ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
Filter
  • Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory  (5)
  • Englisch  (5)
  • Französisch
  • Japanisch
  • Polnisch
  • 2020-2024
  • 1980-1984
  • 1960-1964  (5)
  • 1961  (5)
  • 1
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-202-78
    In: Research report / Cold Regions Research and Engineering Laboratory, 78
    Beschreibung / Inhaltsverzeichnis: Summary: This climatological study makes use of the temperature, wind, and precipitation records from 12 stations on the Greenland Ice Sheet. Many of these stations were not in operation for concurrent periods and records for a year or more were available from only a few of them. The mean, mean maximum, mean minimum, absolute maximum, and absolute minimum temperatures were computed from the records. The highest absolute maximum temperature reported was 44°F at Mint Julep in southwestern Greenland. The lowest absolute minimum was -94°F at Northice in northern Greenland. This study shows that the prevailing wind usually was from the direction of the high central area of the ice sheet. Stations on the west slope had prevailing winds with an easterly component whereas stations on the east slope had prevailing winds with a westerly component. The wind speed varied from 0 to approximately 60 kt, but was predominantly in the 0 to 20 kt range. At some of the stations on the ice sheet, precipitation was measured in precipitation gages, at others it was measured as surface accumulation. At many locations the annual accumulation was determined from stratigraphic studies of the snow profile. The number of days on which snow occurred, expressed as percent of total days of observation, was used as an index to the amount of snowfall. The mean annual accumulation shows precipitation to be heavier on the west slope of the ice sheet than in other areas. The precipitation records at Northice indicate that the annual precipitation in that part of northern Greenland may be very light. The means for the various climatological parameters covered in this study are presented in tables and on a climatological map which presents a cartographic picture of the overall climatology of the Greenland Ice Sheet.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 13, A5, B4 Seiten , Illustrationen
    Serie: Research report / Cold Regions Research and Engineering Laboratory 78
    Sprache: Englisch
    Anmerkung: CONTENTS Preface Summary Introduction Air temperature Wind direction and speed Precipitation and accumulation Climatological map for the Greenland Ice Sheet Appendix A: Temperature data Appendix B: Precipitation data
    Standort: AWI Archiv
    Zweigbibliothek: AWI Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 2
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-202-80
    In: Research report / Cold Regions Research and Engineering Laboratory, 80
    Beschreibung / Inhaltsverzeichnis: From the Introduction: During the last few years, there has been an increased interest in developing a rational explanation for the rather considerable variation in such bulk properties of sea ice as its strength, density, thermal conductivity, latent heat of melting, and coefficient of thermal expansion. Of these properties, sea-ice strength has received by far the most attention for practical reasons.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 30, A6, B10, C2, D5 Seiten , Illustrationen
    Serie: Research report / Cold Regions Research and Engineering Laboratory 80
    Sprache: Englisch
    Anmerkung: CONTENTS Preface Summary Introduction Experimentation Method of growing salt ice Strength test procedures Bulk properties of salt ice Phase relations Density and air content Strength results Strength of fresh-water ice Strength of NaCl ice as a function of brine volume Strength of NaCl· 2H2O ice as a function of the relative volume of solid salt Effect of thermal history on salt-ice strength Phase hysteresis Geometric hysteresis Effect of short-term cooling on the strength of fresh-water and NaCl·2H2O ice Effect of the volume of inclosed air on the strength of salt ice Conclusions NaCl ice Sea ice References Appendix A: Volume of brine and NaCl· 2H2O in NaCl ice as a function of salinity and temperature Appendix B: Ring test results Normal test sequences Appendix C: Ring test results Hysteresis test sequences Appendix .b: Ring test results Thermal history test sequences
    Standort: AWI Archiv
    Zweigbibliothek: AWI Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 3
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-202-84
    In: Research report / Cold Regions Research and Engineering Laboratory, 84
    Beschreibung / Inhaltsverzeichnis: Summary: The law of sliding of ice over bedrock is generalized to include the effect of the presence of a longitudinal stress. The sliding velocity thus depends on both the shear stress acting at the bottom of an ice mass and the longitudinal stress. With this generalized law, it is still possible to make a one-dimensional analysis of the problem of calculating the profile of an ice cap or glacier, such as was carried out by Nye, and yet introduce the effect of large longitudinal stresses. As a result a profile can be calculated with two equations. One equation is applicable to the central region of an ice cap and the other equation (which was found by Nye) is valid elsewhere. By an appropriate joining of the profiles derived from these two equations, the complete profile of an ice cap can be obtained. From two sample calculations it is shown that, for a large ice cap, Nye's theory is valid practically everywhere, and there is no real need to bring in the modification. For a small ice cap, the modification to the profile is valid over an appreciable fraction of the total width of the ice cap. A very simple extension of the analysis of the ice cap profile allows for the effect of isostatic sinking of the bedrock surface under a large ice cap. (An initially flat bedrock surface was assumed. The analysis can be extended easily to allow for an arbitrarily shaped initial bedrock surface.)
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 12 Seiten , Illustrationen
    Serie: Research report / Cold Regions Research and Engineering Laboratory 84
    Sprache: Englisch
    Anmerkung: CONTENTS Preface Summary Introduction Theory Effective sliding velocity Estimate of stresses Surface profilecalculations Effect of the weight of ice on the bedrock base Sample calculations References
    Standort: AWI Archiv
    Zweigbibliothek: AWI Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 4
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-202-85,1
    In: Research report / Cold Regions Research and Engineering Laboratory, 85,1
    In: The frost behavior of soils : laboratory and field data for a new concept, Part I
    Beschreibung / Inhaltsverzeichnis: Partial summary: Laboratory experiments have been performed with special cabinets in which soil samples, under complete saturation and without surcharges, were subjected to alternate freezing and thawing cycles. Tests included series with both freezing and thawing from the top and with freezing from the bottom and thawing from the top. The soil materials used were well-graded, sandy gravels, the finest one with 14% finer than no. 200 mesh (0. 074 mm).
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 22 Seiten , Illustrationen
    Serie: Research report / Cold Regions Research and Engineering Laboratory 85,1
    Sprache: Englisch
    Anmerkung: CONTENTS Preface Summary Introduction to the problem Laboratory data Preliminary experiments Vertical sorting and volume changes produced by cyclic freeze -thaw Volume increase by sorting in straight graded samples without freezing and thawing Field data Vertical sorting of the active layer Correlation between laboratory and field data Conclusion and recommendations References
    Standort: AWI Archiv
    Zweigbibliothek: AWI Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 5
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-202-79
    In: Research report / Cold Regions Research and Engineering Laboratory, 79
    Beschreibung / Inhaltsverzeichnis: Summary: The theory of a plate on an elastic foundation will closely predict the radial cracks observed in loading tests on floating ice sheets. However, the plate theory does not predict accurately the circumferential crack which forms ultimately with increased loading. The wedge theory is developed in an attempt to better predict the location and magnitude of the stresses causing the circumferential crack. The results obtained can be applied to help predict the ultimate bearing capacity of an ice sheet, provided the modulus of elasticity and flexural strength of the ice are known.
    Materialart: Schriftenreihen ausleihbar
    Seiten: Getrennte Zählung , Illustrationen
    Serie: Research report / Cold Regions Research and Engineering Laboratory 79
    Sprache: Englisch
    Anmerkung: CONTENTS Preface Summary Introduction Solution Applications Conclusions References Appendix A Computer program Graphs of nev functions, derivatives, and integrals Tables of nev functions, derivatives, and integrals
    Standort: AWI Archiv
    Zweigbibliothek: AWI Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...