Claudia I Czimczik, University of California Irvine, Earth System Science, Irvine, CA, United States, Shawn Pedron, University of California Irvine, Irvine, CA, United States, Xiaomei Xu, University of California, Irvine, Department of Earth System Science, Irvine, CA, United States, Jennifer Clare Walker, University of California, Irvine, Irvine, CA, United States, Eric S Klein, University of Alaska Anchorage, Geological Sciences, Anchorage, AK, United States, Eugenie Susanne Euskirchen, University of Alaska Fairbanks, Fairbanks, AK, United States and Jeffrey M Welker, University of Alaska Anchorage, Department of Biological Sciences, Anchorage, AK, United States