Guoyong Wen, Morgan State University, Baltimore, MD, United States, Alexander Marshak, NASA Goddard Space Flight Center, Greenbelt, MD, United States, Wanjuan Song, Beijing Normal University, School of Geography, Beijing, China, Yuri Knyazikhin, Boston University, Earth and Environment, Boston, MA, United States, Matti Mottus, University of Helsinki, Helsinki, Finland and Dong Liang Wu, NASA/Goddard Space Flight Cent, Greenbelt, MD, United States