Call number:
ZSP-201-82/4
In:
CRREL Report, 82-4
Description / Table of Contents:
Several proposed methods for treating the momentum flux between drifting sea ice and the underlying ocean are interpreted in terms of simple planetary-boundary-layer (PBL) turbulence theory. The classical two-layer approach, in which the solution for a thin surface layer is matched to an Ekman solution for the outer layer, is used to derive several forms of the drag law. These forms range from linear (where stress is proportional to relative speed), through quadratic (where stress is proportional to relative speed squared), to a Rossby-similarity law like that used to express frictional drag on geostrophic wind in the atmosphere. Only formulations which conform with Rossby-similarity scaling are consistent with free-drift data from the 1975 AIDJEX drift station experiment.
Type of Medium:
Series available for loan
Pages:
iv, 17 Seiten
,
Illustrationen
Series Statement:
CRREL Report 82-4
URL:
https://hdl.handle.net/11681/9447
Language:
English
Note:
CONTENTS
Abstract
Preface
Background
Hierarchy of drag laws and simple models
The momentum equation for the planetary boundary layer
Linear eddy viscosity - the constant stress layer
Two-layer eddy viscosity
PBL scaling
A dimensionless two-layer system
A dimensionless two-layer system with modified stress
Evaluating the drag laws
Rossby similarity parameters and buoyancy effects
Discussion
Literature cited
Location:
AWI Archive
Branch Library:
AWI Library
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