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  • English  (3,729)
  • Danish  (18)
  • Spanish  (18)
  • Japanese  (8)
  • Greek, Modern (1453- )  (2)
  • 1990-1994  (3,102)
  • 1955-1959  (674)
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  • 1
    Monograph available for loan
    Monograph available for loan
    London : H.M.S.O
    Call number: AWI G10-18-91809
    Type of Medium: Monograph available for loan
    Pages: 45 Seiten , Karte , 30 cm
    Edition: 2nd ed
    ISBN: 0115917179 (pbk.)
    Language: English
    Location: AWI Reading room
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  • 2
    Call number: ZSP-SCAR-570-16
    In: National Antarctic Research Report to SCAR, No. 16
    Type of Medium: Series available for loan
    Pages: 99 Seiten , Illustrationen
    ISSN: 0179-0072
    Series Statement: National Antarctic Research Report to SCAR 16
    Language: English
    Note: CONTENTS: I. National Committee for Antarctic Research, and National Operating Body. - II. Map of Stations. - Ill. Permanent Observatories, Regular Observations and Long-term Monitoring. - IV. Report on Highlights of Science Activities from Previous Reporting Period (1 Oct. 93 - 31 March 94). - A. Biology. - B. Geodesy & Geographic Information. - C. Geology. - D. Solid Earth Geophysics. - E. Glaciology. - F. Human Biology & Medicine. - G. Atmospheric Sciences. - H. Logistics. - I. Ocean Physical Sciences (incl. Marine Chemistry). - V. List of Permits and Rationale for Entry into SPAs and SSSIs. - VI. Prospectus of Planned Activities for Coming Reporting Period (1 April 94 - 31 March 95). - A. Biology. - B. Geodesy & Geographic Information. - C. Geology. - D. Solid Earth Geophysics. - E. Glaciology. - F. Human Biology & Medicine. - G. Atmospheric Sciences. - H. Logistics. - I. Ocean Physical Sciences (incl. Marine Chemistry). - VII. Future Activities Planned & Funded (beyond 31 March 95). - A. Biology. - B. Geodesy & Geographic Information. - C. Geology. - D. Solid Earth Geophysics. - E. Glaciology. - F. Human Biology & Medicine. - G. Atmospheric Sciences. - H. Logistics. - I. Ocean Physical Sciences (incl. Marine Chemistry). - VIII. Bibliography. - IX. List of Principal Investigators and Responsible Authorities.
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  • 3
    Monograph available for loan
    Monograph available for loan
    [Erscheinungsort nicht ermittelbar] : [Verlag nicht ermittelbar]
    Call number: AWI P4-19-92238
    Type of Medium: Monograph available for loan
    Pages: 16 Seiten , Illustrationen
    Language: English
    Location: AWI Reading room
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  • 4
    Call number: ZSP-201-93/11
    In: CRREL Report, 93-11
    Description / Table of Contents: A laboratory study of the behavior of snow under shock wave loading and unloading conditions was conducted using a 200-mm-diameter gas gun to generate loading waves in snow samples with initial densities of 100 to 520 kg m-3 at temperatures of -2 to -23 deg C. Stress levels were 2 to 40 MPa. The response of snow to shock wave loading was measured as a function of distance from the impact plane using embedded stress gauges. Large impedance differences between snow and the stress gauges produced complex stress histories. A finite element model, along with a simple analytical model of the experiment, was used to interpret the stress histories. Snow deformation was not affected by initial temperature, but was found to be rate dependent. The initial density of the snow determined its pressure-deformation path. The pressure needed to compact snow to a specific final density increases with decreasing initial density. The release moduli increased nonlinearly from 50 MPa at a snow pressure of about 15 MPa to 2700 MPa at a snow pressure of about 40 MPa.
    Type of Medium: Series available for loan
    Pages: iii, 150 Seiten , Illustrationen
    Series Statement: CRREL Report 93-11
    Language: English
    Note: CONTENTS Preface Introduction Experimental equipment and methods Gas gun Snow target assembly Data acquisition Experimental procedure Measured data Stress histories Snow characterization Data analysis Recommendations Experimental methods Experimental needs Summary Literature cited Appendix A : Stress-time data plots Appendix B: Tabulated stress-time data Abstract
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  • 5
    Call number: ZSP-SCAR-570-14
    In: National Antarctic Research Report to SCAR, No. 14
    Type of Medium: Series available for loan
    Pages: 133 Seiten , Illustrationen
    ISSN: 0179-0072
    Series Statement: National Antarctic Research Report to SCAR 14
    Language: English
    Note: CONTENTS: I. National Committee for Antarctic Research, and National Operating Body. - II. Map of Stations. - Ill. Permanent Observatories, Regular Observations and Long-term Monitoring. - IV. Report on Highlights of Science Activities from Previous Reporting Period (1 Oct. 91 - 31 March 92). - A. Biology. - B. Geodesy & Geographic Information. - C. Geology. - D. Solid Earth Geophysics. - E. Glaciology. - F. Human Biology & Medicine. - G. Atmospheric Sciences. - H. Logistics. - I. Ocean Physical Sciences (incl. Marine Chemistry). - V. List of Permits and Rationale for Entry into SPAs and SSSIs. - VI. Prospectus of Planned Activities for Coming Reporting Period (1 April 92 - 31 March 93). - A. Biology. - B. Geodesy & Geographic Information. - C. Geology. - D. Solid Earth Geophysics. - E. Glaciology. - F. Human Biology & Medicine. - G. Atmospheric Sciences. - H. Logistics. - I. Ocean Physical Sciences (incl. Marine Chemistry). - VII. Future Activities Planned & Funded (beyond 31 March 93). - A. Biology. - B. Geodesy & Geographic Information. - C. Geology. - D. Solid Earth Geophysics. - E. Glaciology. - F. Human Biology & Medicine. - G. Atmospheric Sciences. - H. Logistics. - I. Ocean Physical Sciences (incl. Marine Chemistry). - VIII. Bibliography. - IX. List of Principal Investigators and Responsible Authorities.
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  • 6
    Monograph available for loan
    Monograph available for loan
    Bonn : Federal Ministery for Research and Technology
    Call number: AWI A1-19-92588
    Type of Medium: Monograph available for loan
    Pages: 51 Seiten , Illustrationen
    ISBN: 3881352376
    Language: English
    Note: Contents Preface Introduction The Earth as a global system Basic building blocks Introduction The atmosphere The hydrosphere The cryosphere The geosphere The biosphere Global cycles Introduction The water cycle Bio-geochemical cycles Natural changes Introduction Crucial changes on characteristic time scales The development of civilization and its consequences for the Earth system Signals from a disturbed environment Introduction The changed environment Problems caused by a growing world population The world of tomorrow Introduction Climate models and their limits Living in a greenhouse searching for traces and solutions The sciences being challenged Introduction Guidelines for a program of research into global changes Science and politics take up the challenge: International and national research programs Introduction International efforts Global Change research in Germany Acronyms and Abbreviations Bibliography: Illustrations
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  • 7
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-91/5
    In: CRREL Report, 91-5
    Description / Table of Contents: An analysis of the National Science Foundation's surface vehicle fleet in Antarctica is reported on here. Surface vehicle needs have been determined through interviews of vehicle users, managers and maintainers, and from direct on-site observation. An ideal grouping of vehicle categories is proposed that will address current needs and provide flexibility for the future. Ultimately, recommendations for streamlining and modernizing the NSF Antarctic vehicle fleet are made. Cargo transportation over snow was identified as being in a crisis state. Personnel movement functions for all but traversing are performed adequately at this time, although there is much room for improvement. Brands and models must be selected for some categories of recommended vehicle types. This will naturally follow a more in-depth analysis of candidates and discussions with NSF vehicle managers. A purchasing plan, including a time table, budget, and desired sequence of replacement, must then be formulated and executed.
    Type of Medium: Series available for loan
    Pages: v, 71 Seiten , Illustrationen
    Series Statement: CRREL Report 91-5
    Language: English
    Note: CONTENTS Preface Executive summary Introduction Regional divisions Zone A - rock and ice roads Zone B - local ice Zone C - traverse Zone D - ice edge Zone E - remote field site Zone F - inland station Current transportation needs in Antarctica Future transportation needs Transportation analysis Personnel transport Cargo transport Summary of analysis Recommendations for changes to U.S. vehicle fleet Conclusions and summary of findings Literature cited Appendix A: Age distribution of NSF surface vehicles Abstract
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  • 8
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-91/15
    In: CRREL Report, 91-15
    Description / Table of Contents: An overview is presented of recent activities and results in the use of commercially available short-pulse UHF radar for surveying ice conditions on freshwater bodies. Improvements in radar systems have made it possible to increase ice thickness resolution by as much as one third relative to that in past attempts, and some new signal processing approaches shown here may offer an order of magnitude improvement. Results from airborne surveying are shown in which the varieties of ice character are reflected. Given the lack of ground coupling, one can rely upon a reasonably well-defined wavelet structure for enhanced signal processing and interpretation possibilities. An algorithm is presented that locates returns from interfaces in the presence of noise for a non-minimum delay wavelet. The method performs a simple inversion in the frequency domain, enhanced by a time dependent weight designed to recognize the shape of the wavelet amplitude and phase spectra. Thin ice layers are resolved down to a few centimeters and are distinguished from an ice free condition by means of a matched filter system designed to recognize the interference pattern from parallel interfaces close to one another. The effects and constraints imposed by water layers on wet ice are discussed, as are general attenuation, sloping bottom, and critical angle effects in deeper water. In closing, observations on the problems and prospects of this sort of surveying are offered.
    Type of Medium: Series available for loan
    Pages: v, 31 Seiten , Illustrationen
    Series Statement: CRREL Report 91-15
    Language: English
    Note: Contents Preface Nomenclature Introduction Field surveys Methods and paraphernalia Results Sloping bottom effects and critical angle phenomena Deconvolution and thin layers Well-separated echoes Thin ice layers Thin layers of water Observations Literature cited Abstract
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  • 9
    Monograph available for loan
    Monograph available for loan
    [Rockville] : National Oceanic and Atmospheric Administration [u.a]
    Call number: MOP 47484 / Mitte
    Type of Medium: Monograph available for loan
    Pages: Loseblatt-Ausgabe , Illustrationen
    Language: English
    Location: MOP - must be ordered
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  • 10
    Call number: PIK M 490-19-93048
    Type of Medium: Monograph available for loan
    Pages: XIII, 577 S , Illustrationen, Diagramme
    Series Statement: Physica 191,1-4
    Language: English
    Location: A 18 - must be ordered
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  • 11
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-46
    In: Research report / Cold Regions Research and Engineering Laboratory, 46
    Description / Table of Contents: Summary: The results of studies in the summer of 1957 on ice samples taken from the ice tunnel at TUTO, core samples obtained by drilling in the ice cap at Site 2, and snow samples, using the transverse vibration method and a new portable meter, are reported. Young's modulus was determined from the resonance frequency of flexural vibrations of samples cut in the form of rectangular bars; the loss factor was measured from damping; and the coefficient of viscosity calculated using the Maxwell model. The modulus of elasticity of samples of a density from 0.917 - 0.90 g/cm^3 (tunnel ice) decreased sharply with slight deviations of the density from that of pure ice. At densities from 0.90 - 0.50 g/cm^3 (deep-pit and drill-core samples) the relation between the modulus of elasticity and density was linear, while in the density range from 0.50-0.25 g/cm^3 (surface snow) the modulus of elasticity decreased exponentially. The viscosity-density relation of the samples was similar to that of elasticity vs density. Young's modulus increased slightly with decreasing temperature, while viscosity increased exponentially. The activation energy was calculated as 18.7 kcal/mol for old ice-cap ice, 13.9 kcal/mol for tunnel ice with elongated bubbles, and 13.5 kcal/mol for super-imposed ice.
    Type of Medium: Series available for loan
    Pages: v, 29, A4 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 46
    Language: English
    Note: CONTENTS Preface Summary Introduction Principle of measuring the visco-elastic nature of snow and ice by the vibration method Experimental method for determination of visco-elastic properties of snow and ice Visco-elastic properties of tunnel ice Elastic properties of snow samples from the deep pit Elastic properties of core samples obtained by drilling Elastic properties of snow near the ice-cap surface Vertical variation of Young's modulus near the surface Wind-packed snow Peter snow Relation between Young's modulus and density of snow Relation between Young's modulus and density over the range from surface snow to ice Supplementary experiments on the elastic nature of snow and ice at Site 2 Anisotropy of Peter snow Age hardening Temperature dependence of Young's modulus of core ice Viscosity measurement of snow and ice in Greenland Further experiments on the elastic nature of tunnel ice Temperature dependence of Young's modulus Frequency dependence of Young's modulus Further experiments on the viscous nature of tunnel ice Temperature dependence of loss factor Activation energy Frequency dependence of loss factor and viscosity Relation between viscosity and density Conclusions References Appendix: Experimental data
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  • 12
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-50
    In: Research report / Cold Regions Research and Engineering Laboratory, 50
    Description / Table of Contents: Summary: Samples of cryoconite from the Nuna ramp area in Northwest Greenland have been analyzed for the mineral and cryptogamic content. The non-mineral content of the blue-black gelatinous, drip-free cryoconite was found to be about 95% of the wet mass. After drying and ashing, the organic matter comprised 13.9 to 20% of the oven-dry sample. The mineral matter was predominately fine-grained, sharp-edged grains from 1 mm or larger to microscopic in size and appeared to have been wind-borne from the adjacent nunataks and moraines. The organic matter was found to be largely algae with inclusion of fungi and a rotifer. Since algae utilize radiation primarily in the blue region between 0.40 μ and 0.65 μ, where ice has the greatest transmissivity, it is possible that the cryoconite holes are at least partly the product of energy released by photosynthetic and metabolic processes rather than by direct absorption of red or heat-wave lengths of solar radiation by the dark cryoconite. The uniformity in the pattern and dimensions of the cryoconite holes supports the assumption that biological processes are dominant in their formation and growth.
    Type of Medium: Series available for loan
    Pages: iv, 12, A2 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 50
    Language: English
    Note: CONTENTS Preface Summary Introduction Observations on the Nuna ramp Sample collection Distribution of the cryoconite holes Observations in the Thule ramp Physical analyses of the cryoconite Biological assay of the cryoconite References Appendix: A study of the bacteria and fungus content of the cryoconite of the Thule area
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  • 13
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-51
    In: Research report / Cold Regions Research and Engineering Laboratory, 51
    Description / Table of Contents: Summary: The study was made in order to simulate the deformation of a tunnel in glacier ice and compare the results with the theoretical value derived from compression or tension tests. The plastic deformation of commercial polycrystalline ice and manufactured snow-ice was determined by measuring the discharge of oil from the cavity of closed hollow ice cylinders subjected to high external pressure in an oil-filled pressure chamber. The deformation vs time curves were similar to those obtained in compression or tension tests. The relationships between minimum strain rate and applied pressure, or between minimum strain rate and the circumferential stress at the surface of the inner cavity, were found to differ from the power law ϵ ̇= ασⁿ, the value of n being an increasing function of stress. Analysis of time deformation curves indicates that viscoelastic models proposed by former investigators do not apply to the mechanism of the plastic deformation of ice.
    Type of Medium: Series available for loan
    Pages: iv, 10 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 51
    Language: English
    Note: CONTENTS Preface Summary Introduction Apparatus Specimens Experimental procedures and results Analysis of the data Discussion References
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  • 14
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-52
    In: Research report / Cold Regions Research and Engineering Laboratory, 52
    Description / Table of Contents: Summary: The results of studies on the physical properties of fog whiteout, as it occurred at Site 2 on the Greenland Ice Cap in the summers of 1956 and 1957, are reported and compared with the results of other studies; the instruments, methods of measurement, and data-reduction techniques used are described; and attempts at dissipating whiteout by AgI (silver iodide) seeding are discussed briefly. Emphasis was given to measurements of fog-particle size distribution, liquid-water content, relative humidity, visibility, and atmospheric nuclei. The data are tabulated. The synoptic situations for 2 selected cases of fog whiteout at relative humidities of less than 100% (possibly because of the presence of salt solutions) are described; and the balance between the rate at which water is made available in the air as it is lifted over the Ice Cap and the rate of water flux to the snow surface is computed using various equations. Efforts at fog dispersal by AgI seeding from the ground were inconclusive.
    Type of Medium: Series available for loan
    Pages: iv, 18, A1 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 52
    Language: English
    Note: CONTENTS Preface Summary Introduction Definition of whiteout Scope of this study Instrumentation and observations Location of project: Fog particle measurements Atmospheric humidity measurements Visibility measurements Air temperature measurements Radiation measurements Atmospheric nuclei Observations of fog whiteout Conditions prior to onset of whiteout Conditions at time of arrival and during whiteout Micro-structure of fog whiteout Analysis of moisture balance during two selected cases Synoptic situation for case 1 Synoptic situation for case 2 Computations Attempts at fog whiteout dispersal References Appendix A - Freezing nuclei observations Appendix B - Absolute humidity gradient data
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  • 15
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-56
    In: Research report / Cold Regions Research and Engineering Laboratory, 56
    Description / Table of Contents: Summary: The results of laboratory creep tests in a shear apparatus at -5°C on 2 x2 x 3/8 in. samples of commercial ice, artificial single crystals, and 6 types of ice from the Greenland Ice Cap, at shear stresses of about 0.5-3 kg/cm^2 are reported. Some uniaxial tests were made at stresses from 6-28 kg/cm^2 to supplement the shear tests. Creep data could usually be represented approximately by one or more linear sections on a log-deformation vs log-time plot. The linear sections of the double logarithmic curve imply a creep curve of the form ε=ct^m where ε is the strain. For all samples tested, except single crystals sheared in easy glide, m averaged 0. 5 for shear deformations up to about 1%, and approached unity for more deformation. For single ice crystals oriented for easy glide, m averaged 1.7, implying a strain softening. Single crystals oriented for hard glide behaved similarly to polycrystals, indicating a rate-controlling process such as dislocation climb. For all but single easy-glide crystals, the minimum creep rate was tangent to the deformation curve at the end of the experiment. Creep rates for single easy-glide crystals were several hundred times larger than for the other crystals, the flow laws being similar.
    Type of Medium: Series available for loan
    Pages: iv, 7 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 56
    Language: English
    Note: CONTENTS Preface Summary Introduction Types of ice Experiments Results Creep curves Flow law References
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  • 16
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-55
    In: Research report / Cold Regions Research and Engineering Laboratory, 55
    Description / Table of Contents: Summary: Experiments were performed to investigate the processes involved in the formation of sorted patterns which occur naturally in unconsolidated sandy gravel deposits covering the edge of the ice cap southeast of Thule, northwest Greenland. Four different glacier ice surfaces were covered with various thicknesses of sandy gravel in order to observe the effect of differential melting on the formation of sorted patterns. The different stages of pattern formation were recorded by photographs taken at 7-day intervals. A thin gravel cover of 2 in. allowed more rapid melting than did a cover of 6 in., with the result that depressions and mounds were formed. Coarse particles were segregated in the depressions by natural sorting of the various particle sizes when set in motion by differential melting and resulting uneven collapse of the gravel cover. The sorting produced well-developed stone rings in three of the areas, caused directly by the differential insulation provided by the gravel cover. In the fourth area a uniform gravel cover over a smooth ice surface produced no sorted nets, although a poorly developed stone stripe was formed in a melt-stream channel. A stone stripe was also formed in a stream channel cut into the ice along the edge of the test area. This stripe was composed of coarse particles which rolled down from the better insulated heights of the test area. It is therefore possible that sorted nets and stripes occurring naturally in the moraine deposits on the edge of the ice cap could have been formed by mechanical sorting induced by differential melting of the ice under a non-uniform layer of sandy gravel.
