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. 2019 Apr 28;16(9):1504. doi: 10.3390/ijerph16091504

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Spatial patterns of changes in soil surface temperatures ( $S T_{\max}$ , $S T_{\min}$ , and SDTR) during 1962–2011 (°C/year) at 360 observational stations in China. The color of the circles indicates the magnitude of change. Solid circles with point indicate significance level of p < 0.05, whereas hollow circles are p > 0.05. Maps in this figure were created by ArcGIS 9.3 (ESRI, 2008).