions Specific energy and “powder factor” Summary and conclusions Literature cited Appendix A: Basic data on ice blasting Appendix B: Scaled input data Appendix C: Initial regression analysis using complete polynomial Appendix D: Regression analysis with two coefficients of the original poly­nomial deleted
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  • 88
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-83/16
    In: CRREL Report, 83-16
    Beschreibung / Inhaltsverzeichnis: The presence of snow on the ground can impose limitations on the mobility of wheeled and tracked vehicles. Snow depth and density are the two most easily measured snow properties that can be related to mobility over snow. Existing models of snowpack accumulation and ablation processes and models of internal snowpack structure were examined to determine if a model of the snowpack can be developed for use in predicting the snow parameters that affect mobility. Simple models, such as temperature index models, do not provide sufficient snowpack details, and the more detailed models require too many measured inputs. Components of the various models were selected from a basis of a snowpack model for predicting snow properties related to mobility over snow. Methods of obtaining the input data from some components are suggested, and areas where more development is needed are described.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 34 Seiten , Illustrationen
    Serie: CRREL Report 83-16
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Nomenclature Conversion of metric units Introduction Review of existing models Accumulation models Ablation models Using existing models for studying mobility Proposed snowpack model for mobility studies Model components Implementation of the model Developing input data Conclusions Literature cited
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  • 89
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-83/23
    In: CRREL Report, 83-23
    Beschreibung / Inhaltsverzeichnis: The problems associated with measuring stresses in ice are reviewed. Theory and laboratory test results are then presented for a stiff cylindrical sensor made of steel that is designed to measure ice stresses in a biaxial stress field. Loading tests on freshwater and saline ice blocks containing the biaxial ice stress sensor indicate that the sensor has a resolution of 20 kPa and an accuracy of better than 15% under a variety of uniaxial and biaxial loading conditions. Principal stress directions can also be determined within 5 degrees. The biaxial ice stress sensor is not significantly affected by variations in the ice elastic modulus, ice creep or differential thermal expansion between the ice and gauge. The sensor also has a low temperature sensitivity (5 kPa/deg C).
    Materialart: Schriftenreihen ausleihbar
    Seiten: 38 Seiten , Illustrationen
    Serie: CRREL Report 83-23
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Previous work Stress measurements Design considerations Stress sensors Biaxial ice stress sensor Biaxial stress sensor theory Gauge deformation Stresses associated with cylindrical sensors Determination of ice stresses Gauge calibration Evaluation of the biaxial ice stress sensor Temperature sensitivity Biaxial loading test equipment Biaxial loading test results Differential thermal expansion Long-term drift Discussion of test results Conclusions Literature cited
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  • 90
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-83/26
    In: CRREL Report, 83-26
    Beschreibung / Inhaltsverzeichnis: Ice accreted on high-speed rotors operating in supercooled fog can be thrown off by centrifugal force, creating severe unbalance and dangerous projectiles. A simple force balance analysis indicates that the strength of accreted ice and its adhesive strength can be obtained by measuring the thickness of the accretion, the location of the separation, the rotor speed, and the density. Such an analysis was applied to field and laboratory observations of self-shedding events. The results agree reasonably well with other observations.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 13 Seiten , Illustrationen
    Serie: CRREL Report 83-26
    Sprache: Englisch
    Standort: AWI Archiv
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  • 91
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-84/6
    In: CRREL Report, 84-6
    Beschreibung / Inhaltsverzeichnis: An expression relating aerosol growth to cold environmental conditions was developed. This was accomplished by solving the diffusion equation with the method of Laplace transformation. The series solution was expressed in terms of the dimensionless parameters K (ratio of vapor density over droplet surface to droplet density), ω (ratio of environmental vapor density at time zero to vapor density over droplet surface), and dimensionless time τ (ratio of product of diffusion coefficient D and time t to square of initial radius of condensation nucleus). To take into account the variation of the vapor density over the surface of an acidic condensation nucleus due to the continuous dilution of the droplet, the solution was obtained by assuming various levels of constant vapor concentration. The final expression [R/R sub o - 1 = 2.4917 x 10 to the minus 18th power) exp(0.0737 θ) (P sub RHS/25) x (100-P sub RHS) τ to the 0.9890 powder] can be used to compute the value of R once the values of initial radius R sub o, relative humidity P sub RH, percent of relative humidity at the droplet surface P sub RHS, and environmental temperature θ are given.
