1. School of Atmospheric Sciences, Nanjing University, Nanjing 210023, China
2. Jiangsu Collaborative Innovation Center for Climate Change, Nanjing University, Nanjing 210023, China
3. Institute for Climate and Global Change Research, Nanjing University, Nanjing 210023, China
4. Department of Earth, Ocean, and Atmospheric Science, and Center for Ocean-Atmospheric Prediction Studies, Florida State University, Tallahassee, FL 32306, USA