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Title:
A comprehensive view of Kara Sea polynya dynamics, sea-ice compactness and export from model and remote sensing data
Authors:
Kern, S.; Harms, I.; Bakan, S.; Chen, Y.
Affiliation:
AA(Center for Marine and Atmospheric Research, Institute of Oceanography, University of Hamburg, Hamburg, Germany), AB(Center for Marine and Atmospheric Research, Institute of Oceanography, University of Hamburg, Hamburg, Germany), AC(Max-Planck Institute for Meteorology, Hamburg, Germany), AD(Max-Planck Institute for Biogeochemistry, Jena, Germany)
Publication:
Geophysical Research Letters, Volume 32, Issue 15, CiteID L15501 (GeoRL Homepage)
Publication Date:
08/2005
Origin:
AGU
Keywords:
Cryosphere: Polynas (4540), Cryosphere: Sea ice (4540), Cryosphere: Dynamics, Oceanography: General: Marginal and semi-enclosed seas, Oceanography: General: Numerical modeling (0545, 0560)
DOI:
10.1029/2005GL023532
Bibliographic Code:
2005GeoRL..3215501K

Abstract

The Shelf Seas of the Arctic are known for their large sea-ice production. This paper presents a comprehensive view of the Kara Sea sea-ice cover from high-resolution numerical modeling and space-borne microwave radiometry. As given by the latter the average polynya area in the Kara Sea takes a value of 21.2 × 103 km2 +/- 9.1 × 103 km2 for winters (Jan.-Apr.) 1996/97 to 2000/01, being as high as 32.0 × 103 km2 in 1999/2000 and below 12 × 103 km2 in 1998/99. Day-to-day variations of the Kara Sea polynya area can be as high as 50 × 103 km2. For the seasons 1996/97 to 2000/01 the modeled cumulative winter ice-volume flux out of the Kara Sea varied between 100 km3a-1 and 350 km3a-1. Modeled high (low) ice export coincides with a high (low) average and cumulative polynya area, and with a low (high) sea-ice compactness in the Kara Sea from remote sensing data, and with a high (low) sea-ice drift speed across its northern boundary derived from independent model data for the winters 1996/97 to 2000/01.
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