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. 2018 Mar 20;9:1148. doi: 10.1038/s41467-018-03629-7

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 6 — Average Northern Hemisphere snowfall frequency and standard deviation. a Average Northern Hemisphere snowfall frequency as computed by the 18 different methods applied to 27 years of MERRA-2 reanalysis data. Shading represents the data included in each method (T—air temperature; H—humidity via RH, T_w, or T_d; and P—pressure). b The standard deviation of snowfall frequency plotted against average snowfall frequency for each MERRA-2 grid cell for the 18 precipitation phase methods. Shading represents the average T_s for that grid cell during precipitation events. c Density plot showing the distribution of snowfall frequency standard deviations