大气科学研究论坛
报告地点：地空学院行政楼706会议室
报告时间：星期一,2019-07-01 14:30 - 16:30
报告人：Yuhang Wang
报告人简介：
Yuhang Wang was born in Xian and grew up in Beijing. After his B.S. degree in Atmospheric Science from Peking University, he went to study in the United States and had a Ph.D. degree in Atmospheric Chemistry from Harvard University. He is currently a professor at Georgia Institute of Technology. He research interests include tropospheric oxidants, their precursors and proxies, aerosol sources and transport, multiscale modeling of atmospheric chemical and transport processes, kinetics of gas phas
报告题目：Aerosol climate forcing: Wildfire feedback and brown carbon
报告内容简介
Radiative forcing plays a significant role in the global climate system. Light-absorbing carbonaceous aerosols, such as black carbon (BC) and brown carbon (BrC), significantly affect the global radiative forcing. We investigate the photo-bleaching effect and convective transport of BrC on the basis of Studies of Emissions, Atmospheric Composition, Clouds and Climate Coupling by Regional Surveys (SEAC4RS) and Deep Convective Clouds and Chemistry Project (DC-3) measurements. These two processes have not been consistently implemented in BrC modeling in the past. We discuss the relative importance of these two processes on BrC distribution and the contributions of BrC (and BC) on DRE, precipitation, mass flux of deep convection, and the expansion of the tropics. Using a newly developed fire module for the climate modeling system, we investigate the interactions between fire aerosol emissions and climate. We show that these interactions and feedback processes extend short-term aerosol forcing into time scales of the climate system.