Zhuo Wang, University of Illinois at Urbana Champaign, Urbana, IL, United States, Gan Zhang, Princeton University, Atmospheric and Oceanic Sciences Program, Princeton, NJ, United States, Timothy J Dunkerton, Northwest Rsch Associates Inc, Bellevue, WA, United States and Fei-Fei Jin, University of Hawaii at Manoa, Honolulu, HI, United States