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Detailed Reference Information |
Bopp, L., Aumont, O., Cadule, P., Alvain, S. and Gehlen, M. (2005). Response of diatoms distribution to global warming and potential implications: A global model study. Geophysical Research Letters 32: doi: 10.1029/2005GL023653. issn: 0094-8276. |
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Using a global model of ocean biogeochemistry coupled to a climate model, we explore the effect of climate change on the distribution of diatoms, a key phytoplankton functional group. Our model results suggest that climate change leads to more nutrient-depleted conditions in the surface ocean and that it favors small phytoplankton at the expense of diatoms. At 4xCO2, diatoms relative abundance is reduced by more than 10% at the global scale and by up to 60% in the North Atlantic and in the subantarctic Pacific. This simulated change in the ecosystem structure impacts oceanic carbon uptake by reducing the efficiency of the biological pump, thus contributing to the positive feedback between climate change and the ocean carbon cycle. However, our model simulations do not identify this biological mechanism as a first-order process in the response of ocean carbon uptake to climate change. |
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BACKGROUND DATA FILES |
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Abstract |
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Keywords
Global Change, Impacts of global change, Global Change, Biogeochemical cycles, processes, and modeling (0412, 0414, 0793, 4805, 4912), Oceanography, Biological and Chemical, Carbon cycling, Oceanography, Biological and Chemical, Biogeochemical cycles, processes, and modeling (0412, 0414, 0793, 1615, 4912), Oceanography, Biological and Chemical, Ecosystems, structure, dynamics, and modeling |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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