The role of convective plumes and vortices on the global aerosol budget

Geophysical Research Letters - Tập 32 Số 18 - 2005
Jacquelin Koch1, N. O. Rennó1
1Atmospheric, Oceanic, and Space Sciences; University of Michigan; Ann Arbor Michigan USA

Tóm tắt

Atmospheric aerosols produce both a direct radiative forcing by scattering and absorbing solar and infrared radiation, and an indirect radiative forcing by altering cloud processes. Therefore, it is essential to understand the physical processes that contribute to the global aerosol budget. The International Panel on Climate Change (IPCC) reports that mineral dust contributes to ∼1/3 of all primary particle emissions to the atmosphere. The significance of mineral dust aerosol becomes evident when one considers the large surface area of arid and semi‐arid regions on most continents. It is evident from observations in the U.S. Southwest that convective plumes and vortices lift large quantities of desert dust. Here, we use a combination of observational data and theory to determine the role of convective plumes and vortices on the global aerosol budget. We show that convective plumes and vortices contribute to about 35% of the global budget of mineral dust.

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Geophysical Research Letters

Tập 32 Số 18

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