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Encounter of Foehn Wind with an Atmospheric Eddy over the Black Sea as Observed by the Synthetic Aperture Radar Onboard Envisat

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  • 1 Institute of Oceanography, Centre for Marine and Atmospheric Sciences (ZMAW), University of Hamburg, Hamburg, Germany
  • | 2 P.P. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia
  • | 3 Nansen Environmental and Remote Sensing Center, Bergen, Norway
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Abstract

Foehn wind blowing through the Kolkhida (Kolkheti) Lowland in the southwestern Caucasus (western Georgia) was observed on an Envisat synthetic aperture radar (SAR) image as it encountered an atmospheric cyclonic eddy over the Black Sea on 13 September 2010. This SAR image reveals unprecedented finescale features of the near-surface wind fields that cannot be resolved by other sensors. It shows, among others, the deflection of the foehn wind by the atmospheric eddy. Quantitative information on the near-surface wind field over the sea is extracted from the SAR image.

Corresponding author address: Werner Alpers. Institute of Oceanography, Centre for Marine and Atmospheric Sciences (ZMAW), University of Hamburg, Bundesstrasse 53, D-20146 Hamburg, Germany. E-mail: werner.alpers@zmaw.de

Abstract

Foehn wind blowing through the Kolkhida (Kolkheti) Lowland in the southwestern Caucasus (western Georgia) was observed on an Envisat synthetic aperture radar (SAR) image as it encountered an atmospheric cyclonic eddy over the Black Sea on 13 September 2010. This SAR image reveals unprecedented finescale features of the near-surface wind fields that cannot be resolved by other sensors. It shows, among others, the deflection of the foehn wind by the atmospheric eddy. Quantitative information on the near-surface wind field over the sea is extracted from the SAR image.

Corresponding author address: Werner Alpers. Institute of Oceanography, Centre for Marine and Atmospheric Sciences (ZMAW), University of Hamburg, Bundesstrasse 53, D-20146 Hamburg, Germany. E-mail: werner.alpers@zmaw.de
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