Effect of ocean mesoscale variability on the mean state of tropical Atlantic climate

Details Effect of ocean mesoscale variability on the mean state of tropical Atlantic climate Effect of ocean mesoscale variability on the mean state of tropical Atlantic climate

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3309606s&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 9, CiteID L09606

Physics

13

Atmospheric Processes: Ocean/Atmosphere Interactions (0312, 4504), Atmospheric Processes: Regional Modeling, Oceanography: Physical: Air/Sea Interactions (0312, 3339), Oceanography: Physical: Eddies And Mesoscale Processes

Scientific paper

A regional coupled ocean-atmospheric model is used to investigate the effect of oceanic mesoscale features on the mean climate of the tropical Atlantic. It is shown that, compared to a non-eddy resolving ocean model, resolving oceanic mesoscale variability leads to a cooler mean equatorial cold tongue and a cooler coastal upwelling zone. This changes the meridional SST gradient, and the resulting weaker low-level convergence reduces the mean of rainfall in the marine Inter-Tropical Convergence Zone (ITCZ). The reduced rainfall and the cooler coastal upwelling regions represent a clear improvement of the model solution.

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