1. Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, USA.
2. Department of Earth and Environmental Sciences, Columbia University, New York, NY 10027, USA.
3. Department of Geography, University of Utah, Salt Lake City, UT 84112, USA.
4. Center for Water, Climate, and Environmental Policy, Bumthang, Bhutan.
5. School of Earth and Climate Sciences and Climate Change Institute, University of Maine, Orono, ME 04469, USA.