1. Luxembourg Institute of Science and Technology,Belvaux,Luxembourg
2. Qingdao University,Qingdao,China
3. Hydrology and Remote Sensing Laboratory,U.S. Department of Agriculture,Maryland,USA
4. Centre d'Etudes Spatiales de la Biosphère,Toulouse,France
5. University of California,Department of Environmental Science, Policy, and Management,Berkeley,California,USA