    Materialart: Schriftenreihen ausleihbar
    Seiten: vi, 28 Seiten , Illustrationen
    Serie: CRREL Report 84-6
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Nomenclature General background The problem Method of solution Results and discussion Conclusions Literature cited Appendix: Evaluation of rn's in equation 25
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  • 92
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-84/5
    In: CRREL Report, 84-5
    Beschreibung / Inhaltsverzeichnis: Diatom species composition and relative abundances were determined for ice cores obtained from Weddell Sea pack ice during the October-November 1981 Weddell Polynya Expedition (WEPOLEX). Ice thickness and salinity indicate that the ice was less than one year old. The predominant ice type (70%) was frazil, which has the capacity to mechanically incorporate biological material through nucleation and scavenging. Diatoms were found throughout the length of the cores. Species showed down-core fluctuations in abundance that appeared to be correlated with changes in ice type. Pennate forms were more abundant than centrics, the average ratio being 16:1. Diatom frustules with intact organic material were more abundant (5 billion cells/liter). Differences in species abundances are attributed initially to incorporation of algal cells from a temporally changing water column and subsequently to diatom reproduction within the ice. Scanning electron micrographs illustrating the morphologic characteristics of the predominant species are included.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 46 Seiten , Illustrationen
    Serie: CRREL Report 84-5
    Sprache: Englisch
    Anmerkung: Contents Abstract Preface Introduction Materials and methods Results Discussion Conclusions Literature cited Appendix A: Taxonomic terms Appendix B: Differences in species composition and abundance in duplicate samples examined under optical and inverted light microscopes Appendix C: Morphologic descriptions and SEM micrographs
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  • 93
    Signatur: AWI A3-20-93434-2
    In: Meteorologische Abhandlungen / Institut für Meteorologie und Geophysik der Freien Universität Berlin, Band XXXII, Heft 2
    Materialart: Schriftenreihen ausleihbar
    Seiten: 218 Seiten , Illustrationen
    Serie: Meteorologische Abhandlungen / Institut für Meteorologie und Geophysik der Freien Universität Berlin 32,2
    Sprache: Deutsch
    Anmerkung: Zugleich: Dissertation, Freie Unversität Berlin, [ca. 1963] , INHALTSVERZEICHNIS PROBLEMSTELLUNG UND ZIELSETZUNG 1. BEMERKUNGEN ZUM BEOBACHTUNGSGELÄNDE UND ZUM BEOBACHTUNGSMATERIAL 1.1 Das Beobachtungsgelände 1.2 Das Beobachtungsmaterial 2. HOMOGENITÄTSBETRACHTUNGEN 2.1 Temperatur 2.2 Niederschlag 2.3 Wind 2.4 Sonnenschein und Bewölkung 3. TEMPERATURVERHÄLTNISSE 3.1 Monats- und Jahreswerte 3.2 Tageswerte 3.3 Pentadenwerte 3.4 Häufigkeitsbetrachtungen 3.5 Interdiurne Veränderlichkeit 3.6 Der tägliche Gang 3.7 Vorkommen bestimmter Schwellenwerte 3.71 Frost- und Eistage 3.72 Sommer- und Tropentage 4. DER WASSERGEHALT DER LUFT 4.1 Monats- und Jahreswerte 4.2 Tageswerte 4.3 Häufigkeitsbetrachtungen 4.4 Interdiurne Veränderlichkeit 4.5 Der tägliche Gang 5. BEWÖLKUNGSVERHÄLTNISSE 5.1 Monats- und Jahreswerte 5.2 Tageswerte 5.3 Häufigkeitsbetrachtungen 5.4 Der tägliche Gang 5.5 Heitere und trübe Tage 5.6 Nebel 6. SONNENSCHEIN 6.1 Monats- und Jahreswerte 6.2 Tageswerte 6.3 Der tägliche Gang 7. NIEDERSCHLAGSVERHÄLTNISSE 7.1 Monats- und Jahreswerte 7.2 Niederschlagsbereitschaft 7.3 Tageswerte 7.4 Der tägliche Gang 7.5 Häufigkeitsbetrachtungen 7.6 Niederschlags- und Trockenperioden 7.7 Niederschlag und Wind· 7.8 Schneeverhältnisse 7.81 Schneefall und Schneedecke 7.82 Schneehöhe 7.9 Gewitter 8. WINDVERHÄLTNISSE 8.1 Windrichtung 8.2 Windgeschwindigkeit 8.21 Der jährliche Gang 8.22 Häufigkeitsbetrachtungen 8.23 Sturmtage und Windstillen 8.24 Der tägliche Gang 9.ZUSAMMENFASSUNG VERZEICHNIS DER TEXTTABELLEN VERZEICHNIS DER ABBILDUNGEN LITERATURVERZEICHNIS TABELLENANHANG
