主讲人简介：Dr. Wu got his BE degree from Tsinghua University in 1998 and PhD degree from Harvard University in 2007. He has been an Assistant Professor at Michigan Technological University since 2008. His major research areas include atmospheric chemistry and air quality as well as their interactions with climate, anthropogenic emissions and land use/land cover. He received National Faculty Enhancement Award and Early Career Award from US EPA in 2010.

讲座简介：Ozone air quality and tropsopheric chemistry is closely affected by multiple factors in the context of global change such as changes in anthropogenic emissions, climate, land use and land cover as well as changes in stratosphere ozone. Stratospheric ozone has experienced significant depletion since the late 1970s, especially over the high latitude regions and is expected to recover in the coming century. The changes in stratospheric ozone column could strongly affect photochemistry in the troposphere by affecting the solar actinic flux. An increase in ozone column implies decreased ozone photolysis rate and hence increased atmospheric lifetime of ozone in the troposphere.  This presentation will focus on the effects of stratospheric ozone change on photochemistry and air quality in the troposphere and will also compare these effects with those due to other factors (changes in climate, land use/land cover and anthropogenic emissions).