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An Application of a Numerical Sea Ice Model to the East Greenland Area

An Application of a Numerical Sea Ice Model to the East Greenland Area
Author: Walter B. Tucker (III.)
Publisher:
Total Pages: 110
Release: 1981
Genre:
ISBN:

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A dynamic-thermodynamic sea ice model which employs a viscous-plastic constitutive law has been applied to the East Greenland area. The model is run on a 40-km spatial scale at 1/4-day time steps for a 60-day period with forcing data beginning on 1 October 1979. Results tend to verify that the model predicts reasonable thicknesses and velocities within the ice margin. Thermodynamic ice growth produces excessive ice extent, however, probably due to inadequate parameterization of oceanic heat flux. Ice velocities near the free ice edge are also not well simulated, and preliminary investigations attribute this to an improper wind field in this area. A simulation which neglects ice strength, effectively damping ice interaction with itself and allowing no resistance to deformation, produces excessive ice drift toward the coast and results in unrealistic nearshore thickness. A dynamics-only simulation produced reasonable results including a more realistic ice extent, but the need for proper thermo-dynamics is also apparent. Other simulations verify that ice import from the Artic Basin, and ice transport due to winds and currents, were also important components in the model studies. (Author).


CRREL Monograph

CRREL Monograph
Author:
Publisher:
Total Pages: 306
Release: 1981
Genre: Cold regions
ISBN:

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CRREL Benchnotes

CRREL Benchnotes
Author:
Publisher:
Total Pages: 250
Release: 1976
Genre: Cold regions
ISBN:

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The Drift of Sea Ice

The Drift of Sea Ice
Author: Matti Leppäranta
Publisher: Springer Science & Business Media
Total Pages: 370
Release: 2011-03-22
Genre: Science
ISBN: 3642046835

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The Second Edition of The Drift of Sea Ice presents the fundamental laws of sea ice drift which come from the material properties of sea ice and the basic laws of mechanics. The resulting system of equations is analysed for the general properties of sea ice drift, the free drift model and analytical models for ice drift in the presence of internal friction, and the construction of numerical ice drift models is detailed. This second edition of a much lauded work, unique on this topic in the English language, has been revised, updated and expanded with much new information and outlines recent results, in particular in relation to the climate problem, mathematical modelling and ice engineering applications. The current book presents the theory, observations, mathematical modelling techniques, and applications of sea ice drift science. The theory is presented from the beginning on a graduate student level, so that students and researchers coming from other fields such as physical oceanography, meteorology, physics, engineering, environmental sciences or geography can use the book as a source book or self-study material. First the drift ice material is presented ending with the concept of ‘ice state’ – the relevant properties in sea ice dynamics. Ice kinematics observations are widely presented with the mathematical analysis methods, and thereafter come drift ice rheology – to close the triangle material – kinematics – stress. The momentum equation of sea ice is derived in detail and its general properties are carefully analysed. Then follow two chapters on analytical models: free drift and drift in the presence of internal friction: These are very important tools in understanding the dynamical behaviour of sea ice. The last topical chapter is numerical models, which are the modern tool to solve ice dynamics problem in short term and long term problems. The closing chapter summarises sea ice dynamics applications and the need of sea ice dynamic knowledge and gives some final remarks on the future of this branch of science.


Microwave Remote Sensing of Sea Ice

Microwave Remote Sensing of Sea Ice
Author: Frank D. Carsey
Publisher: American Geophysical Union
Total Pages: 466
Release: 1992-04-08
Genre: Science
ISBN: 087590033X

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Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 68. Human activities in the polar regions have undergone incredible changes in this century. Among these changes is the revolution that satellites have brought about in obtaining information concerning polar geophysical processes. Satellites have flown for about three decades, and the polar regions have been the subject of their routine surveillance for more than half that time. Our observations of polar regions have evolved from happenstance ship sightings and isolated harbor icing records to routine global records obtained by those satellites. Thanks to such abundant data, we now know a great deal about the ice-covered seas, which constitute about 10% of the Earth's surface. This explosion of information about sea ice has fascinated scientists for some 20 years. We are now at a point of transition in sea ice studies; we are concerned less about ice itself and more about its role in the climate system. This change in emphasis has been the prime stimulus for this book.


USA CRREL Benchnotes

USA CRREL Benchnotes
Author: Cold Regions Research and Engineering Laboratory (U.S.)
Publisher:
Total Pages: 218
Release: 1983
Genre: Cold regions
ISBN:

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