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  • 94
    Schriftenreihen ausleihbar
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-80/8
    In: CRREL Report, 80-8
    Beschreibung / Inhaltsverzeichnis: This report presents the results of the tests on the new U.S. Coast Guard 140-ft icebreaker Katmai Bay (WTGB-101) in the level plate ice and brash ice in Whitefish Bay and the St. Marys River. The results indicate that the vessel can penetrate 22 in. of level freshwater ice with 2-3 in. of snow cover. It can also penetrate up to 48 in. of brash ice in a continuous mode and at least 30 in. of plate ice by backing and ramming. The installed bubbler system decreased the required power of the vessel from 10 to 30% in brash ice and 25 to 35% in level ice. The low friction coating appears to be effective in decreasing the friction factor when it remains intact; when it peels off it appears to make conditions worse than plain paint. An average dynamic friction factor of 0.15 could be used over the entire hull for these tests.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 28 Seiten , Illustrationen
    Serie: CRREL Report 80-8
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Metric conversion table Introduction Roughness and friction measurements Level plate ice performance Brash ice performance Ramming icebreaking performance Analysis of the data Propulsion efficiency in ice Regression analysis Conclusions and recommendations Literature cited
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  • 95
    Schriftenreihen ausleihbar
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-80/10
    In: CRREL Report, 80-10
    Beschreibung / Inhaltsverzeichnis: A mathematical model of coupled heat and moisture flow in soils has been developed. The model includes algorithms for phase change of soil moisture and frost heave and permits several types of boundary and initial conditions. The finite element method of weighted residual (Galerkin procedure) was chosen to simulate the spatial regime and the Crank-Nicholson method was used for the time domain portion of the model. To facilitate evaluation of the model, the heat and moisture fluxes were essentially decoupled; moisture flux was then simulated accurately, as were heat flux and frost heave in a laboratory test. Comparison of the simulated and experimental data illustrates the importance of unsaturated hydraulic conductivity. It is one parameter which is difficult to measure and for which only a few laboratory test results are available. Therefore, unsaturated hydraulic conductivities calculated in the computer model may be a significant source of error in calculations of frost heave. The algorithm incorporating effects of surcharge and overburden was inconclusively evaluated. Time-dependent frost penetration and frost heave in laboratory specimens were closely simulated with the model. After 10 days of simulation, the computed frost heave was about 2.3 cm vs 2.0 cm and 2.8 cm in two tests. Frost penetration was computed as 15 cm and was measured at 12.0 cm and 12.2 cm in the two laboratory samples after 10 days.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 49 Seiten , Illustrationen
    Serie: CRREL Report 80-10
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction One-dimensional equations of simultaneous heat and moisture flux Moisture transport Heat transport Phase change Coupling effects Frost heave algorithm Development of computer model Finite difference vs finite element method Finite element formulation Time domain solution Evaluation of the mathematical model Heat flux Moisture flux Numerical dispersion Frost heave of homogeneous laboratory samples Conclusions Recommended studies to refine the model Literature cited Appendix A. Work plan, staffing and instrumentation requirements for correlating results oflaboratory frost susceptibility tests with field performance Appendix B. Proposed investigation of thaw weakening of subgrade soil and granular unboundbase course Appendix C. Derivation of finite element system matrices