    Type of Medium: Series available for loan
    Pages: iv, 15 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 55
    Language: English
    Note: CONTENTS Preface Summary Introduction Procedure Preparation of test plots Measurements of ice and gravel surfaces Composition of the gravel covering Results Sorting in a smooth layer of sandy gravel over an uneven ice surface Sorting in a uniform layer of sandy gravel over depressions in the ice surface Sorting in a uniform layer of sandy gravel over a uniform ice surface Sorting in a non-uniform layer of sandy gravel over a uniform ice surface Discussion and recommendations Conclusions References
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  • 17
    Monograph available for loan
    Monograph available for loan
    Praha : Český Hydrometeorologický Ústav
    Call number: MOP 42912 / Mitte
    Type of Medium: Monograph available for loan
    Pages: Getr. Zählung
    ISBN: 80-900206-4-X
    Language: English
    Location: MOP - must be ordered
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  • 18
    Series available for loan
    Series available for loan
    Pasay City, Philippines : Typhoon Committee Secretariat
    Associated volumes
    Call number: MOP 46950(1991) / Mitte
    In: ESCAP/WMO Typhoon Committee annual review, 1991
    Type of Medium: Series available for loan
    Series Statement: ESCAP/WMO Typhoon Committee annual review 1991
    Language: English
    Location: MOP - must be ordered
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  • 19
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-19
    In: Research report / Cold Regions Research and Engineering Laboratory, 19
    Description / Table of Contents: Abstract: Measurements were made of global and net radiation between 6 July and 7 August 1955 at a site on the Greenland Ice Cap located near 78°N latitude and at an elevation of 6800 ft. Snow-surface temperatures during this period were below 0°C and mean cloudiness was 0.7. Total incident global radiation measured during the 33-day period amounted to 20,628 ?? of which only 3059 ??, or about 15%, were absorbed by the snow cover. Most of the absorbed global radiation was re-emitted as long-wave radiation, so the net gain during the observation period amounted to not more than 7.6 ??/day. Diffuse sky radiation amounted to only 19% of all incoming global radiation measured at the ice-cap research site. In the temperate zone, diffuse sky radiation amounts to 30% or more of the incoming radiation. The small amount of diffuse sky radiation indicates low atmospheric turbidity in this polar climatic zone. Incident global radiation was reduced by 6% in the presence of a 0.5 cloud cover. Under full overcast conditions the snow surface received 65% of the global radiation measured on clear days. In the temperate zone as little as 30% of global radiation reaches the earth under full cloud cover. The large amount of global radiation received in the Arctic under full cloud cover is the primary cause of one form of arctic white-out. Accompanying the small decrease in global radiation caused by cloudiness is a large decrease in effective outgoing long-wave radiation, with an increase in the net radiation balance. This condition contributes to a greater potential ablation of the snow and ice cover during cloudy seasons. The long-wave radiation balance at this site on the ice cap was always negative during the period covered by this study. Errors associated with the measurement of solar radiation at the low sun angles which prevailed at the research site were found to be about -3%. No correction was applied to the basic data, however, since there were insufficient data to establish the consistency of this error over the period of observation. During periods of blowing and drifting snow, 6% more global radiation was measured at 1.25 m above the snow surface than at 5.7 m elevation. The increase may be due to multiple reflection within the layer of blowing snow. The atmospheric transmission coefficient at the ice-cap site was found to be 0.968. This high value was associated with the low atmospheric turbidity. The heat balance of the snow cover as computed from the radiation measurements and a temperature profile in the snow was found to be 7.6 ??/day at the ice-cap site. This is a negligible heat gain when compared with the 400 ??/day gain by a spring snow pack in the Sierra Nevada of California. For the entire season when the sun is above the horizon, the estimated net gain by the ice cap is 1000 ??, no more than a 2-1/2-day heat supply used in melting the snow of the High Sierra. Some measurements made with a silicon solar battery similar to those developed by the Bell Telephone Laboratories indicate that it may have a significantly higher efficiency on the ice cap than in the more temperate zone. Verification of this apparent increase in efficiency and the causes for it require further study of the performance of the p-n junction cells in the Arctic.
    Type of Medium: Series available for loan
    Pages: iv, 20, [2] Seiten , Illustrationen , 27 cm
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 19
    Language: English
    Note: CONTENTS I. Introduction II. Instrumentation Recording of data III. Results Global radiation Albedo of snow Diffuse sky radiation Effect of clouds on radiation Atmospheric and terrestrial radiation Effect of low sun angle on measured radiation Global radiation gradient Atmospheric transmission coefficient Heat balance of snow cover Applied use of solar energy References. Appendix
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  • 20
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-30
    In: Research report / Cold Regions Research and Engineering Laboratory, 30
    Description / Table of Contents: Summary: Deformations occurring in a tunnel, two trenches, and a 30 m deep pit excavated in the Greenland névé in the summer of 1954 have been measured over a period of 2 years. The experimental results indicate that closure rates increase with lateral distance from a restraining boundary up to distances of about 1 m. At larger distances, the effect of the boundary is not appreciable. Closure rates for deep excavations are not found to be strongly depth-dependent. This is due to a roughly parallel increase of viscosity and pressure with depth. Vertical compaction results from the pit agree well with those calculated from the depth-density relation using Sorge's Law. A theoretical calculation for the tunnel and pit closure, which is a modification of existing theories for the deformation of an elastic, compressible, thick-walled cylinder, is in fair agreement with the observed deformations. From this agreement it appears that the flow behavior of the névé can be described on the basis of a Newtonian viscosity. The trench closure is described as the-squeezing out of horizontal layers, fixed at some distance from the trench, and modified only slightly by the drag of neighboring layers. Measurements will be continued during future summers.
    Type of Medium: Series available for loan
    Pages: iv, 14 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 30
    Language: English
    Note: CONTENTS Preface Summary Introduction Measurements and results Tunnel North-south trench East-west trench Deep pit Theoretical development Sorge's Law Deformation of acylindrical tunnel in a viscous compressible medium Discussion Tunnel Trenches Deep pit References Appendix
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  • 21
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-31
    In: Research report / Cold Regions Research and Engineering Laboratory, 31
    Description / Table of Contents: Summary: Studies were conducted on 58 snow-ice beams (7.5 cm wide, 10.0 cm high, and 56.0 cm long) ranging in density from 0.621 - 0.719 g/cm^3 under varying loads, at uniform loading rates (except for 23 beams which were tested with repeated loading), and at a constant temperature of -5 ± 0.5°C. All beams were tested to failure. The modulus of elasticity of the beams increased with density and loading rate. The modulus of elasticity ranged from 1.35 x 10^4 to 2.22x 10^4 kg/cm^2 for densities of 0.621 - 719 g/cm^3 respectively. A variation in the relative time of deflection from 42 - 23 sec/0.0200 cm gave a variation in the modulus of elasticity from 1.22 x 10^4 to 1.42 x 10^4 kg/cm^2. The modulus of rupture was roughly a linear function of density, increasing from 7.79 - 11.54 kg/cm^2 with density. Failure of the beams was sudden, with a conchoidal fracture occurring in the middle third of the span, and appeared to be a combination of shear and flexure.
    Type of Medium: Series available for loan
    Pages: iv, 9, A4, B10 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 31
    Language: English
    Note: CONTENTS Preface Summary Introduction Method Procedure Test results Tests conducted Data and calculations Discussion of results References Appendix A. Drawings of apparatus Appendix B. Load-deflection and time-deflection curves for snow beams of various densities
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  • 22
    Call number: AWI G4-22-94968
    Type of Medium: Monograph available for loan
    Pages: x, 532 Seiten , Illustrationen , 23 cm
    ISBN: 0-662-18742-3
    Series Statement: NHRI symposium No. 6
    Language: English
    Note: TABLE OF CONTENTS FOREWORD PREFACE INTRODUCTION SECTION 1: GENERAL PAPERS Case Study of a Grounded Jam; Restigouche River, New Brunswick / by S. Beltaos and B.C. Burrell Water Balance and Geochemistry Studies in a Tundra Watershed, District of Keewatin, Northwest Territories / by G.G. Bursey, T.W.D. Edwards and S.K. Frape River Icing Mounds: a Winter Water Source on the Eastern North Slope of Alaska / by E.F. Chacho, C.M. Collins, A.J. Delaney and S.A. Arcone Geochemical Evolution of Water in a Continental High Boreal Wetland Basin: Preliminary Results / by D. Craig A Physical Model of Ice Overthn.ist during the Break-Up of Intact River-Ice Covers / by M.N. Demuth and T.D. Prowse Seasonal Changes in the Hydrochemistry of Land Drainage: Colour Lake Catchment, Axel Heiberg Island, N.W.T. / by M. English, S. Schiff, M. Ecclestone, W.P. Adams, M. Hinton, L. Pezzutto, R. Elgood, C. Allan and D. Pierson Shape, Length and Flow· Conditions of Conduits at South Cascade Glacier, Washington State, U.S.A. / by A.G. Fountain CO2-Rich Ground Waters of the Flat River Valley, N.W.T. / by S.M. Hamilton, F.A. Michel and C.W. Jefferson Regional Snow Ablation in the Alaskan Arctic / by L.D. Hinzman, D.L. Kane and R.E. Giec Regionalization of Low Flows in Yukon Territory / by J.R. Janowicz Discharge Regimes of a Glacierized Basin, Slims River, Yukon / by P.G. Johnson Pulses in Glacier Discharge: Indicators of the Internal Drainage System of Glaciers / by P.G. Johnson Drainage of an Ice-Dammed Lake, Kaskawulsh Glacier Basin, Yukon / by J.N. Kasper and P.G. Johnson On Areal Distribution. of Snowcover in a Mountainous Area / by A. Killingtveit and K. Sand Hydrogeochemical Aspects of Two Selected Sites in a Fringe Zone of Discontinuous Permafrost / by Y.T.J. Kwong, D. Craig and M. Griffin Ice-Cover Growth and Freeze-Out of Solutes in a Mackenzie Delta Lake / by L.F.W. Lesack, P. Marsh and R.E. Hecky Hydrological Processes in a Small Catchment Containing a Perennial Snowbank, Melville Island, N.W.T. / by A.G. Lewkowicz and K.L. Young On Modelling Surface Meltwater Discharge from Arctic and Alpine Glaciers / by D.S. Munro A High Arctic Occurrence of Seasonal Frost Mounds / by W.H. Pollard Relationships between Snow Chemistry and Blowing Snow: Initial Findings / by J.W. Pomeroy, T.D. Davies and M. Tranter Peatlands of the Lake Melville Coastal Plain, Labrador / by J.S. Price, D.A. Maloney and F.G. Downey Constraints on the Origin of Acidity in Colour Lake, Axel Heiberg Island (79°25'N) / by S. Schiff, M. English, M. Ecclestone, R. Elgood, M. Hinton and L. Pezzutto Longitudinal Dispersion in the Ice-Covered Athabasca River / by G. Van Der Vinne and D. Andres Economic Impact of River Ice Jams in Canada / by G. Van Der Vinne, T.D. Prowse and D. Andres Estimation of Mass-Balance and Run-Off Component of Urumqi Glacier No. I from Water-Balance Analysis / by Z. Yang SECTION 2: MODELLING Interactive Modelling of Cold Regions Watersheds with SSARR / by E.A. Cassell and T. Pangburn Estimates of Evaporation in the Yukon and Northwest Territories / by J. Haas A Basin Water-Storage Model to Forecast Columbia River Discharge / by W. Tangborn Preliminary Findings from Experiments on Frazil and Anchor Ice in a Circular Flume / by G. Tsang and B. Trapp On Computer Simulation of Ice Motion in Rivers / by O.G. Vinogradov, A. Springer and P. Wierzba SECTION 3: OTHER CONTRIBUTIONS Transformation of Heavy Metals under Tidal Flows in the Severnaya Dvina Estuary / by V.F. Brekhovskikh, A.N. Malutin and M.A. Mordasov Northern River: BOD-DO Model / by V.F. Brekhovskikh and G.V. Volpian Water Storage in Alpine Glaciers (Abstract) / by M.M. Brugman Snowmelt Infiltration into Frozen Soil at Sites in the Discontinuous Permafrost Zone Near Mayo, Yukon Territory / by C.R. Bum Use of Periphyton Indices as a Biological Measure of Water Quality in Small Rivers / by E.A. Goncharevich Yukon and Northwest Territories Ground-Water Data Base / by P. Hardisty, V. Schilder, T. Dabrowski and J. Wells Some Aspects of Glacier Hydrology in China / by X. Hu and Z. Yang Modelled Estimates of Changes in the Water Balance of Forested Northern River Basins / by Yu.G. Motovilov and N.A. Nazarov Study of Surface Water Quality in the Northern Region Subject to Pollution / by A.N. Shammasov Response of Riverine and Lacustrine Biocenoses to Human Impact / by N.S. Zolotareva and M.A. Mordasov APPENDIX A: LIST OF PARTICIPANTS
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  • 23
    Series available for loan
    Series available for loan
    Boulder, Colo. : The Geological Society of America
    Associated volumes
    Call number: S 90.0006(174)
    In: Memoir / The Geological Society of America, 174
    Type of Medium: Series available for loan
    Pages: XI, 414 Seiten , Illustrationen, graphische Darstellungen, Karten
    ISBN: 0-8137-1174-6
    Series Statement: Memoir / The Geological Society of America 174
    Language: English
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  • 24
    Monograph available for loan
    Monograph available for loan
    Washington, DC : Mineralogical Society of America
    Call number: MR 22.94990
    Type of Medium: Monograph available for loan
    Pages: XII, 545 Seiten , Illustrationen, graphische Darstellungen
    Edition: 2. printing with minor revisions
    ISBN: 0-03-085155-6
    Language: English
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  • 25
    Call number: 10.1144/GSL.SP.1990.053.01.23 (e-book)
    In: Special publications / the Geological Society, London, No. 53
    Description / Table of Contents: This volume examines the processes responsible for sedimentation in modern glacimarine environments, and how such modern studies can be used as analogues in the interpretation of ancient glacimarine sequences. Sediments released from glaciers grounded in tidewater, floating ice shelves, ice tongues, icebergs and sea ice form complex sequences governed by glaciological, oceanographic, sedimentary and biogenic controls. Ten per cent of the world’s oceans and epicontinental seas contain such active glacimarine environments, but during Cenozoic glacial periods this area was doubled. This book will, therefore, be of relevance to all scientists concerned with high and middle latitude marine environments. The early chapters are concerned largely with processes of sedimentation in modern glacimarine environments; examples are drawn from Alaska, the Canadian Arctic, Svalbard and Antarctica. Studies of ancient sequences, both Cenzoic and pre-Cenozoic, from the Barents Sea, Greenland, Sweden, Alaska and the northwest European continental shelf, form the latter part of the book.
