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On The Profile Properties Of Undeformed First Year Sea Ice Draft Final Report

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On The Profile Properties Of Undeformed First Year Sea Ice Draft Final Report

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Author : Gordon F. N. Cox
language : en
Publisher:
Release Date : 1985

On The Profile Properties Of Undeformed First Year Sea Ice Draft Final Report written by Gordon F. N. Cox and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Sea ice categories.

Profile Properties Of Undeformed First Year Sea Ice

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Author : Gordon F. N. Cox
language : en
Publisher:
Release Date : 1988

Profile Properties Of Undeformed First Year Sea Ice written by Gordon F. N. Cox and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Ice categories.

In many sea ice engineering problems the ice sheet is assumed to be a homogeneous plate whose mechanical properties are estimated from the bulk salinity and average temperature of the ice sheet. Typically no regard has been given to the vertical variation of ice properties in the ice sheet or to time of ice formation. This paper reviews some of the mechanical properties of sea ice, including ice tensile, flexural and shear strengths, as well as the ice modulus. Equations for these properties are given as functions of the ice brine volume, which can be determined from ice salinity and temperature. A numerical, finite difference model is developed to predict salinity and temperature profiles of a growing ice sheet. In this model ice temperatures are calculated by performing an energy balance of the heat fluxes at the ice surface. The conductive heat flux obtained from the energy balance is then used to calculate the rate of ice growth and ice thickness by applying the Stefan ice growth equation. Ice salinities are determined by considering the amount of initial salt entrapment at the ice/water interface and the subsequent brine drainage due to brine expulsion and gravity drainage. Ice salinity and temperature profiles are then generated using climatological data for the Central Arctic Basin. The profiles appear to be realistic and agree reasonably well with field data. Mechanical property data is developed to provide mechanical property profiles for first-year sea ice of different thicknesses, grown at different times of the winter. The predicted profiles give composite plate properties that are significantly different from bulk properties obtained by assuming homogeneous plates. (EDC).

Proceedings Of A Synthesis Meeting

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Author :
language : en
Publisher:
Release Date : 1981

Proceedings Of A Synthesis Meeting written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Beaufort Sea categories.

Relates to U.S. Dept. of the Interior's proposed sale 71, the second major Beaufort Sea lease sale. Sale 71 area located on Alaskan arctic coast. Two sections: characterization of Sale 71 environments, and interdisciplinary process analyses, impact predictions, and issue discussions.

Spaceborne Synthetic Aperture Radar

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Author : Diane L. Evans
language : en
Publisher:
Release Date : 1995

Spaceborne Synthetic Aperture Radar written by Diane L. Evans and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Earth sciences categories.

Government Reports Annual Index

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Author :
language : en
Publisher:
Release Date : 1989

Government Reports Annual Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Government reports announcements & index categories.

Spri Review

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Author : Scott Polar Research Institute
language : en
Publisher:
Release Date : 1985

Spri Review written by Scott Polar Research Institute and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Polar regions categories.

Antarctic Sea Ice

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Author : Martin O. Jeffries
language : en
Publisher: American Geophysical Union
Release Date : 1998-02-04

Antarctic Sea Ice written by Martin O. Jeffries and has been published by American Geophysical Union this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998-02-04 with Science categories.

Published by the American Geophysical Union as part of the Antarctic Research Series, Volume 74. In a 1971 Scientific Committee on Antarctic Research report that reviewed polar contrasts in sea ice, Lyn Lewis and Willy Weeks made the following observation: "People who study sea ice in the Arctic Basin are commonly asked if they have ever studied ice in Antarctica, and they answer 'why bother, it's the same old stuff." Noting this was "fortunately true to a considerable extent," they added "It is clear that future work will depend critically on the logistics facilities available to allow surface observations beyond the fast ice edge at all seasons of the year. Of almost equal importance will be the development of instruments and recording equipment suited for use in the polar environment" (Lewis, E. L., and W. F. Weeks, Sea Ice: Some Polar Contrasts, in, Antarctic Ice and Water Masses, edited by G. Deacon, Scientific Committee on Antarctic Research, Cambridge, 23-34, 1971). Lewis and Weeks made no specific mention of Earth-orbiting satellites, on which the first passive microwave sensor became operational in December 1972. Less than a year later the giant Weddell Polynya was observed for the first time. Perhaps more than any other development, this unexpected feature illustrated the potential to greatly expand our knowledge of sea ice through the application of spaceborne remote sensing. Simultaneously, it acted as a catalyst for a significant increase in the level of research.