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Science 11 January 2008:
Vol. 319. no. 5860, p. 159
DOI: 10.1126/science.1150011
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Technical Comments

Response to Comment on "The Southern Ocean Biological Response to Aeolian Iron Deposition"

Nicolas Cassar,1* Michael L. Bender,1 Bruce A. Barnett,1 Songmiao Fan,2 Walter J. Moxim,2 Hiram Levy, II,2 Bronte Tilbrook3

Net community production in the Southern Ocean is correlated with simulated local dust deposition, and more so with modeled deposition of soluble iron. Model simulations of the latter two properties are consistent with observations in both hemispheres. These results provide strong evidence that aerosol iron deposition is a first-order control on net community production and export production over large areas of the Southern Ocean.

1 Department of Geosciences, Princeton University, Princeton, NJ 08544, USA.
2 Geophysical Fluid Dynamics Laboratory, National Oceanic and Atmospheric Administration, P.O. Box 308, Princeton, NJ 08542, USA.
3 Commonwealth Scientific and Industrial Research Organisation, Wealth from Oceans Flagship and Antarctic Climate and Ecosystem Cooperative Research Center, Hobart, Tasmania 7001, Australia.

* To whom correspondence should be addressed. E-mail: ncassar{at}princeton.edu

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