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Letter

Nature Geoscience 2, 341–343 (1 May 2009) | doi:10.1038/ngeo467

September sea-ice cover in the Arctic Ocean projected to vanish by 2100

Julien Bo|[eacute]| , Alex Hall & Xin Qu

The Arctic climate is changing rapidly. From 1979 to 2006, September sea-ice extent decreased by almost 25|[percnt]| or about 100,000|[thinsp]|km2|[nbsp]|per|[nbsp]|year (ref.|[nbsp]|2).