Sea ice concentrations in the Weddell Sea: A comparison of SSM/I, ULS, and GCM data

Connolley, W.M.. 2005 Sea ice concentrations in the Weddell Sea: A comparison of SSM/I, ULS, and GCM data. Geophysical Research Letters, 32 (7), L07501. 4, pp. 10.1029/2004GL021898

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Abstract/Summary

The sea ice fraction in the interior of the pack, especially in winter, is important for climate studies and for validation of sea ice models. When ice concentration is high, a difference of only a few percent in ice fraction can have a major effect on the ocean-air fluxes. Satellite estimates of the ice fraction in the Antarctic winter based on microwave emissions are typically 90–95%, with values from the “Bootstrap” algorithm higher than the “NASA team”. However coupled ocean-atmosphere models usually show higher concentrations. A recent evaluation for the Arctic has shown that the true winter ice fractions can be very high, above 99%. Upward looking sonar data from the Weddell Sea is used to show that Antarctic concentrations are higher than previously estimated, and to reevaluate climate model results in this light. The bootstrap algorithm is found to provide a better fit to the sonar data.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1029/2004GL021898
Programmes:	BAS Programmes > Antarctic Science in the Global Context (2000-2005) > Antarctic Climate Processes
ISSN:	0094-8276
Additional Keywords:	Sea ice, Distribution, Remote sensing
NORA Subject Terms:	Marine Sciences Atmospheric Sciences
Date made live:	19 Dec 2007 15:00 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/1726

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