1. Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder Boulder CO USA
2. Department of Geological Sciences University of Colorado Boulder Boulder CO USA
3. Denver, CO USA
4. Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences Potsdam Germany
5. Institute for Arctic and Alpine Research University of Colorado Boulder Boulder CO USA
6. Earth and Environmental Sciences Division Los Alamos National Lab Los Alamos NM USA
7. Earth Lab University of Colorado Boulder Boulder CO USA
8. Department of Geology University of Kansas Lawrence KS USA