The hypothesis being explored is that the intensity of the summer sub-tropical anticyclones, particularly in the eastern oceanic regions, is due to the poleward excursion of the monsoon convective heating over the continent to the east. This forces descent in th eastern oceanic region. The consequent dominance of radiative cooling here acts to enhance the descent. Balancing the vortex shrinking near the surface there is an equatorward flow, the intense eastern portion of the anticyclone. The equatorward wind produces coastal upwelling which acts to further suppress deep convection.
For this study short period time integrations of a baroclinic model are used to look at the response to various portions of the average diabatic heating and cooling in the summer hemisphere. The picture has been put together for the North Pacific and now other summer sub-tropical anticyclones are under investigation
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