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  • 96
    Schriftenreihen ausleihbar
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/10
    In: CRREL Report, 81-10
    Beschreibung / Inhaltsverzeichnis: Abstract: This treatise thoroughly reviews the subjects of density, thermal expansion and compressibility of ice; snow density change attributed to destructive, constructive and melt metamorphism; and the physics of regelation and the effects on penetration rate of both the thermal properties of the wire and stress level. Heat capacity, latent heat of fusion and thermal conductivity of ice and snow over a wide range of temperatures were analyzed with regression techniques. In the case of snow, the effect of density was also evaluated. The contribution of vapor diffusion to heat transfer through snow under both natural and forced convective conditions was assessed. Expressions representing specific and latent heat of sea ice in terms of sea ice salinity and temperature were given. Theoretical models were given that can predict the thermal conductivities of fresh bubbly ice and sea ice in terms of salinity, temperature and fractional air content.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 27 Seiten , Illustrationen
    Serie: CRREL Report 81-10
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Nomenclature Introduction Density, thermal expansion and compressibility of ice Density Thermal expansion Compressibility Density changes in snow Compaction Destructive metamorphism Constructive metamorphism Melt metamorphism Regelation Thermal properties of snow and fresh-water ice Heat capacity of snow and ice Latent heat Thermal conductivity of ice Thermal conductivity of snow Effective thermal diffusivity Heat transfer by water vapor diffusion in snow Heat and vapor transfer with forced convection Thermal properties of sea ice Specific heat of sea ice Heat of fusion of sea ice when 0° 〉 θ 〉 -8.2°C Density and thermal conductivity of sea ice Composition and air bubble content of sea ice above -8.2°C Thermal conductivity model for sea ice Thermal diffusivity of sea ice Method of determining thermal diffusivity Summary Literature cited
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  • 97
    Signatur: ZSP-119-10
    In: Altenburger naturwissenschaftliche Forschungen, Heft 10
    Materialart: Schriftenreihen ausleihbar
    Seiten: 56 Seiten , Illustrationen
    Serie: Altenburger naturwissenschaftliche Forschungen 10
    Sprache: Deutsch
    Anmerkung: Inhalt 1. Einleitung 2. Gebirge und Berge 3. Kurzer Überblick zur Geologie Sachsens 4. Die ertrunkenen „Inselberge" des Tief- und Hügellandes und Entsprechungen im Erzgebirge 5. Tertiärer Vulkanismus und berühmte Berge Sachsens 6. Schichtkämme und -rücken auf der Rumpffläche des Varistischen Gebirges mit Konvergenzen zur tertiären „Inselberg"-Formation 6.1. Der Collmberg-Schichtkamm 6.2. Schichtkämme und -rücken aus kulmischer und präkamabrischer Grauwacke und Rothsteiner Kieselschiefer 7. Rochlitzer Berg - Rest eines vulkanischen Tuffkegels der Rotliegendzeit 8. Elbsandsteingebirge Zusammenfassung Literatur
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  • 98
    Signatur: AWI Bio-21-94361
    Materialart: Monographie ausleihbar
    Seiten: 601 Seiten , Illustrationen , 26 cm
    ISBN: 094873745x
    Sprache: Englisch
    Anmerkung: Contents Introduction Acknowledgements Classification of British diatoms New combinations References Description of plates Index to the genera and plates
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  • 99
    Signatur: AWI G4-22-95044
    Materialart: Monographie ausleihbar
    Seiten: 145 Seiten , Illustrationen , 23 cm
    ISBN: 3728125768 (kart.)
