Impact of Carbonaceous Aerosols over Indian Region

Asia is the region of the great source of global black carbon emission and this trend is expected to increase in the near future. Black carbon (BC) stands after only carbon dioxide (CO2) in the list of climate change contributors. BC can directly absorb solar radiation or mix with other aerosols to form atmospheric brown clouds which absorb incoming solar radiation and prevent it from reaching the surface, warming the atmosphere. Thus, in this study, the Laboratoire de Meteorologie Dynamique model (LMD, version 3.3) is used to investigate the possible effect of BC over India. LMDZ.3.3 is integrated for different years for the Indian southwest monsoon periods over the globe for the resolution 96x72x19 (approx. 300 km). The sensitivity studies for BC are in progress. This study concerns about the influence of black carbon aerosols over India for the monsoon periods on the atmospheric radiation transfer and over the precipitation. The simulation results show that BC aerosol induces a positive radiative forcing at the top of the atmosphere, and a negative radiative forcing at the surface in this region. However, the impact of BC over rainfall is different and complex for different places.