    Type of Medium: 12
    Pages: 1 Online-Ressource (VII, 423 Seiten) , Illustrationen
    Edition: First published
    ISBN: 0-903317-54-0
    Series Statement: Special publications / the Geological Society, London 53
    Language: English
    Note: Contents Julian A. Dowdeswell and James D. Scourse: Preface --- Julian A. Dowdeswell and James D. Scourse: On the description and modelling of glacimarine sediments and sedimentation / Geological Society, London, Special Publications, 53:1-13, doi:10.1144/GSL.SP.1990.053.01.01 --- G. S. Boulton: Sedimentary and sea level changes during glacial cycles and their control on glacimarine facies architecture / Geological Society, London, Special Publications, 53:15-52, doi:10.1144/GSL.SP.1990.053.01.02 --- Ross D. Powell: Glacimarine processes at grounding-line fans and their growth to ice-contact deltas / Geological Society, London, Special Publications, 53:53-73, doi:10.1144/GSL.SP.1990.053.01.03 --- Ellen A. Cowan and Ross D. Powell: Suspended sediment transport and deposition of cyclically interlaminated sediment in a temperate glacial fjord, Alaska, U.S.A. / Geological Society, London, Special Publications, 53:75-89, doi:10.1144/GSL.SP.1990.053.01.04 --- Eugene W. Domack: Laminated terrigenous sediments from the Antarctic Peninsula: the role of subglacial and marine processes / Geological Society, London, Special Publications, 53:91-103, doi:10.1144/GSL.SP.1990.053.01.05 --- Robert Gilbert: Rafting in glacimarine environments / Geological Society, London, Special Publications, 53:105-120, doi:10.1144/GSL.SP.1990.053.01.06 --- Julian A. Dowdeswell and Tavi Murray: Modelling rates of sedimentation from icebergs / Geological Society, London, Special Publications, 53:121-137, doi:10.1144/GSL.SP.1990.053.01.07 --- Paul R. Carlson, Terry R. Bruns, and Michael A. Fisher: Development of slope valleys in the glacimarine environment of a complex subduction zone, Northern Gulf of Alaska / Geological Society, London, Special Publications, 53:139-153, doi:10.1144/GSL.SP.1990.053.01.08 --- Alec E. Aitken: Fossilization potential of Arctic fjord and continental shelf benthic macrofaunas / Geological Society, London, Special Publications, 53:155-176, doi:10.1144/GSL.SP.1990.053.01.09 --- James P. M. Syvitski, K. William G. LeBlanc, and R. E. Cranston: The flux and preservation of organic carbon in Baffin Island fjords / Geological Society, London, Special Publications, 53:177-199, doi:10.1144/GSL.SP.1990.053.01.10 --- Ian J. Fairchild and Baruch Spiro: Carbonate minerals in glacial sediments: geochemical clues to palaeoenvironment / Geological Society, London, Special Publications, 53:201-216, doi:10.1144/GSL.SP.1990.053.01.11 --- C. M. T. Woodworth-Lynas and J. Y. Guigné: Iceberg scours in the geological record: examples from glacial Lake Agassiz / Geological Society, London, Special Publications, 53:217-233, doi:10.1144/GSL.SP.1990.053.01.12 --- Jens Bischof, Joachim Koch, Michaela Kubisch, Robert F. Spielhagen, and Jörn Thiede: Nordic Seas surface ice drift reconstructions: evidence from ice rafted coal fragments during oxygen isotope stage 6 / Geological Society, London, Special Publications, 53:235-251, doi:10.1144/GSL.SP.1990.053.01.13 --- Anders Solheim, Lars Russwurm, Anders Elverhøi, and Mona Nyland Berg: Glacial geomorphic features in the northern Barents Sea: direct evidence for grounded ice and implications for the pattern of deglaciation and late glacial sedimentation / Geological Society, London, Special Publications, 53:253-268, doi:10.1144/GSL.SP.1990.053.01.14 --- Tore O. Vorren, Erland Lebesbye, and Kjell B. Larsen: Geometry and genesis of the glacigenic sediments in the southern Barents Sea / Geological Society, London, Special Publications, 53:269-288, doi:10.1144/GSL.SP.1990.053.01.15 --- D. Huddart and J. D. Peacock: Early Holocene morainal bank sedimentology and marine ecology, Skjoldungebrae gorge, North Scoresby Land, East Greenland / Geological Society, London, Special Publications, 53:289-305, doi:10.1144/GSL.SP.1990.053.01.16 --- Rodney L. Stevens: Proximal and distal glacimarine deposits in southwestern Sweden: contrasts in sedimentation / Geological Society, London, Special Publications, 53:307-316, doi:10.1144/GSL.SP.1990.053.01.17 --- A. R. Lord: The Pleistocene—Holocene transition in Southwestern Sweden and the recognition of deglaciation effects in adjacent seas / Geological Society, London, Special Publications, 53:317-328, doi:10.1144/GSL.SP.1990.053.01.18 --- J. D. Scourse, W. E. N. Austin, R. M. Bateman, J. A. Catt, C. D. R. Evans, J. E. Robinson, and J. R. Young: Sedimentology and micropalaeontology of glacimarine sediments from the Central and Southwestern Celtic Sea / Geological Society, London, Special Publications, 53:329-347, doi:10.1144/GSL.SP.1990.053.01.19 --- M. S. Stoker: Glacially-influenced sedimentation on the Hebridean slope, northwestern United Kingdom continental margin / Geological Society, London, Special Publications, 53:349-362, doi:10.1144/GSL.SP.1990.053.01.20 --- Carolyn H. Eyles and Martin B. Lagoe: Sedimentation patterns and facies geometries on a temperate glacially-influenced continental shelf: the Yakataga Formation, Middleton Island, Alaska / Geological Society, London, Special Publications, 53:363-386, doi:10.1144/GSL.SP.1990.053.01.21 --- A. C. M. Moncrieff and M. J. Hambrey: Marginal-marine glacial sedimentation in the late Precambrian succession of East Greenland / Geological Society, London, Special Publications, 53:387-410, doi:10.1144/GSL.SP.1990.053.01.22
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  • 26
    Call number: AWI G3-22-94975
    Type of Medium: Series available for loan
    Pages: XIII, 263 Seiten , Illustrationen , 1 Karte
    Edition: First edition 1983, reprinted edition 1993
    Series Statement: Guidebook / Division of Geological & Geophysical Surveys, Department of Natural Resources, State of Alaska 1
    Language: English
    Note: Kartenbeilage unter dem Titel: Physiographic map and field trip localities of the Upper Cook Inlet area, Alaska / compiled by R. D. Reger and R. G. Updike (1982) , CONTENTS Introduction General statement Organization and acknowledgments Selected references Middle Tanana River valley R&sum& of the permafrost and Quaternary geology Road log and locality descriptions Selected references Delta River area. Alaska Range R&sum& of the permafrost and Quaternary geology Road log and locality description Trans-Alaska Pipeline System Thawing problems Construction modes Conventional burial Special burial Conventional elevated and anchor support Selected references Copper River basin Rèsumè of Quaternary geology Road log and locality description Gakona section Richardson Highway Simpson Hill roadcut Copper River Bluff section Glenn Highway Selected references Overview of the Matanuska Glacier Selected references Upper Cook Inlet region and the Matanuska Valley Introduction Physiography and geology Upper Cook Inlet region Matanuska Valley Climate Vegetation. Soils Rèsumè of Quaternary geology General statement Late Pliocene-early Pleistocene glaciations and interglaciations Mt. Susitna Glaciation Mt. Susitna-Caribou Hills interglaciation Caribou Hills Glaciation Late Pleistocene glaciations and interglaciations Caribou Hills-Eklutna interglaciation Eklutna Glaciation Eklutna-Knik interglaciation Knik Glaciation Knik-Naptowne nonglacial interval Naptowne Glaciation Early Holocene Glaciations Middle to Late Holocene events Alaskan Glaciation Tustumena advances Tunnel advances Other events Road log and locality descriptions Selected references Appendix A - Radiocarbon dates related to late Quaternary events in the Upper Cook Inlet region, Alaska
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  • 27
    Call number: MR 22.94995
    Type of Medium: Monograph available for loan
    Pages: 195 Seiten , Illustrationen, graphische Darstellungen, Karten
    Edition: First edition
    ISBN: 7-116-01128-5
    Language: English
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  • 28
    Call number: AWI G4-22-94988
    Type of Medium: Monograph available for loan
    Pages: 130 Seiten , Illustrationen , Errata , 28 cm
    Series Statement: Annual progress report / Sanitary Engineering Research Laboratory, University of California 1
    Language: English
    Note: TABLE OF CONTENTS I INTRODUCTION II SUMMARY OF METHODS OF GROUND WATER DETECTION A. Geophysical Methods Gravimetric Method Magnetic Method Seismic Method Electrical Resistivity Method Electrical, Radioactive and Temperature Logging Methods B. Tracer Methods Dyes as Ground Water Tracers Tracers Detected by Chemical Determinations Radioactive Tracers III LABORATORY AND FIELD STUDIES OF GROUND WATER TRACERS Ion Exchange in Soils Lysimeter Studies of Fluorescein, Chloride and Iodine-131 Comparison of Stable and Radioactive Calcium Tritium Studies Injection Well Studies of Fluorescein, Dextrose, and Iodine-131 IV CONCLUSIONS AND RECOMMENDATIONS A. Geophysical Methods B. Tracer Methods V ABSTRACT OF LITERATURE PERTAINING TO GROUND WATER DETECTION A. Geophysical Methods B . Tracer Methods
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  • 29
    Call number: AWI G5-23-95000
    Type of Medium: Monograph available for loan
    Pages: xii, 169 Seiten , Illustrationen
    Language: English
    Note: Masterarbeit, Queen's University (Kingston, Ont.), 1990 , TABLE OF CONTENTS ABSTRACT ACKOWLEDGEMENTS LIST OF FIGURES LIST OF TABLES CHAPTER 1: INTRODUCTION 1.1 Purpose of Study 1.2 Site Description 1.2.1 Climate 1.2.2 Geology 1.2.3 Late Cenozoic Evolution of the Queen Elizabeth Islands 1.2.4 Origin of Colour Lake 1.2.5 Lake and Basin Morphometry and Morphology CHAPTER 2: LITERATURE REVIEW 2.1 General Arctic Limnology 2.1.1 Thermal Regimes and Circulation 2.1.2 Biological Limnology 2.2 Sedimentation in Arctic Lakes 2.2.1 Sedimentary Processes 2.2.2 Deposits 2.3 Phycology and Paleophycology of High Arctic Lakes CHAPTER 3: METHODS 3.1 Basin Factors 3.1.1 Weather 3.1.2 Stream Sampling 3.1.3 Snowmelt, Depth of Ground Thaw, and Soil parameters 3.1.4 Measurement of Mass Wasting 3.2 General Limnology 3.3 Sediment Sampling and Analysis 3.3.1 Sediment Collection 3.3.2 Sediment Analysis 3.3.3 Microfossil Analysis 3.3.3.1 Diatoms and Chrysophytes 3.3.3.2 Chironomids CHAPTER 4: RESULTS 4.1 Basin Factors 4.1.1 Weather 4.1.2 Stream Discharge and Water Quality 4.1.3 Snow, Active Layer Thickness, and Soil Parameters 4.1.4 Mass Wasting 4.1.4.1 Gelifluction survey 4.1.4.2 Mudflows and other Observations 4. 2 Limnology 4.2.1 General Limnology - 1987 4.2.1.1 Lake Temperature 4.2.1.2 Lake Chemistry 4.2.1.3 Water Stage 4.2.1.4 Suspended Sediment 4.2.1.5 Algae 4.2.2 General Limnology - 1988 4.3 Sedimentology 4.3.1 Surficial Sediments 4.3.1.1 Structure and Grain Size 4.3.1.2 Organic Matter 4.3.1.3 Microfossils 4.3.2 Long Cores 4.3.2.1 Structure and Grain Size 4.3.2.2 Organic Matter 4.3.2.3 Dating 4.3.2.4 Microfossils CHAPTER 5: DISCUSSION 5.1 Basin Factors 5.1.1 Inflows 5.1.2 Mass Wasting 5.1.2.1 Rates of Soil Movement 5.1.2.2 Gelifluction as a Sediment Source 5.2 Limnology 5.3 Sedimentology 5.3.1 Recent Sedimentary Environment 5.3.2 Late Holocene Sedimentary Environment 5.3.2.1 Signal from Alluvial Fan River 5.3.2.2 Signal from Gelifluction 5.3.2.3 Signal from Lake Ice Cover 5.2.3.4 General Sedimentology 5.2.3.5 Paleophycology 5.3.3 Modelling Colour Lake Sedimentology . CHAPTER 6: CONCLUSIONS REFERENCES APPENDIX A: CORRECTION OF TALL BURIED STAKES APPENDIX B: TEST OF EFFECT OF IGNITION BEFORE SEDIGRAPHING APPENDIX C: DIATOM SPECIES LIST APPENDIX D: SEDIMENT VOLUME IN A SMALL MUDFLOW APPENDIX E: ICE RECORD VITA
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  • 30
    Monograph available for loan
    Monograph available for loan
    St. John's : Geological Association of Canada
    Call number: MR 24.95645
    Type of Medium: Monograph available for loan
    Pages: v, 194 Seiten , Illustrationen , 28 cm
    Edition: Second printing
    ISBN: 091921634X , 0-919216-34-X
    Series Statement: Geoscience Canada reprint series 3
    Language: English
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  • 31
    Call number: MR 24.95646
    Type of Medium: Monograph available for loan
    Pages: 27 Seiten , Illustrationen
    ISBN: 9171469311
    Series Statement: Report / University of Stockholm, Department of Quaternary Research 20
    Language: English
    Note: Zugl.: Stockholm, Univ., Diss., 1991
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  • 32
    Monograph available for loan
    Monograph available for loan
    Cambridge : University Press
    Call number: AWI G1-19-92304
    Type of Medium: Monograph available for loan
    Pages: XVI, 420 Seiten , Illustrationen
    Edition: Fourth edition
    Language: English
    Note: Contents: I The mechanical properties of rocks. - II The theory of elastic waves. - III Observational seismology. - IV The theory of the figures of the earth and moon. - V The figures of the earth and moon. Discussion of observations. - VI Stress-differences in the earth. - VII The variation of latitude and the bodily tide. - VIII Tidal friction. - IX The age of the earth. - X The thermal history of the earth. - XI The origin of the earth's surface features. - XII Special problems. - Appendices. - A Critical stress-difference. - B The straining of a uniform sphere. - C Castigliano's principle. - D Cooling of a sphere. - E Long-period tides. - Notes. - Bibliography. - Index.
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  • 33
    Monograph available for loan
    Monograph available for loan
    Copenhagen : [Verlag nicht ermittelbar]
    Call number: AWI G7-19-92326
    Type of Medium: Monograph available for loan
    Pages: 59 Seiten , Illustrationen
    Language: English
    Note: CONTENTS: Report on the 1995 activities of GRIP Operation Center (GOC). - Objective. - Kangerlussuaq (Søndre Strømfjord). - Preparation of field season. - Start of field season. - Communication. - Medevac. - Acknowledgement. - 1995 Field Season, Diary. - Maintenance / Logistics. - Bulk supplies. - Table of C130 flights. - Table of Twin Otter flights. - List of participants. - GRIP 1995 sub programs. - GRIP summaries 1989-1995. - GOC documentation 1989-1994. - Sitreps. - Daily reports from DOME GRIP. - Map of Northern Greenland. - List of GRIP addresses. - Tasks of GOC.
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  • 34
    facet.materialart.13
    facet.materialart.13
    [Philadelphia] : American Meteor Society
    Call number: MOP S 7298
    In: Meteoritics
    Type of Medium: 13
    Pages: Seite 366-385 , Tabellen
    Edition: Sonderdruck reprinted from Meteoritics Vol. 1, No. 3, 1955
    Series Statement: Meteoritics Vol. 1, No. 3
    Language: English
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  • 35
    Monograph available for loan
    Monograph available for loan
    Beirut : Librairie du Liban
    Call number: 1.2/M 18.91851
    Type of Medium: Monograph available for loan
    Pages: 1006 Seiten , Illustrationen
    ISBN: 9789953100005
    Language: English , Arabic
    Note: Text in Englisch und Arabisch
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  • 36
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-92/17
    In: CRREL Report, 92-17
    Description / Table of Contents: The CRREL Instrumented Vehicle (CIV), shear annulus, direct shear, andtriaxial compression devices were used to characterize the strength ofthawed and thawing soil. These strength values can be used in simpletraction models to predict the tractive performance of vehicles. Strength was evaluated in terms of the parameters c' and Φ' based on the Mohr-Coulomb failure criterion. It is proposed here that an instrumented vehicle is best suited for terrain characterization for mobility studies because the conditions created by a tire slipping on a soil surface are exactly duplicated. The c' and Φ' values from the shear annulus were found to overpredict traction because of the low normal stress applied by the annulus and the curved nature of the failure envelope. Of all the tests, the direct shear test yielded the highest Φ' value, most likely because the test was run at a slow deformation rate under drained conditions. The triaxial test results were the most similar to those from the vehicle. All test methods show Φ' increasingwith soil moisture up to the liquid limit of the soil and then decreasing. As measured with the vehicle, was also found to be strongly influenced by the thaw depth.
    Type of Medium: Series available for loan
    Pages: 17 Seiten , Illustrationen
    Series Statement: CRREL Report 92-17
    Language: English
    Note: CONTENTS Introduction Objective Background Strength measurement techniques Triaxial compression Direct shear Shear annulus device CRREL Instrumented Vehicle Discussion Comparison of methods Influence of soil conditions Traction prediction Conclusions References Abstract
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  • 37
    Call number: ZSP-201-94/12
    In: CRREL Report, 94-12
    Description / Table of Contents: Subsurface radar was used to profile ice and snow conditions on the Ross Ice Shelf at McMurdo Station, Antarctica, during mid-January 1993. Deconvolution and migration were often used to improve vertical resolution and spatial imaging. Profiles at a pulse center frequency of 400 MHz along the 3.2-km-long Pegasus ice runway show many low-density horizons above 9 m depth that are up to 30 m long. They are associated with air bubbles included during refreezing of meltwater and are interpreted as layers between a few and tens of centimeters thick. There is a strong reflecting horizon at about 9 m depth that is probably from brine intrusion as it is continuous with the intrusion into the snow to the east. Diffraction asymptotes give a dielectric constant near 3.2 for material above the brine level, a value that implies near-solid ice. Profiles at 100 MHz along the road between Pegasus runway and Williams Field in the accumulation zone show snow features such as layer deformation and intrusive brine layers that both abruptly and gradually change in depth. A single profile at a relic solid waste dump at Williams Field detected buried debris and ice within the upper 7 m. A survey of a suspected fuel spill shows some local disturbances near the center, but no excavation was done to verify the findings. Profiles traversing the sewage sumps at Williams Field outline the extent of the sewage deposition, and give depths to contaminated snow that closely agree with observation. Despite variability in dielectric properties, single-layer migration effectively improves the resolution of subsurface conditions. Recommendations are made for future surveys.
    Type of Medium: Series available for loan
    Pages: iv, 29 Seiten , Illustrationen
    Series Statement: CRREL Report 94-12
    Language: English
    Note: CONTENTS Preface Introduction Radar equipment General operation Antennas Waveforms and phase polarity Antenna directivity Field procedures and data processing Field procedures Data recording Data processing Site location Results Pegasus runway Access road from Williams Field to Pegasus runway Williams Field Summary and conclusions Literature cited Appendix A: Airborne profile of a portion of the access road Abstract
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  • 38
    Call number: PIK W 510-19-92837
    Type of Medium: Monograph available for loan
    Pages: VIII, 62 Seiten , Illustrationen, Diagramme, Karten
    ISBN: 9529844026
    Series Statement: Working paper / European Forest Institute 3
    Language: English
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  • 39
    Monograph available for loan
    Monograph available for loan
    Nerja : Patronato de la Cueva de Nerja
    Call number: AWI G1-19-92413
    Type of Medium: Monograph available for loan
    Pages: 354 Seiten , Illustrationen
    Series Statement: Trabajos sobre la Cueva de Nerja 3
    Language: Spanish
