Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
, 323 (5920), 1443-8

Wind-driven Upwelling in the Southern Ocean and the Deglacial Rise in Atmospheric CO2

Affiliations

Wind-driven Upwelling in the Southern Ocean and the Deglacial Rise in Atmospheric CO2

R F Anderson et al. Science.

Abstract

Wind-driven upwelling in the ocean around Antarctica helps regulate the exchange of carbon dioxide (CO2) between the deep sea and the atmosphere, as well as the supply of dissolved silicon to the euphotic zone of the Southern Ocean. Diatom productivity south of the Antarctic Polar Front and the subsequent burial of biogenic opal in underlying sediments are limited by this silicon supply. We show that opal burial rates, and thus upwelling, were enhanced during the termination of the last ice age in each sector of the Southern Ocean. In the record with the greatest temporal resolution, we find evidence for two intervals of enhanced upwelling concurrent with the two intervals of rising atmospheric CO2 during deglaciation. These results directly link increased ventilation of deep water to the deglacial rise in atmospheric CO2.

Comment in

  • Climate change. Shifting westerlies.
    Toggweiler JR. Toggweiler JR. Science. 2009 Mar 13;323(5920):1434-5. doi: 10.1126/science.1169823. Science. 2009. PMID: 19286540 No abstract available.

Similar articles

See all similar articles

Cited by 70 articles

See all "Cited by" articles

Publication types

LinkOut - more resources

Feedback