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Science 22 November 1996:
Vol. 274. no. 5291, pp. 1346 - 1350
DOI: 10.1126/science.274.5291.1346
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Reports

Oceanic Carbon Dioxide Uptake in a Model of Century-Scale Global Warming

Jorge L. Sarmiento * and Corinne Le Quéré

In a model of ocean-atmosphere interaction that excluded biological processes, the oceanic uptake of atmospheric carbon dioxide (CO2) was substantially reduced in scenarios involving global warming relative to control scenarios. The primary reason for the reduced uptake was the weakening or collapse of the ocean thermohaline circulation. Such a large reduction in this ocean uptake would have a major impact on the future growth rate of atmospheric CO2. Model simulations that include a simple representation of biological processes show a potentially large offsetting effect resulting from the downward flux of biogenic carbon. However, the magnitude of the offset is difficult to quantify with present knowledge.

Program in Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ 08544, USA.
*   To whom correspondence should be addressed.

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