    Serie: Schlußbericht NFP 31
    Sprache: Deutsch
    Anmerkung: Inhaltsverzeichnis Zusammenfassung Résumé Summary 1 Einführung 1.1 Hydrologie des Gebirgswaldes im Winter 1.2 Arbeitshypothesen 1.3 Methodischer Ansatz 2 Standorte und Methoden 2.1 Standortwahl 2.2 Untersuchungsstandorte und deren Instrumentierung 2.2.1 Testfläche Davos 2.2.2 Testfläche Alptal 2.3 Verarbeitung der Bilder zur Schneeinterzeption 2.4 Modellierung des Wasser- und Wärmehaushaltes 2.4.1 Modellbeschrieb 2.4.2 Modellanwendung und Klimaszenarien 3 Ergebnisse der Feldmessungen 3.1 Winterverläufe in Davos und im Alptal 3.1.1 Davos 1993/94 3.1.2 Davos 1992/93 3.1.3 Alptal 1993/94 3.1.4 Standort vergleich des Interzeptionsverhaltens 3.1.5 Standortvergleich des Abflussverhaltens 3.2 Einzelereignisse im Alptal und in Davos 3.2.1 Testfläche Alptal 3.2.2 Testfläche Davos 3.3 Wassertransport in der Waldschneedecke 3.4 Zusammenfassung der Feldbeobachtungen 4 Ergebnisse der Modellsimulationen 4.1 Modellkalibrierung 4.1.1 Baumfläche Davos - Winter 1992/93 95 4.1.2 Baumfläche Alptal - Winter 1993/94 und Sommer 1994 4.2 Modelltest 4.2.1 Baurnfläche Davos - Winter 1993/94 4.2.2 Lichtungsfläche Davos - Winter 1993/94 4.3 Simulationen mit heutigen und veränderten Klimabedingungen 4.3.1 Vergleich des gemessenen und stochastisch simulierten Wetters 4.3.2 Auswirkungen einer Klimaänderung in Davos 4.3.3 Auswirkungen einer Klimaänderung im Alptal 4.4 Zusammenfassung der Modellergebnisse 5 Schlussbemerkungen Abbildungsverzeichnis Tabellenverzeichnis Literaturverzeichnis , Zusammenfassung in französischer und englischer Sprache
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  • 100
    Signatur: AWI G3-22-94842-1
    In: Advances in hillslope processes, Volume 1
    In: British Geomorphological Research Group symposia series
    Materialart: Monographie ausleihbar
    Seiten: XVIII, 683 Seiten , Illustrationen
    ISBN: 0-471-96774-2
    Serie: Advances in hillslope processes 1
    Sprache: Deutsch
    Anmerkung: Contents List of Contributors Foreword / R. J. Chorley Section 1 INTRODUCTION Chapter 1 Hillslope Processes: Research Prospects / M. G. Anderson and S. M. Brooks Section 2 HILLSLOPE HYDROLOGICAL PROCESSES Chapter 2 An Evolving Perceptual Model of Hillslope Flow at the Maimai Catchment / D. D. Brammer and J. J. McDonnell Chapter 3 Runoff and Erosion from a Rapidly Eroding Pinyon-Juniper Hill slope / B. P. Wilcox, J. Pitlick, C. D. Allen and D. W. Davenport Chapter 4 Time-Dependent Changes in Soil Properties and Surface Runoff Generation / T. P. Burt and M. C. Slattery Chapter 5 Hydrological Impact of a High-Magnitude Rainfall Event / R. Evans Chapter 6 Short-term Hydrological Response of Soil Water and Groundwater to Rainstorms in a Deciduous Forest Hillslope, Georgia, USA / E. B. Ratcliffe, N. E. Peters and M. Tranter Chapter 7 Modelling the Influence of Afforestation on Hillslope Storm Runoff / T. J. A. Davie Section 3 HILLSLOPE SOLUTE PROCESSES Chapter 8 Movement of Water and Solutes from Agricultural Land: The Effects of Artificial Drainage / A. C. Armstrong and G. L. Harris Chapter 9 Nitrogen and Phosphorous Flows from Agricultural Hillslopes / K. W. T. Goulding, L. S. Matchett, G. Heckrath, C. P. Webster, P. C. Brookes