Physics
Scientific paper
Oct 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3319712c&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 19, CiteID L19712
Physics
18
Atmospheric Processes: Ocean/Atmosphere Interactions (0312, 4504), Atmospheric Processes: General Circulation (1223), Global Change: Global Climate Models (3337, 4928), Global Change: Climate Variability (1635, 3305, 3309, 4215, 4513), Global Change: Impacts Of Global Change (1225)
Scientific paper
During the second half of the twentieth century the Indian Ocean exhibited a rapid rise in sea surface temperatures (SST). It has been argued - largely on the basis of experiments with atmospheric GCMs - that this rapid warming was an important cause of remote changes in climate, in particular an increasing trend in the North Atlantic Oscillation Index and decreases in African rainfall. Here however we present evidence that the Indian Ocean warming was associated with local increases in sea level pressure (SLP). These increases are inconsistent with results from experiments in which an atmospheric GCM is forced by historical SST, which show robust decreases in SLP. The clear discrepancy between the observed and simulated trends in SLP suggests that the response of some atmospheric GCMs to the Indian Ocean warming may not provide a reliable guide to the behaviour of the real world.
Copsey Dan
Knight Jeff R.
Sutton Rowan
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