Fig. 8: Potential drought refugia across California.
From: Establishing ecological thresholds and targets for groundwater management
a, Groundwater-dependent vegetation polygons are Natural Communities Commonly Associated with Groundwater (NCCAG) vegetation polygons (n = 246,017 polygons). Potential drought refugia are based on the frequency of ZNDVI ≥ 0 during drought years over the 1985–2022 study period. b, NDVI time series for select drought refugia examples, where drought years are shaded in gold.
