Fig. 2: Trends of annual soil drying rate (in the SM range of 0−30th percentile) and corresponding atmospheric factors in wet and dry regions during 1980–2020 based on ERA5, GLEAM, MERRA-2, and in-situ observation data.
From: Accelerated soil drying linked to increasing evaporative demand in wet regions
a, b Trends of annual soil drying rate in wet and dry regions during 1980–2020. c, d Same as a, b but for P. e, f Same as a, b but for ET. g–i Trends of annual soil drying rate, P, and ET in wet and dry regions based on in-situ observation data. The linear annual trends of soil drying rate, P, and ET are estimated based on the Sen’s slope estimator, and statistical significances in trends are determined based on the MK test. * represents the statistically significant trend at the level of 0.05.
