Air Mass Modification in the Marginal Ice Zone.

• 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

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.