    Note: ÍNDICE PRESENTACIÓN INTRODUCCIÓN INTRODUCTION ESTUDIO GEOLÓGICO DEL ENTORNO DE LA CUEVA DE NERJA l. INTRODUCCIÓN 1.1. Localización geográfica 1.2. Metodología de trabajo 1.3. Objetivos 2. ENCUADRE GEOLÓGICO GENERAL 3. ANTECEDENTES 4. ESTRATIGRAFÍA 4.1. Materiales alpujárrides 4.1.1. Manto de Almijara (Alpujárride Intermedio) 4.1.1.1. Esquistos oscuros 4.1.1.2. Esquistos claros 4.1.1.3. Calcosquistos 4.1.1.4. Mármoles de la base 4.1.1.5. Mármoles con intercalaciones de esquistos y calcosquistos 4.1.2. Manto de Guájares (Alpujárride Superior) 4.1.2.1. Esquistos oscuros 4.1.2.2. Esquistos claros 4.1.2.3. Mármoles 4.2. Materiales Neógeno-Cuaternarios 4.2.1. Unidad inferior pliocena 4.2.2. Unidad superior pliocena 4.2.3. Unidad pleistocena 4:2.3.1. Brechas y conglomerados 4.2.3.2. Gravas, arenas y limos 4.2.3.3. Travertinos 4.2.3.4. Depósitos litoquímicos 4.2.4. Unidad Holocena 5. ESTRUCTURA GEOLÓGICA 6. HISTORIA GEOLÓGICA BIBLIOGRAFÍA ANÁLISIS ESTRATIGRÁFICO DE LOS MATERIALES NEÓGENOCUATERNARIOS DE LA REGIÓN DE NERJA 1. INTRODUCCIÓN 2. ESTRATIGRAFÍA 2.1. Brechas rojas basales 2.2. Unidad inferior pliocena 2.2.1. Facies continentales de la Unidad inferior pliocena 2.2.2. Facies marinas de la Unidad inferior pliocena 2.2.3. Medio de depósito 2.3. Discordancia intrapliocena 2.4. Unidad superior pliocena 2.4.1. Facies marinas de la Unidad superior pliocena 2.4.2. Facies continentales de la Unidad superior pliocena 2.4.3. Medio de depósito 2.5. Unidad pleistocena 2.5.1. Descripción de los materiales 2.5.2. Medio de depósito y edad de los materiales 2.6. Otros materiales atribuibles al Pleistoceno 2.6.1. Travertinos 2.6.2. Facies detrítcias y cabonatadas del cruce de la carretera de la Cueva 2.7. Materiales del Holoceno 3. EVOLUCIÓN TECTOSEDIMENTARIA y PALEOGEOGRÁFICA 4. CONCLUSIONES BIBLIOGRAFÍA LA FRACTURACIÓN EN EL ENTORNO DE LA CUEVA DE NERJA 1. INTRODUCCIÓN 1.1. Antecedentes 1.2 Estructura del entorno de la Cueva de Nerja 2. RASGOS GENERALES DE LA FRACTURACIÓN 3. ESTUDIO DE LAS FALLAS 3.1. Las fallas mesoscópicas 3.2. Las grandes fallas 4. ESTUDIO DE LAS DIACLASAS 4.1. Resultado del estudio de la diaclasación en el entorno de la Cueva de Nerja 4.2. Estudio de la diaclasación en el interior de la Cueva 5. COMPARACIÓN DE LOS RESULTADOS OBTENIDOS EN LAS DIACLASAS Y FALLAS 6. ALGUNOS DATOS ACERCA DE LA CRONOLOGÍA DE LA FRACTURACIÓN E IMPORTANCIA DE LA MISMA 7. CONTROLES GEOLÓGICOS DE LA CUEVA DE NERJA: INFLUENCIA DE LA FRACTURACIÓN 8. CONCLUSIONES BIBLIOGRAFÍA ESTUDIO GEOMORFOLÓGICO DEL ENTORNO DE LA CUEVA DE NERJA 1. INTRODUCCIÓN 2. SÍNTESIS GEOLÓGICA Y ÁMBITO BIOCLIMÁTICO 3. ANÁLISIS MORFOMÉTRICO Y DE LA RED DE DRENAJE 3.1. Consideraciones previas. Rasgos hidrográficos generales 3.2. Características de forma 3.3. Características de relieve 3.4. Análisis de la red de drenaje 4. RASGOS GENERALES DEL MODELADO EN EL CONJUNTO MONTAÑOSO 4.1. Erosión hídrica y formas estructurales 4.2. Periglaciarismo y glaciarismo 4.3. Morfologías kársticas 5. EL PIEDEMONTE LITORAL: FORMAS Y PROCESOS 5.1. Morfologías relacionadas con las brechas pleistocenas 5.2. Otras morfologías 6. BOSQUEJO DE EVOLUCIÓN GEOMORFOLÓGICA. PROCESOS ACTUALES BIBLIOGRAFÍA ESTUDIO HIDROGEOLÓGICO DEL ENTORNO DE LA CUEVA DE NERJA 1. INTRODUCCIÓN 2. ANTECEDENTES 3. MARCO CLIMÁTICO 3.1. Precipitciones 3.2. Temperaturas 4. HIDROLOGÍA SUPERFICIAL 5. EL ACUÍFERO DE LAS ALBERQUILLAS 5.1. Descripción 5.2. Puntos de Agua 5.2.1. Pozos perforados 5.2.1.1. Piezometría 5.2.2. Manantiales 5.2.2.1. El manantial de Maro 5.3. Hidrogeoquímica 5.3.1. Aplicación de la hidroquímica a la investigación hidrogeológica 5.3.1.1. Distribución espacial 5.3.1.2. Evolución temporal 5.3.2. Aplicación de la hidroquímica a la karstogénesis 5.3.2.1. El sistema calcocarbónico 5.4. Funcionamiento del acuífero 6. LA CUEVA DE NERJA EN EL ACUÍFERO DE LAS ALBERQUILLAS BIBLIOGRAFÍA INTRODUCCIÓN A LA PETROLOGÍA DE LOS MÁRMOLES DE LA CUEVA DE NERJA Y MATERIALES ASOCIADOS 1. INTRODUCCIÓN 2. CONTEXTO GEOLÓGICO 3. DESCRIPCIÓN DE LAS ROCAS Y PETROGRAFÍA 3.1. Rocas Carbonáticas 3.1.1. Mármoles dolomíticos puros 3.1.2. Mármoles dolomíticos impuros 3.1.3. Mármoles calcíticos y rocas con silicatos cálcicos 4. COMPOSICIÓN QUÍMICA DE LOS MINERALES 5. EVOLUCIÓN METAMÓRFICA 5.1. Antecedentes 5.2. Metamorfismo de las rocas carbonáticas 5.3. Condiciones del metamorfismo 6. CONCLUSIONES BIBLIOGRAFÍA DATACIONES GEOCRONOLÓGICAS ABSOLUTAS (Métodos E.S.R. y Series de Uranio) EN LA CUEVA DE NERJA Y SU ENTORNO. IMPLICACIONES EVOLUTIVAS, PALEOCLIMÁTICAS Y NEOSISMOTECTÓNICAS 1. INTRODUCCIÓN 2. METODOLOGÍA 2.1. Campaña de muestreo 2.2. Métodos geocronológicos empleados 3. LOCALIZACIÓN Y DESCRIPCIÓN DE LAS MUESTRAS 3.1. Muestras del interior de la Cueva de Nerja 3.2. Muestras de depósitos sedimentarios del entorno exterior 4. RESULTADOS OBTENIDOS Y DISCUSIÓN 5. CONCLUSIONES: IMPLICACIONES EVOLUTIVAS, PALEOCLIMÁTICAS Y NEOSISMOTECTÓNICAS 5.1. Relativas a la evolución de la Cueva de Nerja 5.2. Relativas a la edad de algunos materiales del entorno 5.3. Relativas a los cambios paleoclimáticos de la región 5.4. Relativas a la neosismotectónica de la región BIBLIOGRAFÍA . ESTUDIO DE LA VENTILACIÓN DE LA CUEVA DE NERJA MEDIANTE LA CONCENTRACIÓN DE RADÓN 1 INTRODUCCIÓN 1.1. Radioactividad Natural 1.2. Cómo se puede medir la concentración en Rn 1.3. Exhalación en Rn del suelo 1.4. Método para evaluar la ventilación 2 DISPOSITIVO EXPERIMENTAL 2.1. Toma de muestras de aire 2.2. Medida del contenido en Rn de las células 2.3. Medida de la temperatura del aire de la Cueva 3 RESULTADOS 3.1. Concentración de Rn en la Cueva 3.2. Temperatura del aire en la Cueva 3.3. Evaluación del índice de ventilación BIBLIOGRAFIA CARACTERIZACIÓN ISOTÓPICA Y ANÁLISIS DE LOS PROCESOS DE DEGRADACIÓN DE LOS MATERIALES CARBONATADOS DE LA CUEVA DE NERJA. ESTUDIO PRELIMINAR 1. INTRODUCCIÓN 1.1. Antecedentes 1.2. Localización geológica y materiales estudiados 2. METODOLOGÍA 2.1. Muestreo 2.2. Estudio de laboratorio 2.2.1. Análisis mineralógico 2.2.2. Isótopos estables 2.2.3. Elementos traza 2.2.4. Microscopía electrónica de barrido 3 RESULTADOS OBTENIDOS 3.1. Espeleotemas 3.2. Roca encajante 3.3. Travertinos 3.4. Mustras de agua 4. INTERPRETACIÓN Y DISCUSIÓN DE LOS RESULTADOS 4.1. Isótopos estables 4.2. Estudio de las alteraciones 4.2.1. Procesos de alteración de carbonatos 4.2.2. Estudio de elementos traza 4.2.3. Estudio mineralógico 5 CONCLUSIONES AGRADECIMIENTOS BIBLIOGRAFÍA ESTUDIO GEOQUÍMICO DE LAS AGUAS DE INFILTRACIÓN DE LA CUEVA DE NERJA 1. INTRODUCCIÓN 2. METODOLOGÍA DE TRABAJO 2.1. Trabajo de campo 2.2. Trabajo de laboratorio 2.3. Trabajo de gabinete 3. LOS CAUDALES DE GOTEO 4. LOS PARÁMETROS FÍSICO-QUÍMICOS: (pH, TEMPERATURA y CONDUCTIVIDAD) 5. LA INFORMACIÓN HIDROGEOQUÍMICA 5.1. La química de los carbonatos 5.1.1. Los equilibrios calco-carbónicos, el pH de equilibrio y la presión parcial de CO2 5.1.2. La pC02 de las aguas de infiltración 5.1.3. El dpH de las aguas de infiltración 5.2. Las distintas clases de agua 5.3. Consideraciones sobre algunos componentes químicos de interés en las aguas de infiltración sensu stricto 5.3.1. Iones procedentes mayoritariamente del agua de lluvia 5.3.1.1. Cloruros (Cl-) 5.3:1.2. Sílice(SiO2) 5.3.1.3. Nitratos (NO3) 5.3.1.4. Sulfatos (SO4) 5.3.2. Iones procedentes fundamentalmente de los materiales acuíferos 5.3.2.1. Alcalinidad total (TAC) 5.3.2.2. Relación CA2+/Mg2+ 6. ALGUNOS ASPECTOS PARA LA CONSERVACIÓN DE LA CUEVA 7. CONCLUSIONES BIBLIOGRAFÍA MEDIDAS TOPOGRÁFICAS DE PRECISIÓN PARA CONTROL DE MICRODEFORMACIONES EN EL TECHO DE LA CUEVA DE NERJA 1. INTRODUCCIÓN 2. DESCRIPCIÓN DEL SISTEMA 3. MEDIDAS DE IMPLANTACIÓN 4. ALTIMETRÍA 5. RESULTADOS Y CONCLUSIONES AGRADECIMIENTOS BIBLIOGRAFÍA . , In spanischer Sprache , Zusammenfassung in englischer Sprache
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  • 40
    Call number: MOP 41324/I / Mitte
    Type of Medium: Monograph available for loan
    Pages: 162 Seiten
    Language: English
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  • 41
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-93/3
    In: CRREL Report, 93-3
    Description / Table of Contents: Results are presented of a study to determine appropriate methods of flow modification for mitigating ice jam formation in navigable rivers. Based on a review of alternative methods for flow modification, it is concluded that for many rivers, especially large ones, the most appropriate method involves controlled ice-cover formation through the regulation of river flow. Flow discharge and stages would be regulated by controlling the flow releases from reservoirs and flow stages at river dams, such that optimal flow conditions prevail for rapid formation, and subsequent maintenance, of an accumulation ice cover over river reaches in which potentially large amounts of frazil ice may grow. Accumulation covers would be formed of frazil ice pans and floes and, if appropriate, broken ice conveyed from upstream. Existing dams, augmented where needed by navigable ice booms, could serve as retention structures for the development of accumulation covers. A preliminary indication of the feasibility of this method for controlling ice-cover formation on stage-regulated pools of the Ohio River is assessed through the use of a numerical model that simulates ice-cover formation from frazil ice. It is found that this approach holds promise for mitigating jam occurrence, although its implementation necessarily entails management of flow through major portions of the Ohio River. The results of the study are, to a limited extent, generalized to other rivers.
    Type of Medium: Series available for loan
    Pages: v, 58 Seiten , Illustrationen
    Series Statement: CRREL Report 93-3
    Language: English
    Note: CONTENTS Preface Nomenclature Introduction Background Scope of the study Control of river ice formation Control methods Controlled ice-cover formation for the upper Ohio River Numerical simulation of ice-cover formation Flow profile Water temperature variation Frazil ice growth Ice-cover progression Thermal growth of ice cover Numerical results Illustration of simulated ice-:over formation Ice-cover formation in the Hannibal and Montgomery pools Generalized results Conclusions and recommendations Literature cited Appendix A: Expression for coefficients Appendix B: Listing of computer program
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  • 42
    Monograph available for loan
    Monograph available for loan
    Dordrecht : Springer | New York [u.a.] : Chapman & Hall
    Call number: AWI G3-20-93489
    Description / Table of Contents: Frozen Ground Engineering first introduces the reader to the frozen environment and the behavior of frozen soil as an engineering material. In subsequent chapters this information is used in the analysis and design of ground support systems, foundations, and embankments. These and other topics make this book suitable for use by civil engineering students in a one-semester course on frozen ground engineering at the senior or first-year-graduate level. Students are assumed to have a working knowledge of undergraduate mechanics (statics and mechanics of materials) and geotechnical engineering (usual two-course sequence). A knowledge of basic geology would be helpful but is not essential. This book will also be useful to advanced students in other disciplines and to engineers who desire an introduction to frozen ground engineering or references to selected technical publications in the field. BACKGROUND Frozen ground engineering has developed rapidly in the past several decades under the pressure of necessity. As practical problems involving frozen soils broadened in scope, the inadequacy of earlier methods for coping became increasingly apparent. The application of ground freezing to geotechnical projects throughout the world continues to grow as significant advances have been made in ground freezing technology. Freezing is a useful and versatile technique for temporary earth support, groundwater control in difficult soil or rock strata, and the formation of subsurface containment barriers suitable for use in groundwater remediation projects.
    Type of Medium: Monograph available for loan
    Pages: x, 352 Seiten , Illustrationen
    ISBN: 978-1-4757-2292-5
    Language: English
    Note: Contents PREFACE CHAPTER 1. FROZEN GROUND 1.1 Frozen ground support systems Frozen earth wall Design considerations 1.2 Seasonally and perennially frozen ground Cold regions: definition Subsurface temperatures Active layer, Permafrost 1.3 Terrain features in permafrost areas Ground ice features Patterned ground 1.4 Engineering considerations Freezing process Thawing of frozen ground Frost action Useful aspects of frozen ground Ice as a construction material Problems CHAPTER 2. PHYSICAL AND THERMAL PROPERTIES 2.1 Composition and structure of frozen ground Soil types Phase relationships Ice phase Particle size and size distribution Consistency of cohesive soils 2.2 Soil classification Unified soil classification system Frozen soil classification 2.3 Water-ice phase relationships Unfrozen water in frozen soil Effect of solutes on freezing 2.4 Soil frost action Frost action process Frost susceptibility of soils Frost-heave forces Freeze-thaw effects on permeability 2.5 Thermal properties Thermal conductivity Heat capacity Thermal diffusiuity Latent heat of fusion Thermal expansion (or contraction) Problems CHAPTER 3. HEAT FLOW IN SOILS 3.1 Heat transfer at the ground surface Climatic factors Freezing (or thawing) indices Surface n-factor 3.2 Seasonal ground freezing (or thawing) Frost depth Thawing of frozen soil Design implications 3.3 Temperature below cooled (or heated) areas Steady state heat flow Transient temperatures Periodic heat flow 3.4 Thermal analysis: frozen ground support systems Single freeze pipe Wall formation Multiple rows of freeze pipes Problems CHAPTER 4. THAW BEHAVIOR OF FROZEN GROUND 4.1 Thaw settlement 4.2 Consolidation of thawing soils Thaw consolidation Residual stress in thawing soils 4.3 Thaw-consolidation in some layered systems Two layer soil problems Compressible soil ouer discrete ice layers Problems CHAPTER 5. MECHANICAL PROPERTIES OF FROZEN SOILS 5.1 Stress-strain-time and strength behavior Hydrostatic pressure effect on frozen soil behavior Shear stress effect on frozen soil behavior 5.2 Factors influencing creep and strength Creep of frozen soil under constant stress Stress-strain behavior under constant strain rate Ice content effect on strength Normal pressure effect on strength Strain rate effect on strength Temperature effect on strength Frozen soil behauior at cryogenic temperatures 5.3 Analytical representation of creep and strength data General creep equation Strength of frozen soils Comparison with Vyalou's creep and strength equations Normal pressure effect on creep and strength Salinity effect on frozen soil creep and strength 5.4 Frozen soil behavior in uniaxial tension 5.5 Deformability of frozen soils 5.6 Compressibility of frozen soils Problems CHAPTER 6. CONSTRUCTION GROUND FREEZING 6.1 Design considerations Ground freezing applications Soil conditions Groundwater flow Ground movement 6.2 Freezing methods and system installation Primary plant and pumped loop secondary coolant Expendable liquid refrigerant Installation of the cooling system 6.3 Structural design of frozen earth walls Curved walls Straight walls and combinations Tunnels Finite-element method 6.4 Monitoring requirements Freeze hole deviation Temperature Frost boundary location and wall thickness 6.5 Other construction considerations Protection of exposed frozen earth Concrete placement against frozen earth Problems CHAPTER 7. FOUNDATIONS IN FROZEN SOILS 7.1 General considerations Foundations in seasonally frozen ground Foundations in permafrost 7.2 Shallow foundations Selection of foundation method Design of shallow foundations Bearing capacity Settlement considerations 7.3 Pile foundations Pile types Pile placement Pile freezeback Axially loaded piles Laterally loaded piles Anchors in frozen ground 7.4 Frost-heave forces on foundations Tangential forces on a vertical surface Design for frost heave Problems CHAPTER 8. STABILITY OF SOIL MASSES IN COLD REGIONS 8.1 Landslides in permafrost: classification 8.2 Slopes in thawing permafrost Low-angle planar flows Slides 8.3 Slopes in frozen soils 8.4 Slope stabilization methods Construction and design techniques Stabilization of planar slides Stabilization of cut slopes Problems CHAPTER 9. EARTHWORK IN COLD REGIONS 9.1 Site considerations Drainage Thermal and frost action factors Subsurface conditions Material sources 9.2 Excavation and transport Mechanical excavation Drilling and blasting Thawing frozen soil Hydraulic dredging 9.3 Field placement Compaction Placement in water 9.4 Water-retaining embankments on permafrost Unfrozen embankments Frozen embankments Maintaining the frozen state Thermal and stability considerations 9.5 Embankment performance Frost heave Settlement Stability Artificial islands CHAPTER 10. FIELD INVESTIGATIONS 10.1. Sampling frozen ground Sampling methods Sample protection 10.2 Ground-temperature measurement Temperature sensors and measuring equipment 10.3 Field testing of frozen soils Field test methods Pressuremeter test Deep static cone penetration test Other types of field tests 10.4 Geophysical methods Seismic velocities in frozen ground Electrical properties of frozen ground Geophysical techniques used in frozen ground High-frequency electrical methods Borehole logging in permafrost APPENDIX A. SYMBOLS APPENDIX B. SI UNITS APPENDIX C LABORATORY AND FIELD TESTS ON FROZEN SOILS C1 Handling, storage, and machining of specimens prior to testing C2 Uniaxial compression test C3 Uniaxial tensile test C.4 Salinity of soil pore water C5 Thermosiphon C6 Pile load test in permafrost REFERENCES AUTHOR INDEX SUBJECT INDEX
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  • 43
    Monograph available for loan
    Monograph available for loan
    [Reading] : European Centre for Medium Range Weather Forecasts
    Call number: MOP 47681 / Mitte
    Type of Medium: Monograph available for loan
    Pages: vii, 480 Seiten , Illustrationen , 30 cm
    Language: English
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  • 44
    Monograph available for loan
    Monograph available for loan
    Hong Kong : Royal Observatory
    Call number: MOP 47253(1989) / Mitte
    Type of Medium: Monograph available for loan
    Pages: 96, [2] Seiten , Illustrationen
    Language: English
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  • 45
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-18
    In: Research report / Cold Regions Research and Engineering Laboratory, 18
    Description / Table of Contents: Summary: Various strength properties of naturally compacted high-density snows, in the density range of from 0.40 to 0.75 g/cm^3, are reported. Test results are given for: unconfined compression; unconfined and confined double shear; ring, flexural, and centrifugal tensile strength; torsional shear; and work of disaggregation. The work of disaggregation per unit volume was related to crushing, tensile, and shear strength at various lateral pressures, using the same empirical relationship. The results of the various tests measuring the tensile strength of the snow compare favorably with each other. An attempt was made to use the direct shear strength results in Coulomb’s equation for the determination of Mohr’s envelope of rupture for snow. These tests yield higher values than those obtained in unconfined compression tests. However, angles of internal friction obtained considering Mohr’s envelope to be straight line seem to agree with measurements taken on an unconfined compression specimen.
    Type of Medium: Series available for loan
    Pages: 19 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 18
    Language: English
    Note: CONTENTS Page Preface Summary Introduction Temperature correction factors Crushing strength Tensile strength · Shear strength Torsional shear strength Work of disaggregation of snow Angle of internal friction and apparent unit cohesion Discussion of results References
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  • 46
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-17
    In: Research report / Cold Regions Research and Engineering Laboratory, 17
    Description / Table of Contents: Summary: The ice-cored moraine which occurs on the margin of the Greenland Ice Cap, east of Thule Air Base, was investigated during the summers of 1954 and 1955. A synthesis of the field data gathered leads to the following conclusions: 1.) The outer zone of the ice margin is composed of stagnant ice which acts as a barrier to movement of mobile ice from the interior. 2.) The mobile ice overrides the barrier zone in a series of high angle imbricate shears. 3.) These shears carry old ground moraine from the subglacial floor toward the surface. 4.) Differential ablation on the surface results in the formation of ice-cored moraine ridges, parallel to the strike of the shear. 5.) Recent stagnation and recession of the ice margin in the Thule area has resulted in the formation of a belt of successive shear moraines. 6.) Geomorphic processes in addition to ablation (particularly wind action) control the surface expression of the shear moraines. 7.) Subglacial topography is the primary control on the trend of both ice edge and moraine ridges. 8.) The complex Thule Ramp shear moraine has resulted from a faster-moving ice mass to the north overriding the Thule Ramp ice. 9.) The prominent ice cliffs are manifestations of erosion by wind and water. 10.) The tunnel in the Thule Ramp ice cliff indicates a former development of shear moraine in the area. 11.) Structural and geomorphic features indicate glacial cycles in the area of both long and short duration. 12.) The shear moraines in the Thule area offer a possible explanation for the mode of ground moraine deposition in some areas of continental glaciation during the late Pleistocene. The work done in 1954 and 1955 was in the nature of a glacial geomorphologic reconnaissance. Intensive study remains to be done, particularly in the Thule Ramp area, on ice structure, movement, and ablation before a complete understanding of both present and past glacial regimes can be reached.
    Type of Medium: Series available for loan
    Pages: vi, 46, [2] Seiten , Illustrationen , 27 cm
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 17
    Language: English
    Note: CONTENTS Introduction I. Physiographic description of study area II. Structure of the marginal zone of the ice cap III. Geomorphologic processes IV. Recent glacial history of the ice margin
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  • 47
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-34
    In: Research report / Cold Regions Research and Engineering Laboratory, 34
    Description / Table of Contents: Summary: The compressive strength of snow cylinders was investigated as a function of age of snow, snow-particle size, and age of the cylinders. The effect of gases such as carbon dioxide, methane, and ammonia on the strength of snow cylinders has also been studied. The experimental results show that the older the snow from which snow cylinders are made, the smaller the compressive strength. The compressive strength of cylinders decreases with the snow particle size. An equation describing the aging curves for snow cylinders is presented. Whereas carbon dioxide and methane in small quantities have no effect on the compressive strength, ammonia appreciably lowers the compressive strength of snow cylinders. All strength measurements were carried out at -10°C.
