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. 2017 Jun 19;7:3845. doi: 10.1038/s41598-017-04140-7

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© The Author(s) 2017

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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Comparison of simulated permafrost distribution in the baseline period (1981–2010) with the existing frozen soil maps: (a) Simulated results in the baseline period (1981–2010), (b) frozen soil map from Shi et al.⁴⁶ (The data set was obtained from Environmental and Ecological Science Data Center for West China, National Natural Science Foundation of China, http://westdc.westgis.ac.cn), and (c) map of permafrost on the QTP from Li and Cheng⁴⁷ (The data set was obtained from Cold and Arid Regions Sciences Data Center at Lanzhou, http://westdc.westgis.ac.cn). (The figure was created using ArcGIS 10.1 http://www.esri.com/ software).