Air Mass Modification in the Marginal Ice Zone.

A case study of the Andreas et al. (1984) data on atmospheric boundary layer modification in the marginal ice zone is made. Our model is a two-dimensional, multi-level, linear model with turbulence, lateral and vertical advection, and radiation. Good agreement between observed and modeled temperatur...

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Bibliographic Details
Main Authors: Bennett,Theodore J , Jr, Hunkins,Kenneth
Other Authors: LAMONT-DOHERTY GEOLOGICAL OBSERVATORY PALISADES NY
Format: Text
Language:English
Published: 1985
Subjects:
Atmospheric Physics
Snow
Ice and Permafrost
*AIR FLOW
*BOUNDARY LAYER
*SEA ICE
STRESSES
MATHEMATICAL MODELS
LINEAR SYSTEMS
AIR
MODIFICATION
TWO DIMENSIONAL
MASS
SECONDARY
WIND
TURBULENCE
COOLING
SURFACES
CASE STUDIES
ICE
COEFFICIENTS
AIR TO SURFACE
HYPOTHESES
ACCUMULATION
DRAG
AIR WATER INTERACTIONS
HEAT FLUX
CIRCULATION
ADVECTION
ATMOSPHERES
Andreas
Ice
permafrost
Sea ice
Online Access:http://www.dtic.mil/docs/citations/ADA161745
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA161745
Description
Summary:A case study of the Andreas et al. (1984) data on atmospheric boundary layer modification in the marginal ice zone is made. Our model is a two-dimensional, multi-level, linear model with turbulence, lateral and vertical advection, and radiation. Good agreement between observed and modeled temperature cross-sections is obtained. In contrast to the hypothesis of Andreas et al., we find the air flow is stable to secondary circulations. Cloud top longwave cooling, not an air-to-surface heat flux, dominates the cooling of the boundary layer. The accumulation with fetch over the ice of changes in the surface wind field are shown to have a large effect on estimates of the surface wind stress. We speculate that the Andreas et al. estimates of the drag coefficient over the compact sea ice are too high. Keywords: Atmospheric boundary layers; and Air-sea-ice interaction.

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