An exploration of the aerosol indirect effects in East Asia using a regional climate model

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Zeinab Salah
Allison Steiner
Ashraf Saber Zakey
Ahmed Shalaby
M. M. Abdel Wahab


In this study, the aerosol direct, semi-direct and indirect effects on the East Asia climate are investigated using the International Center for Theoretical Physics Regional Climate Model v. 4 (RegCM4.1.1), by focusing on the East Asian Summer Monsoon temperature and precipitation. The externally mixed aerosols, including sulfate (SO42–), black carbon and organic carbon, reduced the solar flux reaching the surface directly by scattering solar radiation, and indirectly by increasing the cloud droplet concentration and cloud liquid water path over East China. The combined aerosol effects (direct and indirect) decreased the temperature on the continent and increased it over the oceans, leading to the reduction of rainfall in the central regions of China and an enhancement of rainfall in the adjacent ocean regions.


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Author Biographies

Allison Steiner, University of Michigan Space Research Building 2455 Hayward St. Ann Arbor, MI 48109-2143

Climate and Space Sciences and Engineering

M. M. Abdel Wahab, Cairo University P.O: 12613, Giza, Egypt.

Faculty of Science

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