Figure 1
From: Multi-decadal trends in global terrestrial evapotranspiration and its components
Validation of the PML-ET model.
(a) Comparison of the estimated mean annual ET (1981–2012, mm year−1) to catchment ET (P–Q) observations in 643 catchments (red dots in the global map). (b) Comparison of estimated annual ET trend (mm year−2) to catchment annual ET (P–Q) for 46 large catchments (>10, 000 km2) with less than 3-year missing data. (c) Comparison of the estimated ET (mm month−1) to the measured ET at 95 flux sites (red dots in the global map). (d) Annual anomalies of the estimated ET, ET components and catchment observed ET (P–Q), all aggregated from catchments (number of catchments per year provided using grey bars) with annual Q observations. (e) Annual anomalies of the estimated ET, ET components and the observed microwave soil moisture, all aggregated between 40 °N and 40 °S (area covered by the microwave soil moisture data). Error bars for ET and its components are s.d. obtained from the two PML simulations. Error bars for P–Q are s.d. obtained from the two precipitation datasets. R2 in Fig. 1(a–d) is obtained from comparing measured ET and estimated ET. R2 in Fig. 1(e) is obtained from comparing soil moisture and estimated Es. The maps were generated using a commercial software MATLAB.
