Kevin M Schaefer¹, Christine Olson², Benjamin M Geyman³, Connor Olson⁴, David Streets⁴, Elsie M Sunderland⁵, Colin P Thackray⁴ and Scott Zolkos⁶, (1)National Snow and Ice Data Center, Cooperative Institute for Research in the Environmental Sciences, University of Colorado at Boulder, Boulder, Colorado, U.S.A, Boulder, United States, (2)University of Colorado at Boulder, Boulder, United States, (3)Harvard University, John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA, United States, (4)Harvard University, John A. Paulson School of Engineering and Applied Sciences, Cambridge, United States, (5)Harvard University, T. H. Chan School of Public Health, Boston, United States, (6)Woodwell Climate Research Center, Falmouth, United States