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. 2015 Sep 8;5:13799. doi: 10.1038/srep13799

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(a) The values represent the maximum correlation recorded (Pearson coefficient, R) for each pixel, independently of the month of the year and the SPI time-scale. (b) SPI time-scales at which the maximum correlation between SPI and WUE recorded. Areas with no significant correlations (p>0.05) are indicated in white. This figure was produced using ArcGIS 10.0.