A portion of this work was performed at the National High Magnetic Field Laboratory, which is supported by the National Science Foundation Division of Chemistry and Division of Materias Research through Cooperative Agreement No. DMR-1644779 and the State of Florida.
All software for mass spectral data processing is publicly available located here: https://nationalmaglab.org/user-facilities/icr/icr-software.
Data and supplementary tables and gures are attached as supplemental information and are available aspart of the Hydroshare archive for this work (Abbott & Ewing, 2020), which includes analytical code usedto derive gures.
E. W. and S. A. E. acknowledge funding from the Montana Agricultural Experimental Station (MAES project number MONB00389) and the National Park Service via the Northwest Alaska and Rocky Mountain Cooperative Ecosystem Study Units (CESUs), as well as the MSU Bayard Taylor Fellowship. B. W. A., J. P. Z., and J. L. C. acknowledge support from the U.S. National Science Foundation (NSF awards: 1446328, 1846855, 1637459, 1916567, and 1916565). J. F. D. and J. E. V. acknowledge funding from the program of the Netherlands Earth System Science Centre (NESSC), financially supported by the Ministry of Education, Culture and Science (OCW;
grant number 024.002.001). S. S., S. Z., and S. E. T. acknowledge funding from the Natural Sciences and Engineering Research Council of Canada (NSERC), the Polar Continental Shelf Program, the University of Alberta Northern Research Awards Program, and the Northern Scientific Training Program. M. A. B. recognizes partial NSF support from award numbers 1208732 and 1754216. R. G. M. S and S. R. T. acknowledge funding from NSF (award number 1464392); R. G. M. S., S. R. T., K. P. W., and S. S. W. F. acknowledge funding from the NASA‐ABoVE Project 14‐14TE‐0012 (NNX15AU07A) and the USGS Biological Carbon Sequestration Program; J. O. was supported by funding from the National Park Service Inventory and Monitoring program and the USGS Changing Arctic Ecosystems program.
