Yan Cheng, Stefan Oehmcke, Martin Brandt, University of Copenhagen, Denmark; Adrian Das, Lisa Rosenthal, US Geological Survey, United States; Sassan Saatchi, Fabien Wagner, California Institute of Technology, United States; Anton Vrieling, University of Twente, Netherlands; Wim Verbruggen, Claus Beier, Stephanie Horion, University of Copenhagen, Denmark