    Type of Medium: Series available for loan
    Pages: iv, 16 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 34
    Language: English
    Note: CONTENTS Page Preface Summary Introduction Experimental Materials Apparatus and technique Preparation of snow fractions Experimental results Aging of snow cylinders Compressive strength as a function of particle size Mixture of fractions Influence of gases on the compressive strength of snow Discussion References
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  • 48
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-37
    In: Research report / Cold Regions Research and Engineering Laboratory, 37
    Description / Table of Contents: Summary: Laboratory experiments on the air permeability of various screened and natural snows are described, and, results are analyzed to determine whether the parameters obtained from the measurements could be used to define a snow type. The permeability of a snow sample of known porosity (calculated from density) was determined over a wide range of air velocities; the sample was then compacted artificially a few mm, its density was determined, and its permeability measured again. The procedure was used to obtain curves for several densities of the same sample. Air flow appeared laminar for velocities less than 5 cm/sec in fine-grained snow (less than 0.8 mm in diam.), 2 cm/sec in medium-grained snow (0.8-1.2 mm diam.), and 1 cm/sec in larger-grained snow. A formula is presented expressing all of the results obtained under laminar-flow conditions in a single relationship, and an equation for estimating grain size from initial permeability and initial porosity is suggested. Snow conversion tables and a discussion of the effect of varying sample porosity on its permeability are appended.
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    Pages: iv, 19, A2, B6 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 37
    Language: English
    Note: CONTENTS Page Preface Summary Introduction Apparatus and method Experimental results and discussion Historical background Range of Darcy's law Effect of porosity on the permeability of snow Bader's equation Conclusion References Appendix I. Snow conversion table: Density to absolute porosity Appendix II. Effect on permeability of varying porosity in the sample Porosity varies with length Porosity varies with cross section
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  • 49
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-41
    In: Research report / Cold Regions Research and Engineering Laboratory, 41
    Description / Table of Contents: Summary: Laboratory experiments on the creep of sifted snow under uniaxial, hydrostatic, and confined-side compressive stresses are described, and the results are discussed on the basis of an additive theory for combined stresses. Stress (4-40 psi) and temperature (-3.6°C to -13.6°C) dependence was investigated for 35 samples (initial density = 0.4 g/cm^3) subjected to uniaxial and hydrostatic stress for 200-sec time increments. Another series of 104 samples (initial densities 0.36-0.63) was subjected to uniaxial, hydrostatic, and confined-side compressive stresses until an arbitrary change in density was reached. In all cases the applied stress ultimately became a shear stress acting between grains, the open structure reacting differently to combined stresses and separate uniaxial stresses. An activation energy of 13,400 cal/mol was obtained from the first group of tests.
    Type of Medium: Series available for loan
    Pages: iv, 12 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 41
    Language: English
    Note: CONTENTS Preface Summary Introduction Experimental General Apparatus Procedure Theoretical relations Additive theory Relationship between tests run for constant change in density and tests for constant time Results and discussion Group I experiments Group II experiments Stress dependence for group II tests Variability Time dependence Activation energy Relations between creep rates under different stress conditions Density dependence Lateral stress for confined-side tests Conclusions References
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  • 50
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-39
    In: Research report / Cold Regions Research and Engineering Laboratory, 39
    Description / Table of Contents: Summary: An analysis of snow-cover density, temperature, and hardness data, measured over a period of several years at five stations in Alaska and six stations in the Canadian Arctic, shows the snow cover in the Canadian Archipelago to be colder, denser, and harder than in the interior of Alaska. A series of nomographs were developed to estimate average monthly snow-cover density from mean monthly air temperature and wind velocity. The nomographs are applicable for the months November through March, for the Alaskan and Canadian area north of 62°N latitude, and for elevations below 1500 ft. A comparison of observed snow-cover densities with those derived from the nomographs indicates that the method will provide a reliable regional estimate of snow-cover density. Studies of the relation between snow-cover temperature and air temperature from November through March disclosed the snow to be on the average from 4°C to 9°C warmer than the air at the Alaskan stations and 4.5°C warmer at the Canadian Archipelago stations. An investigation of snow-cover hardness revealed regional variations similar to that for density. Measured snow hardness during the period of no melting was found to be related to densities between 0.15 and 0.36 g/cm^3.
    Type of Medium: Series available for loan
    Pages: iv, 9 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 39
    Language: English
    Note: CONTENTS Preface Summary Introduction Climatic parameters which may affect arctic snow-cover density Results of study Regional variations in snow-cover density Prediction of average monthly snow-cover density in the arctic from air temperature and wind velocity Comparison of observed snow-cover density with density computed from the nomographs Relation between snow-cover temperature and air temperature Relation between hardness and density of the snow cover References
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  • 51
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-42
    In: Research report / Cold Regions Research and Engineering Laboratory, 42
    Description / Table of Contents: Summary: The results of petrofabric studies in the laboratory on five samples of high-density snow collected in 1954 and 1955 at depths of 8.0, 15.5, 23.0, 34.2, and 46.3 m in a pit at Site 2 are reported. The porosity of the samples, the number of grains/cm^2, the mean number of adjacent grains per grain, the mean grain cross section, the size distribution of grain cross sections, and the orientation of c-axes were determined from enlarged photomicrographs of thin sections, using reflected light and transmitted polarized light. The number of adjacent grains per grain, the ratio of free to occupied grain surface, and the sphericity clearly depended on porosity and on each other. There was no strong relation between these data and the number of grains/cm^2. Hence, the structure of high density snow can be satisfactorily described by the porosity and the number of grains/cm^2 . Conclusions from a two-dimensional thin section can be applied to a spatial sample only if the sample is isotropic by strata.
    Type of Medium: Series available for loan
    Pages: iv, 24 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 42
    Language: English
    Note: CONTENTS Page Preface Summary Introduction Methods of preparation Measurements of structural properties Measurements on homogeneity and isotropy Results Structure data Orientation of c-axes Analysis of the distribution of the orientation of c-axes Preferred directions of the fabric Distribution of grain cross sections Size and shape of the counting areas Interrelations of the structure, data Conclusions Recommendations for further studies References
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  • 52
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-43
    In: Research report / Cold Regions Research and Engineering Laboratory, 43
    Description / Table of Contents: Summary: Charts of mean annual air temperature and precipitation over the ice cap are constructed on the basis of snow-profile studies at 8 locations, data collected for several years after 1953 at two U.S. Air Force weather stations, and records from expeditions since 1930. The warming trend in the Arctic appears to have occurred to a lesser degree on the ice cap, possibly because of the effect of the snow cover. The lowest mean annual temperature in South Greenland is estimated to occur within the area bounded by the 2500 m contour and the -18°C isotherm; mean annual temperature at 2700 is estimated as -20.9°C. In North Greenland, the mean annual temperature at 1700 m is estimated at -22°C. The presence of ice glands in the snow and daily max summer temperatures, estimated from records of coastal stations, indicate a potentially high incidence of melting at about 1300 m elevation and some melting at 1700 m in North Greenland, and melting up to 2700 m in the South. Annual accumulation is 2-3 times as great at 2500 m on the west side of the ice cap as at the crest. South of 66°N, precipitation may be about twice as great on the east side of the crest as in the west.
    Type of Medium: Series available for loan
    Pages: iv, 9 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 43
    Language: English
    Note: CONTENTS Preface Summary Introduction Derivation of mean annual air temperature data Annual accumulation References
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  • 53
    Monograph available for loan
    Monograph available for loan
    Cambridge : British Antarctic Survey
    Call number: AWI Bio-21-94362
    Type of Medium: Monograph available for loan
    Pages: 214 Seiten , Illustrationen , 30 cm
    Edition: 1st published
    ISBN: 0856651400
    Language: English
    Note: TABLE OF CONTENTS ECOLOGY 1 Sea ice: its formation, distribution and properties 2 Ice-associated ecosystems 3 Ice diatoms 4 Techniques for sampling sea-ice algae 5 The Antarctic planktonic ecosystem 6 Some aspects of the large-scale physical oceanography of the Arctic Ocean influencing biological oceanography 7 Arctic planktonic ecosystems 8 Arctic plankton diatoms: dominant species, biogeography 9 The paleontological significance of fossil diatoms from the high-latitude oceans TAXONOMY 10 Key to diatom families and glossary 11 Family Thalassiosiraceae Section 1: the genera Skeletonema, Pororsira, Bacterosira, and Detonula and the genus Thalassiosira from the Arctic Section 2: the genus Thalassiosira from the Antarctic 12 Family Leptocylindraceae: the genus Corethron 13 Family Coscinodiscaceae: the genus Stellarima 14 Family Hemidiscaceae: the genera Actinocyclus and Azpeitia 15 Family Rhizosoleniaceae: the genera Rhizosolenia and Proboscia 16 Family Biddulphiaceae: the genus Eucampia 17 Family Diatomaceae: the genera Thalassiothrix and Trichotoxon 18 Family Naviculaceae: Arctic species of the genera Diploneis, Gyrosigma, Haslea, Navicula, Pinnularia, Pleurosigma, Stauroneis and Stenoneis 19 Family Naviculaceae: the genera Plagiotropis, Manguinea, Membraneis, and Banquisia 20 Family Naviculaceae: the genus Pseudogomphonema 21 Family Auriculaceae and Bacillariaceae: the genera Auricula, Hantzschia, and Nitzschia 22 Family Bacillariaceae: the genus Nitzschia section Pseudonitzschia 23 Family Bacillariaceae: the genus Nitzschia section Nitzschiella 24 Family Bacillariaceae: the genus Nitzschia section Fragilariopsis BIBLlOGRAPHY
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  • 54
    Call number: AWI G4-22-94986
    Description / Table of Contents: Hydrological processes occurring within the vadose zone, especially in heterogeneous soils and tills typical of the Canadian shield, are not well understood. This research investigates the importance of the vadose zone in a small headwater basin (Harp 4-21) in the Canadian shield with respect to the generation of stream runoff quantity and quality during episodic rainfall and snowmelt events. The study focused specifically on: firstly the effect of variable antecedent moisture conditions on water-table and stream response, secondly, the significance of the stored vadose water in water extracted from a rising water-table, and thirdly the significance of preferential flowpathways in the vadose zone as a means of rapidly rotating, stored vadose water to the stream during runoff events. The instrumentation of the Harp 4-21 basin includes three v-notch weirs along the stream, numerous piezometers and wells, several soil lysimeters, and three tensiometer nests. Much of the data used in this study was obtained from five sites located along a hillslope transect. Soil water content at each of the hillslope sites was accurately determined using time domain reflectometry (TDR), whereas water table elevations were measured using both electronic water level tapes and calibrated rod floats. Preferential flowpath data was derived from flow gauging and chemical analyses of water samples. Results obtained from the near-stream and lower slope reaches of the hillslope transect indicated that soil water content in the vadose zone is maintained at a high level of saturation by shallow water-table depths. Further analysis of simultaneously measured soil water content and depth to water—table data clearly showed that the existence of a thick essentially saturated zone overlying the water table (capillary fringe) was responsible for the large and rapid water-table responses observed during many of the nine studied precipitation events. On a basin scale, the seasonal variability of the area in which the capillary fringe extended to the ground surface was largely responsible for the observed trend in basin yield (runoff volume/ rainfall volume) for the nine runoff events. Chemical tracing results using silica, pH and DOC showed that the large vadose water reservoir in the near-stream and lower slope areas was a dominant component in water extracted from a rising water-table during most precipitation events. Silica results from the near-stream vadose zone showed that only the massive groundwater recharge associated with spring snowmelt could completely replace the vadose water reservoir with shorter residence time snowmelt/rainfall water. The rapid routing of stored near-stream capillary fringe vadose water through preferential pathways (macropores, soil pipes) was a significant source of runoff to the stream during runoff events. The presence of soil pipes, along with the significant vadose water reservoir in near-stream and lower slope areas are sufficient to explain the large phreatic/vadose water component typically identified in two component flow separation models, and constitutes the basis of a physically-based conceptual runoff model for the Harp 4-21 basin.
    Type of Medium: Dissertations
    Pages: 172 Seiten , Illustrationen
    Language: English
    Note: Masterarbeit, Wilfrid Laurier University, Waterloo, 1992 , Table of Contents Abstract Acknowledgements List of Figures List of Tables Chapter 1 Introduction and Literature Review 1.1 introduction 1.2 Research objectives 1.3 Literature review 1.3.1 Overland flow 1.3.2 Overland flow from partial areas 1.3.3 Subsurface stormflow 1.3.4 The variable source area subsurface stormtlow concept 1.3.5 Groundwater and the capillary fringe effect 1.3.6 Preferential flow 1.3.6.1 Macropore flow 1.3.6.2 Unstable flow 1.4 Summary of uncertainties in the vadose zone Chapter 2 Methodology 2.1 Introduction 2.2 The Harp 4-21 basin: site description 2.2.1 Basin topography 2.2.2 Bedrock and surficial geology 2.2.3 Vegetation 2.2.4 General hydrology 2.3 Basin instrumentatio 2.3.1 Stream 2.3.2 Phreatic zone 2.3.3 Vadose zone 2.3.3.1 Soil moisture 2.3.3.2 Preferential flowpaths 2.4 Hillslope transect instrumentation 2.4.1 The hillslope transect 2.4.2 Time domain reflectometry 2.4.3 Vadose water extraction 2.5 Sampling techniques, frequency and chemical analyses 2.5.1 Precipitation 2.5.2 Stream 2.5.3 Phreatic zone 2.5.4 Vadose zone 2.5.4.1 Soil moisture measurement and analysis of the TDR trace 2.5.4.2 Vadose water sampling 2.5.5 Chemical analysis Chapter 3 Results and Discussion: Antecedent Moisture Conditions 3.1 Introduction 3.2 Runoff events ~ampled during the May 1990 - April 1991 field season 3.3 Assessment of antecedent moisture conditions in the Harp 4-21 basin 3.3.1 Seasonal basin yield 3.3.2 Seasonal depth to water-table 3.3.3 Tensiometric data 3.3.4 Soil moisture conditions in the hillslope transect (Time Domain Reflectometry) 3.3.4.1 Soil water content/depth to water-table relationship 3.3.4.2 Estimation of the capillary fringe thickness and the temporal variation of basin area in which it extends to the ground surface 3.4 Assessment of the origin of water in the vadose zone of near-stream and lower slope areas which experience significant water-table responses during runoff generating events 3.4.1 Introduction 3.4.2 Near-stream 07 piezometer nest 3.4.3 Lower slope TD4 mini-piezometer nest Chapter 4 Preferential flowpathways: Results and discussion 4.1. Discharge contributions to streamflow during runoff events 4.2. Assessment of the origin of water emmitted from the soil pipes during runoff events Chapter 5 Conclusions References Appendix I Appendix II Appendix Ill Appendix IV Appendix V , Englisch
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  • 55
    Call number: S 90.0095(246)
    In: Special paper / The Geological Society of America, 246
    Type of Medium: Series available for loan
    Pages: VII, 364 Seiten , Illustrationen, graphische Darstellungen, Karten , 28 cm
    ISBN: 0-8137-2246-2
    Series Statement: Special paper / The Geological Society of America 246
    Language: English
    Note: Preface Introduction Magmatic and hydrothermal processes in ore-bearing systems Judith L. Hannah and Holly J. Stein Theoretical and Experimental Studies Theoretical contraints on the chemistry of the magmatic aqueous phase Philip A. Candela Partitioning of F and Cl between magmatic hydrothermal fluids and highly evolved granitic magma James D. Webster and John R. Holloway Internal differentiation of rare-element pegmatites; A synthesis of recent research David London Fluorine-rich Granite-Rhyolite Systems The petrogenetic and metallogenetic significance of topaz granite from the southwest England orefield D.A.C. Manning and P. I. Hill The role of fluorine in the petrogenesis of magmatic segregations in the SL Francois volcano-plutonic terrane, southeastern Missouri P. I. Nabelek and C. Russ-Nabelek Melt inclusions in the quartz phenocrysts of rhyolites from Topaz and Keg Mountains, Thomas Range, Utah Christine Payette and Robert F. Martin Rare-metal enriched peralumininous rhyolites in a continental arc, Sierra Bianca area, Trans-Pecos Texas; Chemical modification by vapor-phase crystallization Jonathan G. Price, Jeffrey N. Rubin, Christopher D. Henry, Thomas L. Pinkston, Steven W. Tweedy, and David W. Koppenaal Tin and Tungsten-bearing Granitoids Comparative petrologic evolution of the Sn and W granites of the Fairbanks-Circle area, interior Alaska R. J. Newberry, L. E. Bums, S. E. Swanson, and T. E. Smith Mineralogical variation as a guide to the petrogenesis of the tin granites and related skarns, Seward Peninsula, Alaska Samuel E. Swanson, Rainer J. Newberry, Gary A. Coulter, and Thomas M. Dyehouse Geochemistry of highly fractionated I- and S-type granites from the tin-tungsten province of western Tasmania W. N. Sawka, M. T. Heizler, R. W. Kistler, and B. W. Chappell Genesis and fluid evolution of the East Kemptville greisen-hosted tin mine, southwestern Nova Scotia, Canada Jean M. Richardson, Keith Bell, David H. Watkinson, and John Blenkinsop Mica chemistry as an indicator of oxygen and halogen fugacities in the CanTung and other W-related granitoids in the North American Cordillera W. T. van Middelaar and J. D. Keith The Black Pearl mine, Arizona; Wolframite veins and stockscheider pegmatite related to an albitic stock Christopher Schmitz and Donald M. Burt Tin-bearing Rhyolites, Black Range, New Mexico Genesis of the rhyolite-hosted tin occurrences in the Black Range, New Mexico, as indicated by stable isotope studies Robert O. Rye, John L. Lufkin, and Michael D. Wasserman Eruptive fountains of silicic magma and their possible effects on the tin content of fountain-fed lavas, Taylor Creek Rhyolite, New Mexico Wendell A. Duffield Origin of Taylor Creek rhyolite magma, Black Range, New Mexico, based on Nd-Sr isotope studies Cadi Reece, Joaquin Ruiz, Wendell A. Duffield, and P. Jonathan Patchett Other Pre-Tertiary Granitoid Examples Petrogenesis of the Proterozoic rapakivi granites of Finland Ilmari Haapala and O. Tapani Rämö The Topsails igneous suite, western Newfoundland; Fractionation and magma mixing in an "orogenic" A-type granite suite Joseph B. Whalen and Kenneth L. Currie Anorogenic, bimodal emplacement of anorthositic, charnockitic, and related rocks in the Adirondack Mountains, New York James McLelland and Philip Whitney Geochemistry and metallogeny of Arizona peraluminous granitoids with reference to Appalachian and European occurrences Anne L. Shaw and John M. Guilbert Index
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  • 56
    Series available for loan
    Series available for loan
    Boulder, Colo. : Geological Society of America
    Associated volumes
    Call number: S 90.0095(268)
    In: Special paper / The Geological Society of America, 268
    Type of Medium: Series available for loan
