1 Department Environmental Science and Energy Research, Weizmann Institute of Sciences, Rehovot 76100, Israel 2 Max Planck Institute for Chemistry, Biogeochemistry Department, P.O. Box 3060, 55020 Mainz, Germany 3 The Remote Sensing Laboratory, Jacob Blaustein Institute for Desert Research, Ben-Gurion University of the Negev, Sde Boker Campus, 84990, Israel 4 The Desertification and Restoration...