publication . Article . 2003

Decadal decrease of Antarctic sea ice extent inferred from whaling records revisited on the basis of historical and modern sea ice records

Ackley, Stephen; Wadhams, Peter; Comiso, Josefino C.; Worby, Anthony P.;
Open Access
  • Published: 06 Jan 2003 Journal: Polar Research, volume 22, pages 19-25 (eissn: 1751-8369, Copyright policy)
  • Publisher: Norwegian Polar Institute
Abstract
In previous work, whaling catch positions were used as a proxy record for the position of the Antarctic sea ice edge and mean sea ice extent greater than the present one spanning 2.8° latitude was postulated to have occurred in the pre-1950s period, compared to extents observed since 1973 from microwave satellite imagery. The previous conclusion of an extended northern latitude for ice extent in the earlier epoch applied only to the January (mid-summer) period. For this summer period, however, there are also possible differences between ship and satellite-derived measurements. Our work showed a consistent summer offset (November– December), with the ship-observe...
Subjects
free text keywords: Earth and Planetary Sciences (miscellaneous), Oceanography, General Environmental Science, Environmental Chemistry

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