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Observations of supercooling and frazil ice formation in the Laptev Sea coastal polynya

Dmitrenko, I. A., Wegner, C., Kassens, H., Kirillov, S. A., Krumpen, T., Heinemann, G., Helbig, A., Schroeder, D., Hölemann, J. A., Klagge, T., Tyshko, K. P. and Busche, T. (2010) Observations of supercooling and frazil ice formation in the Laptev Sea coastal polynya. Journal of Geophysical Research, 115 (C5). ISSN 0148-0227

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To link to this item DOI: 10.1029/2009JC005798

Abstract/Summary

This paper examines a hydrographic response to the wind‐driven coastal polynya activity over the southeastern Laptev Sea shelf for April–May 2008, using a combination of Environmental Satellite (Envisat) advanced synthetic aperture radar (ASAR) and TerraSAR‐X satellite imagery, aerial photography, meteorological data, and SBE‐37 salinity‐temperature‐depth and acoustic Doppler current profiler land‐fast ice edgemoored instruments. When ASAR observed the strongest end‐of‐April polynya event with frazil ice formation, the moored instruments showed maximal acoustical scattering within the surface mixed layer, and the seawater temperatures were either at or 0.02°C below freezing. We also find evidence of the persistent horizontal temperature and salinity gradients across the fast ice edge to have the signature of geostrophic flow adjustment as predicted by polynya models.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
ID Code:55435

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