Dr. Long Cao is a professor at the Department of Atmospheric Sciences, School of Earth Sciences of Zhejiang University, China. He received his Ph.D. in Atmospheric Sciences at the University of Illinois at Urbana-Champaign. He then worked at the Department of Global Ecology at Carnegie Institution as a post-doctoral research fellow and Senior Research Associate. His primary research interest is to use climate and Earth system models to explore climate system response to external forcings, which includes, but not limited to, climate response to changes in greenhouse gases and aerosols, interaction between the ocean carbon cycle, ocean acidification, and climate change, and climate response to geoengineering. He served as a contributing author of the Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report, and is serving as a lead author of the upcoming IPCC Sixth Assessment Report. He is author or co-author of over 50 peer-reviewed publications. He is also one of the key members involving in the first National geoengineering research program in China.