all edu.ucar.rda GRID NetCDF Freely Available This dataset consists of monthly Palmer Drought Severity Index (PDSI) over global land areas on a 2.5 degree grid computed using observed monthly surface air temperature and precipitation, plus other surface meteorological forcing data for the self calibrating PDSI Penman Monteith (sc_PDSI_pm) case. The PDSI can be used as a measure of surface aridity anomalies and changes on seasonal to longer time scales. It is correlated with observed soil moisture and water storage variations over land. SUNY-ALBANY/CAS/ATMOS NCAR/RDA 27.13 2021-11-04T21:44:34.752Z 27.14 2021-11-04T21:45:36.439Z 71.37 2022-02-25T16:53:46.402Z 64.25 2021-04-16T16:10:10.359Z 76.04 2021-11-04T21:50:16.166Z