Fig. 2
Spatial and temporal patterns of WUE in the SRB from 2001 to 2020. (a) Multi-year average WUE pattern; (b) Univariate linear change of WUE over the past 20 years; (c) WUE change trend over the past 20 years (EDT: Extremely Significant Decline; SDT: Significant Decline; NDT: Not Significantly Decline; NUT: Not Significantly Increase; SUT: Significantly Increase; EUT: Extremely Significant Increase); (d) Yearly change of WUE (the left Y-axis represents the cumulative percentage of areas in different WUE ranges; the right Y-axis represents the annual average value of WUE); (e) WUE change trend in different ecological functional areas (the left Y-axis represents the percentage of areas with different WUE change trends in each ecological functional zone over the past 20 years, where the negative Y-axis indicates the area with a declining WUE trend; the right Y-axis represents the average rate of WUE change over 20 years in each ecological functional zone); (f) Monthly change trend of WUE (the left Y-axis represents the percentage of areas with different WUE change trends in each month over the past 20 years, where the negative Y-axis indicates the area with a declining WUE trend; the right Y-axis represents the average rate of WUE change over 20 years for each month).