    Pages: ix, 406 Seiten , illustrationen, Karten , 28 cm
    ISBN: 0-8137-2268-3
    Series Statement: Special paper / The Geological Society of America 268
    Language: English
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  • 57
    Monograph available for loan
    Monograph available for loan
    Waterloo, Ont. : University of Waterloo
    Call number: AWI G6-23-95002
    Type of Medium: Monograph available for loan
    Pages: xx, 214 Seiten , Illustrationen
    Language: English
    Note: Masterarbeit, University of Waterloo, 1990 , TABLE OF CONTENTS Abstract Acknowledgements List of figures List of tables List of plates preamble CHAPTER 1: INTRODUCTION 1.1 PURPOSE AND SCOPE 1.2 LOCATION AND CLIMATE 1.3 GEOLOGICAL SETTING 1.3.1 Bedrock geology 1.3.2 Glacial history 1.3.2 Surficial geology 1.4 PREVIOUS RESEARCH AND PARALLEL STUDIES 1.5 SITE INVESTIGATIONS 1.5.1 Introduction 1.5.2 Water sampling methods 1.5.3 Piezometer methods 1.5.4 Measuring hydraulic conductivity 1.S.S Surface flow monitoring 1.5.6 Seepage meters 1.5.7 Coring and porewater squeezing 1.5.8 Frost table probing 1.5.9 Geological mapping 1.5.10 Weather records 1.5.11 Depth sounding 1.6 ANALYTICAL METHODS AND LABORATORY INVESTIGATIONS 1.6.1 Sample collection, filtration, and alkalinity 1.6.2 Analytical methods 1.6.3 Quality of chemical analyses 1.6.4 Grain-size distributions and organic matter contents in till 1.6.5 Core logging and porewater squeezing 1.6.6 SEM examination of mineral weathering CHAPTER 2: HYDROLOGY AND HYDROGEOLOGY synopsis 2.1 INTRODUCTION 2.2 LOCATION AND CLIMATE 2.3 FIELD AND ANALYTICAL METHODS 2.3.1 Field methods 2.3.2 Analytical methods 2.4 SETTING 2.5 HYDROLOGY 2.5.1 Surface hydrology 2.5.2 Groundwater hydrology 2.5.2.1 Thawing of the active layer 2.5.2.2 Structure and composition of the active layer till 2.5.2.3 Groundwater flow 2.6 DISCUSSION 2.7 CONCLUSIONS CHAPTER 3: A PRELIMINARY ASSESSMENT OF ISOTOPE HYDROLOGY AND GEOCHEMISTRY abstract 3.1 INTRODUCTION 3.2 STUDY AREA 3.3 ANALYTICAL METHODS 3.4 VEGETATION AND ACTIVE LAYER PROPERTIES 3.5 STABLE ISOTOPE DATA 3.6 WATER CHEMISTRY 3.7 SUMMARY CHAPTER 4: ISOTOPIC ANALYSIS OF EVAPORATION synopsis 4.1 INTRODUCTION 4.2 STUDY AREA 4.3 FIELD AND LABORATORY METHODS 4.3.1 Materials and field methods 4.3.2 Analytkal methods 4.4 THEORY 4.4.1 Theoretical development 4.4.2 Basis of this approach 4.5 PRESENTATION AND ANALYSIS OF DATA 4.6 DISCUSSION OF RESULTS 4.7 CONCLUSIONS CHAPTER 5: WATER BALANCE AND GEOCHEMICAL EVALUATIONS abstract 5.l INTRODUCTION 5.2 SETTING 5.3 ANALYTICAL METHODS 5.4 HYDROLOGY 5.5 WATER BALANCE CALCULATIONS 5.6 GEOCHEMISTRY 5.7 DISCUSSION 5.8 CONCLUSIONS CHAPTER 6: CONCLUSIONS AND RECOMMENDATIONS 6.1 SUMMARY OF CONCLUSIONS 6.2 RECOMMENDATIONS FOR FUTURE RESEARCH References LIST OF APPENDICES A. Part A: Stable isotope analyses of water samples Part B: Tritium analyses Part C: Field geochemical measurements Part D: Major ion analyses of water samples B. GROUNDWATER SAMPLING FROM PIEZOMETERS C. RELIABILITY OF Eh MEASUREMENTS D. PIEZOMETER DESIGNS/INSTALLATION PROCEDURES Part A: 1988 Part B: 1989 E. HYDRAULIC CONDUCTIVITY TESTING/DATA F. SURFACE FLOW MEASUREMENTS Part 1: Weir Part 2: Stream gauging G. SEEPAGE METER METHODS AND MEASUREMENTS H. CORING AND SQUEEZING METHODS I. CORE AND SOIL PIT DESCRIPTIONS J. LABORATORY INVESTIGATIONS TO ADDRESS WATER QUALITY Part A: Duplicates, blanks, and comparative analyses Part B: Filtration experiment Part C: Dissolved organic carbon Part D: Carbon-13 K. CHEMICAL AND ISOTOPIC ANALYSES OF POREWATERS EXTRACTED FROM CORES L. SCANNING ELECTRON MICROSCOPY OF TILL M. WATER BALANCE THEORY
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  • 58
    Call number: AWI G6-23-95004
    Type of Medium: Monograph available for loan
    Pages: vii, 100 Seiten , Illustrationen
    Language: English
    Note: Bachelorarbeit, Wilfrid Laurier University, 1993 , TABLE OF CONTENTS Chapter 1 Introduction Chapter 2 Literature Review 2.1 Introduction 2.2 Water Balance 2.3 Nutrient Inputs 2.4 Models Chapter 3 Study Site and Site Characteristics 3.1 Study Site Location 3.2 Geology 3.3 Surface Cover 3.4 Permafrost Depth 3.5 Lake Formation 3.6 Lake Characteristics 3.7 Lake Sub Basin Characteristics 3.8 Climate 3.9 Precipitation and Melt 3.10 Evaporation Chapter 4 Methods 4.1 Introduction 4.2 Physical Sampling 4.2.1 Water Level 4.2.2 Stream Discharge 4.2.3 Precipitation 4.2.4. Radiation 4.2.5 Evaporation 4.2.6 Groundwater 4.3 Chemical Sampling 4.3.1 Total Phosphorus 4.4 Biological Sampling 4.4.1 Chlorophyll a 4.5 Water Balance 4.6 Nutrient Inputs 4.7 Models 4.7.1 Predicting Total Phosphorus Concentrations 4.7.2 Chlorophyll a Chapter 5 Results 5.1 Introduction 5.2 Water Balance 5.2.1 Lake Storage 5.2.2 Stream Discharge 5.2.3 Precipitation 5.2.4 Radiation 5.2.5 Evaporation 5.2.6 Groundwater 5.3 Nutrient Inputs 5.4 Models 5.4.1 Predicting Total Phosphorus Concentrations 5.4.2 Chlorophyll a Chapter 6 Discussion 6.1 Introduction 6.2 Water Balance 6.3 Nutrient Inputs 6.4 Models Chapter 7 Further Study Appendices Appendix 1 Lake Storage Appendix 2 Discharge Data Appendix 3 Precipitation Appendix 4 Radiation Appendix 5 Evaporation Appendix 6 Nutrient Data Appendix 7 Chlorophyll a Bibliography , Englisch
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  • 59
    Monograph available for loan
    Monograph available for loan
    Anchorage, Alas. : Bureau of Land Management, Alaska State Office | Anchorage, Alas. : Alaska Natural History Association
    Call number: AWI G3-23-95156
    Type of Medium: Monograph available for loan
    Pages: 128 Seiten , Illustrationen, Karten , 27 cm
    ISBN: 0930931106 , 0-930931-10-6
    Language: English
    Note: Contents Foreword Introduction Oil - Catalyst for change The Haul Road - Highway to the Arctic Origins: The geologic setting Glaciers shape the land Glaciation and wildlife distribution Permafrost and the periglacial environment The Dalton Highway road log Glossary Selected references
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  • 60
    Dissertations
    Dissertations
    Wageningen : Landbouwuniversiteit Wageningen
    Call number: AWI G3-23-95005
    Description / Table of Contents: In this thesis processes and parameters associated with heat and mass transfer in frozen porous media both on a theoretical and empirical basis are studied. To obtain the required measurements some existing measuring methods needed to be improved. Firstly, an improved model has been developed for the measurement of thermal conductivity with use of the nonsteady-state probe method. The measurements of thermal conductivity indicate four separate effects caused by the freezing process. The second improved measuring method is the measurement of bulk electrical conductivity with use of time-domain r e flectometry. And the third improvement is the use of the dispersion theory in the description of relations between water content and bulk electrical conductivity or dielectric constant. This thesis shows that time-domain reflectometry can be used to measure the unfrozen water content and bulk electrical conductivity simultaneously under frozen conditions and that from the latter parameter solute redistribution can be monitored. From the measured heat flows a time delay in the forming of pore ice can be concluded. From the measured moisture transport (resulting in frost heave) a relation with some soil properties could be established. For some of the materials studied a minimum temperature gradient has been observed at which heave starts . From this and other results an effort was made to come to a synthesis of the rigid ice concept and the segregation potential concept. The thesis finishes with some recommandations in connection with the improvement of soil structure by freezing, frost heave and artificial ground freezing.
    Type of Medium: Dissertations
    Pages: 8, 204 Seiten , Illustrationen
    Language: English
    Note: Dissertation, Landbouwuniversiteit Wageningen, Wageningen, 1991 , 1 INTRODUCTION 1.1 Fields of interest 1.2 Macroscopic freezing test 1.3 Microscopic model 1.4 Aim of the thesis 1.5 Overview of the thesis 2 THEORY 2.0 Introduction to the chapter 2.1 Theory of different soil analyses 2.1.1 Particle size distribution 2.1.2 Specific surface area 2.1.3 Cation exchange capacity 2.1.4 Zeta potential 2.1.5 Water retention 2.1.6 Hydraulic conductivity 2.1.7 Thermal conductivity 2.2 Determination of soil water content by time-domain reflectometry 2. 2.1 Transmission line theory 2.2.2 Water content 2.2.3 Bulk electrical conductivity 2.3 Transfer of heat and mass 2.3.1 Moisture transport 2.3.2 Heat transport 2.3.3 Solute transport 3 NEW MODELS AND METHODS 3.0 Introduction to the chapter 3.1 A new model for the nonsteady-state probe method to measure thermal properties of porous media 3.1.0 Abstract 3.1.1 Introduction 3.1.2 Present approach 3.1.3 Experimental set-up 3.1.4 The perfect line source model 3.1.5 The modified Jaeger model 3.1.6 Gauss-Newton iteration 3.1.7 Calibration measurements 3.1.8 Conclusions 3.2 A new method to measure bulk electrical conductivity in soil using time-domain reflectometry 3.2.0 Abstract 3.2.1 Introduction 3.2.2 Measurement theory 3.2.3 Materials and methods 3.2.4 Results and discussion 3.2.5 Conclusions 3.3 Application of dispersion theory to time-domain reflectometry in soils 3.3.0 Abstract 3.3.1 Introduction 3.3.2 Dielectric constant as a function of water content 3.3.2.1 Soil as a two phase dielectric medium 3.3.2.2 Unfrozen soils 3.3.2.3 Frozen soils 3.3.3 Bulk electrical conductivity as a function of water content 3.3.4 Materials and methods 3.3.5 Results and discussion 3.3.5.1 Validation of the model for bulk electrical conductivity 3.3.5.2 Comparison with other models 3.3.6 Conclusions 3.3.7 Appendix 3.4 Description of the experiments to measure heat and mass transfer in freezing porous media 3.4.1 Experimental set-up 3.4.2 Used materials 3.4.3 Relations between soil physical and electrochemical properties 4 RESULTS AND DISCUSSION 4.0 Introduction to the chapter 4.1 Thermal conductivity of unsaturated frozen sands 4. 1.0 Abstract 4.1. 1 Introduction 4.1. 2 Experimental set-up 4.1. 3 Theoretical approach 4. 1.4 Properties of the used sands 4.1.5 Measured heat flows 4.1. 6 Measured thermal conductivities 4.1. 7 Discussion 4.2 Heat transfer 4.2.1 Heat capacity 4.2.2 Thermal conductivity 4.2.2.1 Influence of the temperature dependence of the pore ice versus unfrozen water content 4.2.2.2 Contribution of the apparent thermal conductivity 4.2.2.3 Segregated ice content 4.2.2.4 Presence of the freezing front close to the measuring probe 4.2.3 Latent heat of in situ freezing 4.2.4 Heat balances 4.2.5 Temperature fields 4.2.6 Dynamics of heat flows in frozen porous materials 4.3 Moisture transfer 4.3.1 Segregation potential 4.3.2 Influence of soil physical and electrochemical properties 4.4 Application of time-domain reflectometry to measure solute concentration during soil freezing 4.4.0 Abstract 4.4.1 Introduction 4.4.2 Materials and methods 4.4.3 Results and discussion 4.4.3.1 Influence of temperature 4.4.3.2 Influence of liquid water content 4.4.3.3 Redistribution of solutes 4.4.4 Conclusions 4.5 Influence of added solutes on moisture transfer 5 CONCLUSIONS AND FINAL DISCUSSION 5.1 General discussion 5.2 Recommandations in connection with frost in porous media , Zusammenfassung in niederländischer Sprache
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  • 61
    Call number: ZSP-387-7
    In: International project on paleolimnology and late cenozoic climate
    Type of Medium: Series available for loan
    Pages: 179 S. : Ill., graph. Darst.
    Language: English
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  • 62
    facet.materialart.
    Unknown
    Berlin : Technische Fachhochschule Berlin
    Call number: K 96.0195
    Language: English
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  • 63
    Call number: AWI NBM-19-92759
    Type of Medium: Non-book medium
    Pages: 1 Videokassette (VHS, 58 Min.) : farbig , 58 min
    Language: English
    Note: A message to the world .... Antarctica, the last true wilderness, must remain inviolate, free from polution and exploitation, a living laboratory for scientific research and a continent of unsurpassed beauty for the inspiration of mankind.
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  • 64
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-91/12
    In: CRREL Report, 91-12
    Description / Table of Contents: Field trials using a man-portable Geonics, Ltd., EM31 electromagnetic induction sounding instrument, with a plug-in data processing module, for the remote measurement of sea ice thickness, are discussed. The processing module was made by Flow Research Inc., to directly measure sea ice thickness and show the result in a numerical display. The EM31-processing module system was capable of estimating ice thickness within 10% of the true value for ice from about 0.7 to 3.5 m thick, the oldest undeformed ice in the study area. However, since seawater under the Arctic pack ice has a relatively uniform conductivity (2.5 + or - 0.05 S/m), a simplified method, which can be used for estimating sea ice thickness using jet an EM31 instrument, is discussed. It uses only the EM31's conductivity measurement, is easy to put into use and does not rely on theoretically derived look-up tables or phasor diagrams, which may not be accurate for the conditions of the area.
    Type of Medium: Series available for loan
    Pages: iv, 23 Seiten , Illustrationen
    Series Statement: CRREL Report 91-12
    Language: English
    Note: CONTENTS Preface Introduction EM 31 Sounding concepts Previous EMI studies Beaufort Sea field trials EM 31 Conductivity reading versus sea ice thickness General comments Literature cited Abstract
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  • 65
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-92/14
    In: CRREL Report, 92-14
    Description / Table of Contents: Large ice jams on the Salmon River have reached Salmon, Idaho, and resulted in major flood damage during 16 winters since the winter of 1936-37. Two recent ice jams, in February 1982 and January 1984, caused flooding that resulted in damages of $1 million and $1.8 million respectively. A detailed analysis of the winter air temperature records from 1936-37 through 1991-92 revealed a strong relationship between the duration and intensity of severe cold periods, the air temperature record prior to the severe cold periods, and the occurrence of ice jams reaching the city of Salmon that result in flooding. A threshold condition is identified from which the probability of icejams reaching the city can be determined from inspection of forecasted air temperatures. It was found that once an icejam reaches the city, average daily air temperatures of approximately 18 deg F are necessary to keep the jam in place. The effects of discharge on ice thickness, and therefore ice jam length, are shown to be minor and no relation could be found in this study. An ice control structure located upstream of the city of Salmon appears to be helping to alleviate ice-jam flooding.
    Type of Medium: Series available for loan
    Pages: iv, 18 Seiten , Illustrationen
    Series Statement: CRREL Report 92-14
    Language: English
    Note: CONTENTS Preface Conversion factors Introduction Data sources and analysis Air temperature records Air temperature curves Air temperature record analysis Discharge records Results Phase 1 Phase 2 Phase 3 Effects of discharge Salmon River ice control Conclusions Literature cited Abstract
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  • 66
    Monograph available for loan
    Monograph available for loan
    Joensuu : European Forest Institute
    Call number: PIK W 510-19-92836
    Type of Medium: Monograph available for loan
    Pages: 87 Seiten
    ISBN: 9529844018
    Series Statement: Working paper / European Forest Institute 2
    Language: English
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  • 67
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-93/9
    In: CRREL Report, 93-9
    Description / Table of Contents: Traction on winter surfaces was measured using three test vehicles, each designed to measure traction for a different purpose: vehicle mobility research (CRREL Instrumented Vehicle), commercial tire testing (Uniroyal- Goodrich traction tester), and airport runway safety (Saab friction tester). The traction measured with each method is comparable, but there are systematic differences due to the effects of the surface material and the test and analysis technique. This comparison serves as the fundamental basis for collaboration between the various traction testing communities and illustrates the need for well documented test procedures and data analysis as a standard for traction testing and evaluation.
    Type of Medium: Series available for loan
    Pages: iii, 21 Seiten , Illustrationen
    Series Statement: CRREL Report 93-9
    Language: English
    Note: CONTENTS Preface Introduction Traction test methods Saab friction tester Uniroyal-Goodrich traction tester CRREL Instrumented Vehicle Surfaces tested Reporting results and terminology Factors influencing traction Results Traction curves for each surface Traction coefficients Conclusion Literature cited Appendix A: Vehicle instrumentation and samples of graphic output Appendix B: Comparison of measured traction coefficients with published andpredicted values Abstract
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  • 68
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-94/5
    In: CRREL Report, 94-5
    Description / Table of Contents: A three-dimensional theory is derived to describe the temporal behavior of gravity currents of cohesionless granular media, in an attempt to model the motion of dense, flow-type snow avalanches, ice and rock slides. A mohr-Coulomb yield criterion is assumed to describe the constitutive behavior of the material, and the basal bed friction is described similarly by a Coulomb type of friction. A drag term is included in order to model the occurrence of flow regimes where boundary drag becomes non-negligible. Data from laboratory simulations are compared to a series of numerical studies based on the aforementioned theory. A nondimensional, depth and width averaged form of the theory is considered. A Lagrangian finite difference scheme is then applied to numerically model some limiting cases of the governing equations. Two different numerical models are developed, tested and compared to experimental values. The results indicate that the model can account for flow transitions by inclusion of the drag term when the initial inclination angle is large enough to affect boundary drag. Furthermore, the temporal and spatial evolution of the granulate and final runout position can be predicted to values well within the experimental error.
    Type of Medium: Series available for loan
    Pages: iv, 29 Seiten , Illustrationen
    Series Statement: CRREL Report 94-5
    Language: English
    Note: CONTENTS Preface Nomenclature Introduction Mathematical formulation Limiting cases of the governing equations Nondimensionalization scheme Numerical solutions and comparison to experiments Unconstrained Coulomb flow model with constant bed friction Unconstrained Coulomb flow with boundary drag term Conclusions and remarks Literature cited Abstract
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  • 69
    Call number: AWI G6-19-93207
    Type of Medium: Monograph available for loan
    Pages: 42 Blätter
    Language: English , German
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  • 70
    Call number: ZSP-SCAR-701
    Type of Medium: Series available for loan
    Language: English
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  • 71
    Call number: ZSP-201-90/9
    In: CRREL Report, 90-9
    Description / Table of Contents: In 1986, a mobility model was developed for predicting the traction and motion resistance of both wheeled and tracked vehicles on shallow snow, and a winter field season was dedicated to gathering mobility data for a diverse family of vehicles (including four on wheels and three tracked) to validate the model. The original version of the model, SSM 1.0, used the Mohr-Coulomb shear failure equation from soil mechanics to predict gross traction. This required input of the snow strength parameters c and ȹ. Motion resistance is predicted by calculating the amount of work done by the tire in compacting snow and only requires snow depth and density values as input snow properties. Some effort was expended in determining an easy and reliable method of obtaining snow strength established from past instrumented vehicle test results. Historically, shear annulus apparati have been used to obtain Mohr-Coulomb strength parameters. A comparison of snow strength obtained via these three methods (shear annulus, instrumented vehicle, calculated from initial density using the relationship in SSM 1.0) for individual snow covers showed no agreement. SSM 1.0 assumed that snow strength parameters for mobility prediction were a function of initial snow density; however, traction is developed in the compacted snow under the driving element, whose strength properties bore little relation to those of the initial snow. It appears that the shear strength of the compacted snow is essentially a constant for all of the vehicles and snow covers tested here. Based on this finding, a new traction algorithm was developed, resulting in the creation of a second generation model, SSM 2.0. This algorithm predicts gross traction, on the average for the vehicles tested, within 7% of the measured value. Motion resistance prediction remains unchanged in SSM 2.0. This quantity is still not predicted with a desirable level of accuracy.
