太平洋西北国家实验室（PNNL）的赵纯博士于2015年5月15日访问了我们的研究小组，并就估算人为和生物排放及其对空气质量的潜在影响进行了演讲。赵博士对空气质量的研究包括对大气气溶胶及其对气候的直接和间接影响进行建模，对大气化学和运输过程进行建模以及空气污染与气候变化之间的相互作用。

     Dr. Chun Zhao from Pacific Northwest National Laboratory (PNNL) visited our group on 15 May 2015 and gave us a talk on estimating anthropogenic and biogenic emissions and their potential impacts on air quality. Dr. Zhao's research on air quality includes modeling of atmospheric aerosols and their direct and indirect effects on climate, modeling of atmospheric chemistry and transport processes, and interaction between air pollution and climate change.