Observed Hemispheric Asymmetry in Global Sea Ice Changes

Author:

Cavalieri D. J.1,Gloersen P.1,Parkinson C. L.1,Comiso J. C.1,Zwally H. J.1

Affiliation:

1. Laboratory for Hydrospheric Processes, NASA Goddard Space Flight Center, Code 971, Greenbelt, MD 20771, USA.

Abstract

From November 1978 through December 1996, the areal extent of sea ice decreased by 2.9 ± 0.4 percent per decade in the Arctic and increased by 1.3 ± 0.2 percent per decade in the Antarctic. The observed hemispheric asymmetry in these trends is consistent with a modeled response to a carbon dioxide–induced climate warming. The interannual variations, which are 2.3 percent of the annual mean in the Arctic, with a predominant period of about 5 years, and 3.4 percent of the annual mean in the Antarctic, with a predominant period of about 3 years, are uncorrelated.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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