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. 2016 Mar 17;6:23284. doi: 10.1038/srep23284

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(a) Pearson’s coefficient between annual WUE and wetness index for each flux site. (*) indicates the regression is significant at the significance level of 90% (not at 95% due to a limited number of years at each site), and (b) Spatial distribution of Pearson’s coefficient (r) between detrended annual MTE-WUE and detrended annual PDSI series. Dashed grey lines are separated by 30° latitude or longitude from the equator and 0° E (as in all maps). Map was created using ArcMap 10.2 (http://www.esri.com/software/arcgis/arcgis-for-desktop).