Extended Data Fig. 1: The schematic diagram of growing season drought identification using soil moisture (SM) and Normalized Difference Vegetation Index (NDVI).
From: Drought legacies delay spring green-up in northern ecosystems
A growing season effective drought occurred when deseasonalized soil moisture is below 0.5 s.d. for consecutive two months within growing season, and deseasonalized NDVI is below −0.5 s.d. east one month simultaneously. Type 1 drought: SM has not been recovered before the next growing season. Type 2 drought: SM recovered after the current growing season. Type 3 drought: SM recovered (SM anomaly higher than 0) within the current growing season. The blue background indicates the growing season, and the red background represents drought events.
