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

Dmitrenko, Igor A., Wegner, Carolyn, Kassens, Heidemarie, Kirillov, Sergey A., Krumpen, Thomas, Heinemann, Günther, Helbig, Alfred, Schröder, David, Hölemann, Jens A. , Klagge, Torben, Tyshko, Konstantin P. and Busche, Thomas (2010) Observations of supercooling and frazil ice formation in the Laptev Sea coastal polynya Journal of Geophysical Research - Oceans, 115 . C05015. DOI 10.1029/2009JC005798.

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Abstract

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 orizontal temperature and salinity gradients across the fast ice edge to have the signature of geostrophic flow adjustment as predicted by polynya models.

Document Type: Article
Additional Information: WOS:000277966300003
Keywords: Polar Research; Oceanography; Laptev Sea shelf; Ice formation; ASAR; Water; Shelf
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
Refereed: Yes
DOI etc.: 10.1029/2009JC005798
ISSN: 0148-0227
Projects: Polynya, Laptev Sea System
Expeditions/Models:
Date Deposited: 15 Jun 2010 10:34
Last Modified: 17 Apr 2015 10:39
URI: http://eprints.uni-kiel.de/id/eprint/8526

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