    Type of Medium: Series available for loan
    Pages: v, 72 Seiten , Illustrationen
    Series Statement: CRREL Report 90-9
    Language: English
    Note: CONTENTS Preface Nomenclature Introduction Background Field experiments Test location and test sites Test vehicles Test procedures Results CIV traction and motion resistance Wheels/trackcs vehicles traction and motion resistance Shear annulus device Accuracy and limitations of data Snow conditons Analysis Determination of snow strength parameters Traction analysis Traction model predictions Resistance analysis Resistance model predictions Conclusions and recommendations Literature cited Appendix A: Shallow snow mobility model, version 1.0 Appendix B: Test vehicle data Appendix C : Selected test data Appendix D : Snow data Appendix E: Shallow snow mobility model code, version 2.0 Abstract
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  • 72
    Call number: MOP 47597 / Mitte
    Type of Medium: Monograph available for loan
    Pages: 14 [57] Seiten , 30 cm
    Language: English
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  • 73
    Monograph available for loan
    Monograph available for loan
    Boca Raton : Smoley
    Call number: PIK N 601-93-0043
    Type of Medium: Monograph available for loan
    Pages: VIII, 308 S , graph. Darst.
    ISBN: 0849387221
    Language: English
    Location: A 18 - must be ordered
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  • 74
    Monograph available for loan
    Monograph available for loan
    Oxford : Oxford University Press
    Call number: PIK B 150-20-93976
    Type of Medium: Monograph available for loan
    Pages: VIII, 470 Seiten
    Edition: Reprinted
    ISBN: 0198239378 , 9780198239376
    Series Statement: Clarendon paperbacks
    Language: English
    Location: A 18 - must be ordered
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  • 75
    Call number: AWI P5-22-95026
    Type of Medium: Monograph available for loan
    Pages: IV, 164 Seiten , Illustrationen
    ISBN: 0-920603-44-0
    Language: English
    Note: CONTENTS Introduction / Ming-ko Woo and Denis J. Gregor No Great Change: A Commentary on 50 Years of Watching Arctic Science / F. Kenneth Hare Arctic Climate in the Future / David Etkin and Tom Agnew Ice and Snow in the Arctic and Global Change / Peter Adams Snow, Sea· Ice and Climate: A Study of Scales / Ellsworth F. LeDrew and David G. Barber Past Climate Changes as Deduced from Canadian Ice Cores / Roy M. Koerner Natural and Anthropogenic Influences on the Chemical Composition of the Arctic Troposphere / Leonard A. Barrie Organic Micropollutants in Arctic Snow and Pim / Denis J. Gregor Climatic Change and the Permafrost Landscape / Antoni G. Lewkowicz Arctic Streamflow / Ming-ko Woo Ecology and Palaeocology of the Northern Treeline / Glen M. MacDonald and K. Gajewski Climate Change and its Effects on Canadian Arctic Plant Communities / Sylvia A. Edlund Environmental Change and Prehistory in Arctic Canada / Patricia D. Sutherland Concluding Remarks / George D. Hobson Glossary
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  • 76
    Call number: MR 22.94898
    In: Special publication, 2
    Type of Medium: Monograph available for loan
    Pages: xix, 432 Seiten , Illustrationen
    ISBN: 0-9418-0901-3
    Series Statement: Special publication / The Geochemical Society No. 2
    Language: English
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  • 77
    Monograph available for loan
    Monograph available for loan
    San Antonio, Tex : Geochemical Society
    Associated volumes
    Call number: MR 22.94901
    In: Special publication / The Geochemical Society, 4
    Type of Medium: Monograph available for loan
    Pages: xi, 184 Seiten , Illustrationen , 27 cm
    ISBN: 0-941809-03-X
    Series Statement: Special publication / The Geochemical Society No. 4
    Language: English
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  • 78
    Call number: O 2075/1964 II
    Type of Medium: Journal available for loan
    ISSN: 0367-6684 , 0568-5249 , 0568-5249
    Former Title: Vorg. Akademija nauk SSSR Izvestija Akademii Nauk SSSR / Serija geografičeskaja i geofizičeskaja
    Subsequent Title: Forts. Akademija nauk SSSR Izvestija Akademii Nauk SSSR / Fizika zemli
    Subsequent Title: Forts. Akademija nauk SSSR Izvestija Akademii Nauk SSSR / Fizika atmosfery i okeana
    Language: Russian , English
    Note: Teils mit Jg.-Zählung , In kyrill. Schr
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  • 79
    Monograph available for loan
    Monograph available for loan
    [New York] : Macmillan
    Call number: MR 23.95461
    Type of Medium: Monograph available for loan
    Pages: xi, 400 Seiten , Illustrationen, graphische Darstellungen, Karten
    Edition: Second edition
    ISBN: 0023493534 , 0-02-349353-4
    Language: English
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  • 80
    Call number: MR 24.95673
    In: Vol. K-2, [Hauptbd.]
    Type of Medium: Monograph available for loan
    Pages: XIII, 672 Seiten , Illustrationen, Karten
    ISBN: 0813752159
    Series Statement: Geology of Canada ...
    Language: English
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  • 81
    Call number: 21/SR 93.0335(94,3)
    In: KTB Reports
    Type of Medium: Series available for loan
    Pages: VI, 200 Seiten , Illustrationen, Karten , 30 cm
    ISBN: 3928559133
    Series Statement: KTB-Report 94,3
    Language: German , English
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  • 82
    Call number: AWI A14-18-91746
    In: NASA Reference Publication, 1233, Vol. 2
    Description / Table of Contents: A gridded surface elevation data set and a geo-referenced data base for the Seasat radar altimeter data over Greenland are described in this volume. It is intended to be a "user's guide" to accompany the data provided to data centers and other users. The grid points are on a polar stereogrphic projection with a nominal spacing of 20 km. The gridded elevations are derived from the elevation data in the geo-referenced data base by a weigthed fitting of a surface in the neighborhood of each grid point. The gridded elevations are useful for the creating of large-scale contour maps, and examining individual elevation measurements in specific geographic areas. Tape formats are described, ans a FORTRAN program for reading the data tape is listed and provided on the tape. For more details of the data processing procedures and corrections that were derived and applied to the data, see Volume 1 of this series.
    Type of Medium: Monograph available for loan
    Pages: 92 Seiten , Illustrationen, graphische Darstellungen
    Series Statement: NASA Reference Publication 1233, Vol. 2
    Language: English
    Note: Table of Contents: Preface. - 1.0 Introduction. - 2.0 Geo-referenced data base. - 3.0 Polar stereographic elevation grid. - 4.0 Goid grid. - Tables. - Appendix. - References.
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  • 83
    Monograph available for loan
    Monograph available for loan
    Madrid : Comisión Interministerial de Ciencia y Tecnología
    Call number: AWI P6-91-0403
    Type of Medium: Monograph available for loan
    Pages: 379 Seiten , Illustrationen, graphische Darstellungen, Karten , 30 cm
    ISBN: 8436919033
    Language: Spanish
    Note: SUMARIO: Presentación. - Hidrografía al borde del hielo entre las islas Elefante y las Orcadas del Sur durante el verano austral 1988- 1989 / F. G. Figueiras y F. F. Pérez. - Hidrografía de Admiralty Bay, isla King George, Antártida, al comienzo del verano austral de 1988-1989 / R. Prego, F. F. Pérez y F. G. Figueiras. - Saruracrón de oxigeno disuelto en las aguas Investigadas durante la campaña "Antártida 8611" / A. Alvarez Meneses. - Peces capturados durante la campaña "Antártida 8611" / J. Matallanas. - Edad y crecimiento de Notothenia gibberifrons (Lönnberg, 1905), en Georgia del Sur / M. T. García Santamaría y E. Balguerias. - Algunos datos sobre la distribución, abundancia y biología de Patagonotothen brevicauda guntheri (Norman, 1937) en Shag Rocks / E. Balguerias y M. E. Quintero. - Dos nuevas especies de picnogónidos antárticos / T. Munilla. - Distribución espacial del Krill (Euphasia superba; Dana, 1852), obtenida durante la campaña "Antártida 8611" / l. Sobrino. - Análisis de los porcentajes de hembras fecundadas de Krill (Euphasia superba; Dana, 1852), obtenidos durante la campaña "Antártida 8611" / I. Sobrino. - Primeros datos sobre la flora y vegetación liquénica de isla Livingston (islas Shetland del Sur, Antártida) / L. G. Sancho, L. Kappen y B. Schroeter. - lnvestigaciones ecofisiológicas en líquenes antárticos. Primeros datos sobre la actividad fotosintética de líquenes crustáceos "in situ" / L. Kappen, B Schroeter y L. G. Sancho. - Microclima y fotosíntesis neta de Usnea antarctica a partir de mediciones realizadas "in situ" en isla Livingston (islas Shetland del Sur, Antártida) / B. Schroeter, L. Kapen y L. G. Sancho. - Notas acerca de una colonia de nidificación de Cormoran carunculado del Antártico (Phalacrocorax atriceps) en Bahía Paraíso (península Antartrca) / J. Curt y A . Fernández Riestra. - Observación de cinco cisnes de cuello negro (Cygnus melanocoryphus) en la zona del Tratado Antártico / J. Curt. - Catálogo de ceráceos, pinnípedos y aves observados desde el buque oceanográfico "Las Palmas" durante las navegaciones efectuadas en la zona del Tratado Antártico y en sus destacamentos de las islas Shetland del Sur y estrecho de Bransfiel (25-I-89 a 1-III-89) / J. Curt. - Foraminíferos, biofacies e hidrodinámica sedimentaria en la Antártida / G. Mateu. - Actividad antimicrobiana de un nuevo monoterpeno del Plocamium cartilagineum de la península Antártica / J. Rovirosa, L. Sánchez, Y. Palacios, J. Darías y A. San Martín. - Aspectos taxonómicos de bacterias aisladas en la isla Livingston durante la campaña 1986-1987 / N. Bozal, J. G. Loren y J. Guinea. - Observaciones de NO2 y ozono en el interíor del Vértice Polar Antártico / M. Gil, J. Cacho, L. Acedo y M. J. Sainz de Aja. - Condiciones meteorológicas del agujero del ozono en la Antártida / J. M. Cisneros. - Altos valores de humedad relativa medidos en la estratosfera antártica / J . M. Cisneros. - Aproximación al estudio de fenómenos micrometeorológicos en la isla Decepción / J . Vira, M. Ramos y M. R. Soler. - Las campañas 1987-1988, 1988-1989 al sur del mar de Brandsfield. Resultados científicos / M. Catalán. - Las campañas geodésicas 1987- 1988, 1988-1989 en las Shetland del Sur / J. Ballesteros, M. Berrocoso, M. Catalán, F. Cruz. R. Estrada. J. M. Fernández López, A. Luján, J. Muñoz, J. Sánchez del Toro, J. C. Sastre, R. Soto y J. G. Viramonte. - Las observaciones GPS en la red antártica 1988-1989. El efecto del campo gravitatorio austral en la observación de satélites / M. Catalán y M. Berrocoso. - Origen y estructura de la isla Decepción (islas Shetland del Sur) / J. Martí, A . Baraldo y J. Rey. - Geoquímica de fluidos en la isla Decepción / A. Valentin, M. Martini y J. L. Diez Gil. - Los enclaves de las rocas volcánicas de terraza Kendall y Bahía Murature, isla Decepción, Shetland del Sur. Antártida / C. Risso, A . Aparicio y J. G. Viramonte. - Anomalías térmicas y balance de flujo disipado en la isla Decepción, Shetland del Sur / M. Ramos, R. Ortiz, J. L. Diez Gil y J. G. Viramonte. - Caracterización de algunos parámetros termodinámicos del suelo del volcán Decepción (Antártida) / M. Ramos, M. Domínguez y R. Ortiz. - Temblores volcánicos en Decepción. Origen y evolución / J. Vila, A. M. Correig, R. Ortiz y J. Batlló. - Detección de una capa de baja velocidad asociada a las últimas erupciones en Decepción / J. Vila, A. M. Correig, R. Maciá y R. Ortiz. - Interpretación preliminar de un ensayo de perfil sísmico de refracción en Port Foster (isla Decepción) / R. Ortiz, R. Boloix y E. Carreño. - Actividad sísmica en el entorno de la Base Antártica Española Juan Carlos I (islas Livingston y Decepción) / R. Ortiz, J. Vila y J. C. Sastre. - Estudio del campo magnético en Port Foster (isla Decepción) / A. García, J. G. Viramonte, J. Vila y J. M. lbáñez. - Perfiles magnéticos sobre el sistema de fracturas del sector noroeste de Decepción / J. G. Viramonte, M Ramos, A. García, C. Suazo y J. L. Díez Gil. - Anomalías magnéticas al sur del mar de Bransfield / J. Acosta, M. Catalán, J. L. Diez, J. M Fernández López, A. García, P. Herranz, R. Ortiz y J. C. Sastre. - Tectónica reciente en los depósitos submarinos de la bahía de Depción / J. Rey, J. R. de Andrés, J. M. Fernández López y C. Palomo. - Nuevos datos de sísmica continua por reflexión sobre la evolución geodinámica reciente del margen de las Shetland del Sur y estrecho de Bransfield / J. L. Sanz, J. Acosta y P. Herranz. - Perfiles sísmicos en las Shetland del Sur y estrecho de Bransfiel. Estructura y dinámica reciente / J. Acosta, M. Catalán, P. Herranz y J. L. Sanz. - Análisis estructural del hielo del glaciar Cazadora, cuantificación direccional de la anisotropia y predicción del drenaje subglaciar. Base Antártica Española Juan Carlos l. Isla Livingston (Shetland del Sur) / A. Erase, l. Antigüedad y M. Taylor. - Distribución vertical de isótopos estables (Deuterio y Oxígeno-18) en el hielo del glaciar Cazadora junto a la Base Antártica Española Juan Carlos l. Isla Livingston (Shetland del Sur) / A. Eraso, l. Antigüedad, R. Gonfiantini, L. Araguas, M Gómez Martos y J. A. López Geta. - Distribución vertical de algunos oligoelementos presentes en el glaciar Cazadora junto a la Base Antártica Española Juan Carlos l. Isla Livingston (Shetland del Sur) / A. Eraso, l. Antigüedad. A. llarri, J. A. López Geta y M. Gómez Martos. - Análisis mineralógico y por microsonda de las cenizas volcánicas existentes junto a la Base Antártica Española Juan Carlos l. Isla Livingston (Shetland del Sur) / A. Eraso, l. Antigüedad, P. Herrero, J. Arostegui. L Eguiluz, C. Quesada y A. Sánchez. - Diferentes tipologías de aguas encontradas en la proximidad de la Base Antártica Española Juan Carlos l. Isla Livingston (Shetland del Sur) / l. Antigüedad, A. Eraso y R. Fernández Rubio. - Correlación entre caudales drenados y parámetros hidroquimicos en el río de la Base Antártica Española Juan Carlos l. Isla Livingston (Shetland del Sur) / l. Antigüedad, A. Eraso y R. Fernández Rubio. - Caracteríscicas del hidrograma en función de los datos meteorológicos y elaboración de la curva de gastos del río de la Base Antártica Española Juan Carlos l. Isla Livingston (Shetland del Sur) / l. Antigüedad. A. Eraso, A. Mangín y R. Fernández Rubió. - Anteproyecto de construcción de un azud en la albufera fósil del sexto nivel de playa existente junto a la Base Antá rtica Española Juan Carlos l. Isla livingston (Shetland del Sur) / A. Eraso, A. Sánchez de Toro, R. Fernández Rubio y J. Presa. - Instrumentación Antártica, unidad automática de adquisición de datos para aplicación general. / R. Ortiz y E. Giménez. - Instrumentación Antártica. Red Sísmica Digital / R. Ortiz y J. Vila. - Experiencias térmicas realizadas sobre el comportamiento térmico del acero en condiciones polares (Polo Norte Geográfico) / J. Aguirre, M Ramos, P. D. Sanz y A. Sigot. - Estudio de fa resistencia térmica del traje polar prototipo "CM" e , Sprache der Zusammenfassung: Englisch
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  • 84
  • 85
    Monograph available for loan
    Monograph available for loan
    Copenhagen : [s.n.]
    Call number: AWI G7-19-91942
    Type of Medium: Monograph available for loan
    Pages: 140 Seiten , Illustrationen
    Language: English
    Note: CONTENTS: Report on the 1999 activities of NGRIP Operations. - Objective. - Kangerlussuaq (Søndre Strømfjord). - Preparation of the field season. - Start of the field season. - Starting the camp. - Drilling. - Additional Kangerlussuaq equipment. - Luminescence sampling. - Summary. - Acknowledgement. - Summary of drilling experience. - NGRIP penetration rate. - 1999 Field Season, Diary. - Communication. - Schedule for camp close down. - Maintenance/Logistics after the season. - Bulk Supplies. - List of participants. - NGRIP camp load. - Table of LC130 flights. - NGRIP 1999 sub programs. - Kansas Radar. - NGRIP Paleothermometry Experiement. - Automatic weather stations. - Atmospheric dust program. - GLATIS, seismic program. - Test of Italian radar. - AWl Polar 2 radar/magnetic flights. - Sitreps. - Daily reports from NGRIP. - Surface topography near NGRIP. - Surface topography around the NGRIP site, July 1998. - Map of trenches, not updated. - Tower and roof opening of original trench. - Inclined drill pit, 1996. - Map of Greenland. - ERS1 based Topography of North Greenland. - Map of skiway. - Map of ice divide north of Summit. - Map of magnetic declination in Greenland. - Borehole inclination and inclinometer offset. - List of NGRIP addresses.
