On the radiative effects of dust on tropical convection

Details On the radiative effects of dust on tropical convection On the radiative effects of dust on tropical convection

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3123112s&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 23, CiteID L23112

Physics

13

Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801), Atmospheric Composition And Structure: Cloud Physics And Chemistry, Meteorology And Atmospheric Dynamics: Convective Processes

Scientific paper

Radiative-convective equilibrium experiments with a two-dimensional cloud resolving model illustrate the influence of a lofted absorbing dust layer on the organization of tropical convection. At quasi-equilibrium, the dust-covered region of the model exhibits increased occurrence of deep convection compared to the dust-free region but with reduced convection in the dust-free region controlled in part by a large-scale monsoon-like circulation forced by the aerosol radiative heating. The dry air associated with the dust layer inhibits convection initially over most of the dust-covered region with convection occurring predominantly at the lateral boundaries of the layer. This behavior reproduces features which have been observed in cases of Saharan dust transport over the tropical Atlantic.

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