1. Atmospheric Sciences and Global Change Division; Pacific Northwest National Laboratory; Richland Washington USA
2. Institute of Earth Sciences; Hebrew University of Jerusalem; Jerusalem Israel
3. Chinese Academy of Meteorological Sciences; Beijing China
4. Department of Atmospheric and Oceanic Science and ESSIC; University of Maryland; College Park Maryland USA
5. State Key Laboratory of Earth Surface Processes and Resource Ecology and Joint Center for Global Change Studies; Beijing Normal University; Beijing China