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. 2016 Oct 7;6:35105. doi: 10.1038/srep35105

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Copyright © 2016, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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Comparison of trends of NDVI and precipitation for April–October (a–g) (note that the maps are further interpolated from the maps with a spatial resolution of 0.5° × 0.5°). Statistically significant (the absolute value of MK test equal to or greater than 1.96) positive trends are denoted as + S, negative trends as −S and insignificant ones as 0. The first character in each pair right the color bar denotes NDVI trend and the second one denotes precipitation trend. This figure was generated using ArcGIS 10.1 (http://www.esri.com/software/arcgis/).