Coupled ocean-atmosphere response to Indian Ocean warmth

Details Coupled ocean-atmosphere response to Indian Ocean warmth Coupled ocean-atmosphere response to Indian Ocean warmth

Apr 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3307713l&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 7, CiteID L07713

Other

6

Atmospheric Processes: Climatology (1616, 1620, 3305, 4215, 8408), Atmospheric Processes: Ocean/Atmosphere Interactions (0312, 4504), Oceanography: General: Ocean Acoustics, Geographic Location: Indian Ocean, Geographic Location: Atlantic Ocean

Scientific paper

The coupled ocean-atmosphere response to Indian Ocean warmth is studied. It is shown with atmospheric models that Indian Ocean warmth forces a positive polarity phase of the North Atlantic Oscillation (NAO), confirming results of previous studies. Coupled model experiments show that this NAO response forces a local air-sea feedback over the North Atlantic Ocean, which intensifies the NAO response. This enhancement is realized through a positive feedback between the NAO atmospheric circulation anomaly and a tripolar North Atlantic SST pattern, consistent with other studies on North Atlantic air-sea interactions. It is concluded that the North Atlantic and European climate response to Indian Ocean warming may be considerably greater than hitherto judged from the analyses of atmospheric model experiments alone.

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