Figure 11
From: Interrelations of vegetation growth and water scarcity in Iran revealed by satellite time series
Annual vegetation growth (\(NDVI_{MEAN}*\)) on agricultural areas compared to annual total water storage anomalies (TWSA). (a): Map of Pearson correlations between \(NDVI_{MEAN}*\) and TWSA. (b): Share of highly positive correlated (R>0.6) pixels per basin. (c): At an example pixel A, the \(NDVI_{MEAN}*\) and TWSA time series and the associated Pearson’s R is plotted. (d): R values versus irrigation intensities. e: R values versus aridity. General Notes for d, e: Agricultural areas which were not existing at the start of the analyzed period are excluded (see methods). Irrigation intensity of an agricultural pixel is thereby characterized at the beginning of the period (average irrigation intensity of 2001–2003, see Fig. 9). The analysis versus aridity focuses on rather highly irrigated areas (irrigation intensity > 50). Black dots: median of all data points. red crosses: proportion of negative trends. Maps were created using Python 3.9 (https://www.python.org/).
