UID:
kobvindex_GFZ20200317150203
Format:
v, 40 Seiten
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Illustrationen
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29 cm
Series Statement:
CRREL Report 82-16
Content:
Abstract: 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 thicknesses. A dynamics-only simulation produced reasonable results, including a more realistic ice extent, but the need for proper thermodynamics is also apparent. Other simulations verify that ice import from the Arctic Basin, and ice transport due to winds and currents, were also important components in the model studies.
Note:
CONTENTS
Abstract
Preface
Introduction
Model description and application
Results and discussion
Wind and current fields
Standard simulation
Thermodynamic simulation
Zero ice strength
Zero ice import
Zero currents
Modified currents
Zero winds
Dynamics simulation
Summary and concluding remarks
Literature cite
In:
CRREL Report, 82-16
Language:
English
Keywords:
Forschungsbericht
URL:
https://hdl.handle.net/11681/9356
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