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Science 1 February 2008:
Vol. 319. no. 5863, p. 570
DOI: 10.1126/science.1146886
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Technical Comments

Comment on "Saturation of the Southern Ocean CO2 Sink Due to Recent Climate Change"

Kirsten Zickfeld,1* John C. Fyfe,2 Michael Eby,1 Andrew J. Weaver1

We disagree with the conclusion of Le Quéré et al. (Reports, 22 June 2007, p. 1735) that poleward intensifying winds could continue to weaken the Southern Ocean sink in the future. We argue that altered winds, along with rising atmospheric carbon dioxide, will likely increase the efficiency of this sink in the 21st century.

1 School of Earth and Ocean Sciences, University of Victoria, Victoria, BC, V8W 3P6, Canada.
2 Canadian Centre for Climate Modelling and Analysis, Environment Canada, Victoria, BC, Canada.

* To whom correspondence should be addressed. E-mail: zickfeld{at}ocean.seos.uvic.ca

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Science. ISSN 0036-8075 (print), 1095-9203 (online)