and T. P. Burt Chapter 10 Phosphorus Fractionation in Hillslope Hydrological Pathways Contributing to Agricultural Runoff / R. M. Dils and A. L. Heathwaite Chapter 11 Nutrient Cycling in Upland Catchment Areas: The Significance of Organic Forms of N and P / A. C. Edwards, M. D. Ron Vaz, S. Porter and L. Ebbs Chapter 12 Identification of Critical Source Areas for Phosphorus Export from Agricultural Catchments / W. J. Gburek, A. N. Sharpley and H. B. Pionke Chapter 13 Pathways and Forms of Phosphorus Losses from Grazed Grassland Hillslopes / P. M. Haygarth and S. C. Jarvis Chapter 14 Modelling the Solute Uptake Component of Hillslope Hydrochemistry: Are Flow Times and Path Lengths Important during Mineral Dissolution? / S. Trudgill, J. Ball and B. Rawlins Section 4 SOIL PROCESSES ON HILLSLOPES Chapter 15 The Influence of Slope on the Nature and Distribution of Soils and Plant Communities in the Central Brazilian cerrado / P.A. Furfey Chapter 16 Nitrous Oxide Emissions from a Range of Soil-Plant and Drainage Conditions in Belize / R. M. Rees, K. Castle, J. R. M. Arah and P. A. Furfey Chapter 17 A Soil-Landscape Continuum on a Three-Dimensional Hillslope, Quantock Hills, Somerset / S. J. Park, T. P. Burt and P. A. Bull Chapter 18 Modern Fluvial Processes on a Macroporous Drift-Covered Cavernous Limestone Hillslope, Castleton, Derbyshire, UK / P. Hardwick and J. Gunn Chapter 19 Examining the Factors Controlling the Spatial Scale of Variation in Soil Redistribution Processes from Southwest Niger / A. Chappell, M.A. Oliver, A. Warren, C. T. Agnew and M. Charlton Chapter 20 Variations in Tree Communities and Soils with Slope in Gallery Forest, Federal District, Brazil / M. C. da Silva Junior, P. A. Furfey and J. A. Ratter Chapter 21 The Significance of Soil Profile Differentiation to Hydrological Response and Slope Instability: A Modelling Approach / S. M. Brooks and A. J. C. Collison Section 5 SOIL EROSION ON HILLSLOPES Chapter 22 Soil Erosion by Water: Problems and Prospects for Research / J. Boardman Chapter 23 The Particle-Size Selectivity of Sediment Mobilization from Devon Hillslopes / P. M. Stone and D. E. Walling Chapter 24 Shifts in Rates and Spatial Distributions of Soil Erosion and Deposition under Climate Change / D. T. Favis-Mort/ock and M. R. Savabi Chapter 25 Simulation of Radiocaesium Redistribution on Cultivated Hillslopes using a Mass-Balance Model: An Aid to Process Interpretation and Erosion Rate Estimation / T. A. Quine, D. E. Walling and G. Govers Chapter 26 Erosional Response to Variations in Interstorm Weathering Conditions / R. Bryan Chapter 27 Field Studies of Runoff Processes on Restored Land in South Wales and the Design of Channels for Erosion Control / R. A. Hodgkinson and A. C. Armstrong Chapter 28 On the Complexity of Sediment Delivery in Fluvial Systems: Results from a Small Agricultural Catchment, North Oxfordshire, UK / M. C. Slattery and T. P. Burt Chapter 29 Verification of the European Soil Erosion Model (EUROSEM) for Varying Slope and Vegetation Conditions / R. P. C. Morgan Chapter 30 Validation Problems of Hydrologic and Soil-Erosion Catchment Models: Examples from a Dutch Erosion Project / A. P. J. De Roo
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