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Abrupt mid-twentieth-century decline in Antarctic sea-ice extent from whaling records

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Figure 1: Mean approximate ice-edge latitude in Antarctica from 1931 to 1987.
Figure 2: Mean approximate ice-edge latitude in Antarctica by 10° longitudinal sector.
Figure 3: The relationship between the latitudes of the southernmost whale catches, in terms of the factory-ship noon positions, and information on.


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I thank C. Allison and staff at the International Whaling Commission for compiling these data. I also thank I. Allison, J. Heap, H. Marchant and P. Quilty for comments.

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Correspondence to William K. de la Mare.

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Mare, W. Abrupt mid-twentieth-century decline in Antarctic sea-ice extent from whaling records. Nature 389, 57–60 (1997).

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