1. Institute of Northern Engineering; University of Alaska Fairbanks; Fairbanks AK USA
2. Alaska Ecoscience; Fairbanks AK USA
3. National Park Service; Fairbanks AK USA
4. US Geological Survey; Menlo Park CA USA
5. Department of Earth, Atmospheric, and Planetary Sciences and Department of Agronomy; Purdue University; West Lafayette IN USA
6. Département de géographie; Université de Montréal; Montréal QC Canada