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. Additionally, ensemble mean monthly sc_PDSI_pm data on a 2.5 degree grid has been calculated from 1900-2099 (for CMIP5) and 1900-2100 (for CMIP6) based on one historical and future (under RCP4.5 for CMIP5), and SSP2-4.5 (similar to RCP4.5) and SSP5-8.5 (similar to RCP8.5 for CMIP5) simulation by each of the 14 CMIP5 models and 25 CMIP6 models. These sc_PDSI_pm data from individual runs were simply averaged to produce the multiple model ensemble mean. 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.
1850-01-01 00:00:00 to 2018-12-31 23:00:00
|Palmer Drought Severity Index
Department of Atmospheric and Environmental Sciences, College of Arts and Sciences, State University of New York, Albany
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