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. 2018 Jul 24;8:11146. doi: 10.1038/s41598-018-29286-w

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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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Trends in summer maximum temperature. Color shading denotes the indicated ranges of June-August (JJA) mean maximum temperature trends during three time periods. The longer time periods are on the left column, the intermediate time periods are the center column, the shorter time periods are the right column. Shading denotes data passing a Mann-Kendal significance test at the 5% level. (a) Trends in NCD monthly mean data. (b) Trends in CRU (CRU325 and CRU401) and the two long-term reanalyses (ERA-20C and 20CRv2) daily data. The units are K/decade.