Phytoplankton influences on tropical climate

Details Phytoplankton influences on tropical climate Phytoplankton influences on tropical climate

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29w..19t&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 23, pp. 19-1, CiteID 2104, DOI 10.1029/2002GL015434

Mathematics

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16

Global Change: Climate Dynamics (3309), Oceanography: Physical: El Nino, Oceanography: Physical: Air/Sea Interactions (0312), Oceanography: Biological And Chemical: Plankton, Oceanography: Biological And Chemical: Ecosystems, Structure And Dynamics

Scientific paper

We study the effect of ocean biology on tropical surface temperatures using a simplified coupled atmosphere-ocean model. It is shown that moderate phytoplankton blooms, occuring e.g. during La Niña conditions, lead to a vertical redistribution of heat in the surface layers and an associated surface layer warming of about 20 W/m2. The positive air-sea coupling in the eastern equatorial Pacific plays an important role in amplyfying this signal, thereby damping La Niña conditions. This temperature-regulating feedback acts as a biological thermostat within the surface ocean and influences also the amplitude and asymmetry of the El Niño-Southern Oscillation.

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