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  • 86
    Series available for loan
    Series available for loan
    Bremerhaven : Alfred-Wegener-Institut für Polar- und Meeresforschung
    Associated volumes
    Call number: ZSP-994(1992/1993) ; ZSP-994(1992/1993, eng)
    In: Zweijahresbericht / Stiftung Alfred-Wegener-Institut für Polar- und Meeresforschung, 1992/1993
    Type of Medium: Series available for loan
    Pages: 196 Seiten , Illustrationen
    ISSN: 0940-4546 , 1618-3703
    Series Statement: Zweijahresbericht / Stiftung Alfred-Wegener-Institut für Polar- und Meeresforschung 1992/1993
    Language: German , English
    Note: Inhaltsverzeichnis 1. Einleitende Übersicht 2. Nationale und internationale Zusammenarbeit 3. Forschungsarbeiten - Expeditionen 3.1 Antarktisexpedition X/2-8 3.2 Arktisexpedition IX 3.3 Antarktisexpedition Xl 3.4 Landexpedition Sibirien 4. Wissenschaftliche Arbeiten der Sektionen 4.1 Biologie I (Zoologie) 4.2 Biologie II (Botanik und Mikrobiologie) 4.3 Chemie 4.4 Geologie 4.5 Geophysik 4.6 Physik des Ozeans und der Atmosphäre I 4.7 Physik des Ozeans und der Atmosphäre II 4.8 Meeresphysik und Meßwesen 4.9 Forschungsstelle Potsdam 5. Ausgewählte Forschungsthemen Die Entwicklung von Kaltwasser-Makroalgen Die Biodiversität des antarktischen Benthos Weddellrobben - Tieftaucher in der Hochantarktis Die weltweit verbreitete Planktonalge Phaeocystis: Untersuchungen zu physiologischen und molekularen Unterschieden Die Entwicklung von Algen- und Bakteriengemeinschaften im Meereis Zooplanktonkot in der Arktis: Nahrungsgrundlage im Pelagial oder Transportvehikel bei der Sedimentation? Stimuliert ein globaler Anstieg des Kohlendioxids die marine Primärproduktion? Die Beziehung zwischen Huminstoffen und Aminosäuren in polaren Gewässern Die Ozonverteilung in der Atmosphäre über dem Atlantik Pinatubo-Aerosole und polare stratosphärische Wolken Spurengas-Messungen in der arktischen Stratosphäre während der Polarnacht Die mittleren vertikalen Ozonverteilungen über Arktis und Antarktis Eisbewegung und Subglazialtopographie im Umfeld der Schirmacheroase, Ostantarktis Umweltgeschichte der kontinentalen Ostantarktis - aufgezeichnet in Seesedimenten Das antarktische Meereis und seine Verbreitung in geologischer Vorzeit-Rekonstruktion und Modellierung Kalt- und Warmzeiten im Südatlantik anhand benthischer Foraminiferen Terrigener Sedimenteintrag im östlichen Arktischen Ozean Mineralbildung in Sedimenten und Böden der Permafrostzone Seismische Untersuchungen im eurasischen Becken (Arktischer Ozean) Untersuchungen zum Massenhaushalt des Inlandeises in Nordostgrönland Wassermassenbildung im Storfjord - ein Modell arktischer Schelfgebiete Atmosphärische Rollenkonvektion in der Framstraße ERS-l Radaraufnahmen des antarktischen Meereises Der Einfluß von Algen auf die physikalischen Prozesse im Meereis: ein Modell Die Bestimmung der Zirkulation im Weltmeer aus hydrographischen Daten Auswirkungen der Tiefenwasserproduktion auf die Zirkulation des Nordatlantik Infrarot-Zeilenkamera zur verbesserten Meereisfernerkundung LlDAR-Gerät zur Beobachtung fluoreszierender Stoffe im Meer Untersuchung der durch das Ozonloch verursachten UV-B Belastung auf Produktion und Artenzusammensetzung des Phytoplanktons 6. Logistik 7. Zentrale Einrichtungen 7.1 Öffentlichkeitsarbeit 7.2 Bibliothek 7.3 Rechenzentrum 8. Personeller Ausbau und Haushaltsentwicklung 8.1 Personal 8.2 Haushalt Anhang I Personal II Wissenschaftliche Veranstaltungen III Publikationen des Instituts IV Veröffentlichungen der Mitarbeiter V Abgeschlossene Examensarbeiten VI "Polarstern"-Expeditionen , Contents 1. Introductory Overview 2. International and National Cooperation 3. Research Projects - Expeditions 3.1 ANT X/2-8 3.2 ARK IX 3.3 ANT XI 3.4 Land Expedition to Siberia 4. Scienlific Work of the Sections 4.1 Biology I (Zoology, Ecophysiology and Macroalgae Ecology) 4.2 Biology II (Botany and Microbiology) 4.3 Chemistry 4.4. Geology 4.5 Geophysics and Glaciology 4.6 Physics of the Ocean and Atmosphere I 4.7 Physics of the Ocean and Atmosphere II 4.8 Marine Physics and Instrumentation 4.9 Potsdam Research Unit 5. Selected Research Topics The Evolution of cold-water macroalgae Antarctic Benthos Biodiversity Weddell Seals - deep divers in the High Antarctic The Cosmopolitan Planktonic Alga Phaeocystis: investigations into physiological and molecular differences Development of algal and bacterial communities in sea ice Zooplankton Faeces in Arctic Waters: Food for the Pelagic System or Transport Vehicle for Sedimenting Matter? Does the Global C02 Increase Stimulate Marine Primary Production? Relationship between Humic Substances and Amino Acids in Polar Waters The Ozone Distribution in the Atmosphere over the Atlantic Ocean Pinatubo Aerosols and Polar Stratospheric Clouds.. Measurement of Trace Gases in the Arctic Stratosphere during the Polar Night The Mean Vertical Distributions of Ozone above the Arctic and Antarctic Ice Movement and Sub-glacial Topography in the Vicinity of the Schirmacher Oasis, East Antarctic The Environmental History of the Continental East Antarctic as Recorded in Lake Sediments The Antarctic Sea Ice and its Extent in Geologically Prehistoric Times - Reconstruction and Modelling Benthic Foraminifera- Indicators of Glacial and Interglacial Climate in the South Atlantic Ocean Terrigenous Sediment Supply to the Eastern Arctic Ocean Mineral Formation in the Sediments and Soils of the Permafrost Zone Seismic Investigations in the Eurasian Basin (Arctic Ocean) Investigations into the Mass Balance of the Inland Ice in Northeast Greenland Water Mass Formation in the Storfjord - a Model of Arctic Shelf Regions Atmospheric Roll-Convection in the Fram Strait ERS-1 Radar Images of the Antarctic Sea Ice The Influence of Algae on the Physical Processes in Sea Ice: a Model Estimation of the Global Ocean Circulation from Hydrographic Measurements Influence of Deep Water Production on the North Atlantic General Circulation Infrared Line Scanner for Improved Remote Sensing of Sea Ice The LIDAR Instrument for Observation of Fluorescent Matter in the Ocean lnvestigation of the UV-B Impact on Phytoplankton Production and Species Composition 6. Logistics 6.1 Polar Stations 6.2 Research Vessels "Polarsten" and "Victor Hensen" 6.3 Polar Aircraft and Helicopters 6.4 General Logistics 7. Central Services 7.1 Press and Public Relations 7.2 Library 7.3 Computer Centre 8. Personnel Expansion and Budget Development 8.1 Personnel 8.2 Budget Annex I. Personnel II. Scientific Events Ill. Publications of the Institute IV. Publications by Members of Staff V. Completed Theses and Dissertations VI. "Polarstern" Expeditions
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  • 87
    Monograph available for loan
    Monograph available for loan
    Joensuu : European Forest Institute
    Call number: PIK W 510-19-92838
    Type of Medium: Monograph available for loan
    Pages: VII, 68 Seiten , Diagramme
    ISBN: 9529844034
    Series Statement: Working paper / European Forest Institute 4
    Language: English
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  • 88
    Call number: PIK W 510-19-92835
    Type of Medium: Monograph available for loan
    Pages: 31 Seiten
    ISBN: 952984400X
    Series Statement: Working paper / European Forest Institute 1
    Language: English
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  • 89
    Call number: MOP 47926 / Mitte
    Type of Medium: Monograph available for loan
    Pages: XXIX, 927, 92 Seiten , Illustrationen
    Language: English
    Location: MOP - must be ordered
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  • 90
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-59
    In: Research report / Cold Regions Research and Engineering Laboratory, 59
    Description / Table of Contents: Summary: The deflection expression of an infinite plate subjected to a concentrated force is used with the "method of images" to obtain solutions for 6 plates with simply supported edges. The semi-infinite plate, the wedge-shaped plate, and its special case, the rectangular corner plate, are solved in closed form; and the infinite strip, the semi-infinite strip, and the rectangular plate are solved as rapidly convergent series. Behavior under a concentrated force is studied in more detail for the semi-infinite plate and the rectangular corner plate. Relationships for obtaining bending moments, shear forces and reaction distributions as well as derivatives of the kei-function with respect to ? and ? are given in the appendices.
    Type of Medium: Series available for loan
    Pages: iv, 12, [2] Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 59
    Language: English
    Note: CONTENTS Preface Introduction and statement of the problem Solution of the boundary value problems for simply supported boundaries Semi-infinite plate Wedge-shaped plate Rectangular corner plate Infinite strip Semi-infinite strip Rectangular plate Remarks on the problem of arbitrary load distribution References Appendix A Appendix B
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  • 91
    Monograph available for loan
    Monograph available for loan
    Toronto, Ontario : ECW Press
    Call number: MOP 47747 / Mitte
    Type of Medium: Monograph available for loan
    Pages: 308 Seiten , Illustrationen
    ISBN: 1-55022-149-3
    Language: English
    Location: MOP - must be ordered
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  • 92
    Call number: PIK N 076-95-0371
    Type of Medium: Monograph available for loan
    Pages: XVII, 206 S , graph. Darst , 23 cm
    Edition: Reprinted
    ISBN: 089118113X
    Series Statement: ASA special publication 55
    Language: English
    Location: A 18 - must be ordered
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  • 93
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-20
    In: Research report / Cold Regions Research and Engineering Laboratory, 20
    Description / Table of Contents: Summary: Investigations on sea ice at Hopedale, Labrador, March 1956, included: small beam tests and in-place cantilever beam tests for flexural strength; ring tensile-strength tests; unconfined compression tests, with stress-strain studies to determine "Young's modulus"; and double shear tests. The results exhibit a great deal of scatter, primarily due to the inhomogeneity of sea ice. Ring tensile strength values range between 3.3 kg/cm^2 and 22.3 kg/cm2 between -2.5°C and -19.1°C. The small beam tests give flexural strength values from 0.5 to 17.3 kg/cm^2 in a similar temperature range. The in-place pull-up cantilever beam tests give flexural strength values of 2.2 to 4.0 kg/cm^2, with much less scatter. Crushing strength values range from 26.3 to more than 107 kg/cm^2 in the range -4.9°C to -18.3°C. Values for Young's modulus obtained from the slope of the straight line portion of the stress-strain curves in compression ranged between 4520 and 10,225 kg/cm^2. There is a temperature dependence, explained by the effect of change in brine content, on sea-ice structure. The double shear tests give values of 7.8 to 34.2 kg/cm^2 in the range -5.5°C to -12.8°C. These are higher than the tensile-strength values. These failures occurred normal to the direction of growth, while the tensile strength was obtained with failure parallel to it.
    Type of Medium: Series available for loan
    Pages: 15 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 20
    Language: English
    Note: CONTENTS Page Preface Summary Introduction Ring tensile strength Flexural strength of small beams Flexural strength of inplace beams Crushing strength Shear strength Discussion of results References
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  • 94
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-21
    In: Research report / Cold Regions Research and Engineering Laboratory, 21
    Description / Table of Contents: Limited studies of white-outs on the Greenland Ice Cap indicate that five major types of low visibility have been reported as white-out. They are: 1.) Overcast white-out, caused by a continuous cloud cover. 2.) Water-fog white-out, produced by supercooled water droplets in the air. 3.) Ice-fog white-out, produced by ice crystals suspended in the air. 4.) Blowing snow white-out, produced by wind-driven, wind-eroded snow. 5.) Precipitation white-out, produced by falling snow. The first three types are interrelated and appear to be produced by upslope, convective lifting of warm maritime air and the advective transport of the cooled saturated air over the cold snow field. Radiation heat losses from the snow surface may contribute to more rapid formation of the white-out. The fact that there is a shift in the prevailing wind direction prior to the development of a white-out indicates that certain changes in upper air circulation may be associated with white-out formation and duration. There is reason to believe that upper air and surface observations might make it possible to forecast white-outs on the Greenland Ice Cap with some degree of reliability.
    Type of Medium: Series available for loan
    Pages: iv, 12 Seiten , Illustrationen , 27 cm
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 21
    Language: English
    Note: CONTENTS Preface Summary Introduction Results at Site 2 Discussion References
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  • 95
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-29
    In: Research report / Cold Regions Research and Engineering Laboratory, 29
    Description / Table of Contents: Summary: A microscopic method for the determination of particle-size distributions of pulverized snow was worked out. The method gives satisfactory distribution curves, presenting the number of particles as a function of their cross-sectional "areas". The measurements were made by means of a filar micrometer eyepiece, the snow particles being placed on a ruled glass slide, which was submerged in silicone oil to prevent evaporation. The time for the determination of a distribution can be appreciably shortened by estimating the size of the particles instead of measuring them, though the accuracy is not so high in this case.
    Type of Medium: Series available for loan
    Pages: iv, 8 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 29
    Language: English
    Note: CONTENTS Preface Summary Introduction Experimental Snow samples Procedure Experimental results Fraction 150-300 µ Fraction 0-150 µ Mixture of fractions Conclusions
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  • 96
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-26
    In: Research report / Cold Regions Research and Engineering Laboratory, 26
    Description / Table of Contents: Summary: The results of temperature, density, ram-hardness and grain-size measurements at 118 test sites along a 300-mi. traverse, ranging in elevation from 2000 to 8000 ft, are reported in detail, and their meteorological and climatic implications are discussed. Four types of diagenetically produced facies were recognized: ablation facies, extending from the snout of the glacier to the firn line; soaked facies, extending from the firn line to the saturation line; percolation facies, extending from the saturation line to the dry-snow line; and dry-snow facies, extending across the glacier above the dry-snow line. The well defined saturation line shows marked discontinuities in temperature, density, and ram hardness, while the dry-snow line is a transition 1 zone 10-20 mi. wide. The recognition of facies allows greater resolution of glacier characteristics than Ahlmann's classification, permitting quantitative subdivision of all types of large glaciers. Regional precipitation (entirely from cyclonic storms) is about 5 times greater than at Thule; and the prevailing katabatic winds control the vertical component of the temperature gradient in the snow and firn. The depth density curve of the firn at elevations where melt is negligible is invariant with time, as in Sorge's law, so that the densification can be treated as a steady-state situation with load as the only significant variable.
    Type of Medium: Series available for loan
    Pages: vii, 62, A4, B2, C2 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 26
    Language: English
    Note: CONTENTS Preface Summary Chapter I. Introduction Greenland Glaciers and stratigraphy The Greenland ice sheet - a rock formation Region of investigation Chapter II. Methods of investigation Stratigraphy Accumulation measurements Work program at pit stations General description of pits Temperature Hardness Density, stratigraphy, and grain size Accuracy of density measurements Photography Core drilling Air permeability and mechanical tests Elevation measurements Barometric altimetry Transit leveling Chapter III. Basic concepts and definitions Summer melt Soaking Complete soaking Localized percolation Stability Diagenetic facies Chapter IV. Presentation and discussion of results Grain size and morphology Grain size Morphology Temperature Seasonal variation and mean annual temperature Thermal effect of an open pit Constancy of climate Facies in terms of temperature data Hardness Continuity of strata Effect of wind Increase in R with depth below snow surface Facies in terms of hardness data Density Depth vs density data Depth vs load data Attempts to formulate depth vs density Facies in terms of density data Glacier facies - a classification of glaciers Chapter V. Stratigraphy and accumulation Stratigraphy Stratigraphic interpretation at station 1-0 Correlation between stratigraphic and meteorological records Accumulation Integrated qepth-density curves Measurement of accumulation on surface marker plates Pole-marker measurements Stratigraphic correlation Selection of a reference datum in the annual stratigraphic sequence Correlation across the traverse Effects of topography Chapter VI. Meteorological and climatological implications Winds Precipitation Annual heat exchange References Appendix A: Stratigraphy, meteorology and glaciology Appendix B: Logistics and development of the research program Appendix C: Tables
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  • 97
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-27
    In: Research report / Cold Regions Research and Engineering Laboratory, 27
    Description / Table of Contents: Summary: The results of a study on the feasibility of mapping selected snow-cover characteristics for military purposes, taking into account both current synoptic and average conditions, are reported in detail. Problems associated with the construction of isolines for depicting individual or combination of snow-cover conditions are discussed; the need for other statistical parameters in addition to the means is stressed; and the adaptation of frequency and variability indices is suggested. The use of a regional technique, which identified areas somewhat homogenous or substantially different from adjacent areas, is investigated. Problems in mapping snow density are also considered as well as the possibility of estimating snow density from meteorological data. Three sets of codes for the systematic recording and transmission of data are proposed, including a code for ground observers, a simplified code for use where no instruments or trained personnel are available, and a code for aerial observations.
    Type of Medium: Series available for loan
    Pages: vi, 92 Seiten , Illustrationen , 27 cm
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 27
    Language: English
    Note: TABLE OF CONTENTS PREFACE LIST OF TABLES LIST OF ILLUSTRATIONS INTRODUCTION Chapter I. APPLICATION OF ISOLINES FOR DEPICTING ASPECTS OF THE SNOW COVER Visual Problems Use of a simplified base map Other solutions Substantive Problems Observational errors Sampling errors Bias error Effect of reliability of data on isolines Conclusion The ''reasoned distribution'' Effects of substantive problems Conclusion II. DEVELOPMENT OF OTHER MEASURES, INDICES, AND METHODS FOR DEPICTING SNOW COVER CONDITIONS Examples of Possible Normal Indices of Snow Cover Average snow depth at end of the maximum month Average monthly snow depths by superimposed or located line graphs Time aspects Snowfall Selected Statistical Parameters of a Particular Value Extreme values Frequency values Measures of variability Conclusion III. SNOW REGIONS: AN APPROACH TO MAPPING SNOW COVER Snow Region Concept Descriptions of Snow Regions 1. Pacific Coast and Coastal Valley Region 2. The Mountain Zone 3. Great Plains Region 4. The Mackenzie-Manitoba Region 5. Upper Ontario Region 6. Northern Great Lakes-St. Lawrence Region 7. Labrador Region 8. The Northern Arctic Region 9. Ungava-Baffinland Region Conclusions IV. CURRENT SNOW DATA MAPS Introduction Ground Observer's Code Suggested code for "Ground Observer's Snow Report" Comments Symbols for a comprehensive station model Air Observation Code Comments Station Model for Aircraft Snow Observations A Simplified Snow Observation Report . Introduction Proposed code and symbols for station model based on Simplified Snow Observation Report Conclusion Chapter V. MAPPING SNOW DENSITY Introduction Limitations of Data for Mapping Available data Reliability of the data Natural variations in density Snow Density Maps of Eastern Canada Statistical Investigation of Density: Eastern Canada Test for area differences Estimating regional trends in density: Orthogonal polynomials Regional density changes during the winter Conclusions: Statistical investigations Estimating Snow Density from Meteorological Data Relation of density to wind speed and temperature Application of Dmitrieva's equation Conclusion VI. CONCLUSION Snow Cover Maps: Small Scale Compilations of Various Aspects of Their Parameters Preparation of Synoptic Current Snow Data Maps Snow Density Research Investigation of Drift and Erosional Surfaces Initiation of Systematic Collection and Recording of Snow Data Internationally Research Reports Based on Existing Literature .
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  • 98
    Monograph available for loan
    Monograph available for loan
    Hong Kong : Royal Observatory
    Call number: MOP 47270(1990) / Mitte
    Type of Medium: Monograph available for loan
    Language: English
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 99
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-32
    In: Research report / Cold Regions Research and Engineering Laboratory, 32
    Description / Table of Contents: Summary: Apparatus was built for deforming ice crystals under hydrostatic pressures up to 350 atmospheres. Single crystals were placed in the mounts in such a way that the deformation occurred by gliding on the basal glide plane. It was found that the shear strain rate increased as the pressure was increased at constant temperature, but that the rate is practically independent of hydrostatic pressure when the difference between the ice temperature and the melting point is kept constant.
    Type of Medium: Series available for loan
    Pages: iv, 7 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 32
    Language: English
    Note: CONTENTS Preface Summary Introduction Test apparatus and experimental procedures Experimental results Conclusions References
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  • 100
    Series available for loan
    Series available for loan
    Wilmette, Ill. : Snow Ice and Permafrost Research Establishment, Corps of Engineers, U.S. Army
    Associated volumes
    Call number: ZSP-202-33
    In: Research report / Cold Regions Research and Engineering Laboratory, 33
    Description / Table of Contents: Summary: A series of deformation measurements have been selected for preliminary studies on the plasticity of Greenland glacier ice. The measurements to be reported on were obtained in the Red Rock and TUTO tunnels in Northwest Greenland. Both tunnels were excavated during the summer of 1955 with some additional work done during the summer of 1956. Deformation measurements made up to the end of the 1956 summer season, therefore, are of limited reliability, but certain trends appearing in these data seem worth reporting. The topics discussed are (1) the shearing of an initially vertical peg system at Red Rock, (2) the deformation of core holes at TUTO, and (3) tunnel closure at both sites. These data are analyzed on the basis of laminar flow of the Nye type and certain conclusions are derived.
    Type of Medium: Series available for loan
    Pages: 6 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 33
    Language: English
    Note: CONTENTS Introduction Experimental Analysis The shear of glaciers Tunnel closure Conclusions References
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