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Original Articles

On the air‐sea interaction in areas of thermal marine fronts in the Greenland Sea

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Pages 596-610 | Received 26 Jun 1990, Published online: 19 Nov 2010
 

Abstract

The effects of marine fronts on the local atmospheric surface layer and air‐sea interaction were studied. Several mesoscale fronts were crossed by a research vessel in the Greenland Sea. Air temperature, humidity and stability conditions, and the fluxes of momentum, as well as sensible and latent heat, were investigated. For relatively calm conditions, close air‐sea coupling was observed in the temperature whereas for stronger winds, the air temperature of the surface layer was not markedly modified by the front below. Changes in the moisture content in the frontal area were observed and, in one case, evaporation was observed on the warm water side and condensation on the cold water side of the front. Frontal differences in heating from the sea were assumed to affect the surface‐layer wind field.

Résumé

On étudie les effets des fronts marins sur la couche de surface atmosphérique et l'interaction air‐mer. Un navire de recherche a traversé plusieurs méso‐fronts dans la mer du Groenland. On a analysé la température de l'air, l'humidité et les conditions de stabilité, et les flux de quantité de mouvement, aussi bien que les chaleurs latente et sensible. Durant les conditons de temps relativement calme, on a observé un couplage air‐mer serré de la température, alors que par vents forts, la température de l'air de la couche de surface n ‘était pas tellement modifiée par le front en‐dessous. On a observé des changements de l'humidité et, dans un cas, de l'evaporation du côté de l'eau chaude et de la condensation dans l'eau froide. On a supposé que le champ de vent de la couche de surface était affecté par les différences frontales dans le réchauffement par la mer.

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