edu.ucar.gdex::d299000 eng; USA utf-8 dataset NSF NCAR Geoscience Data Exchange datahelp@ucar.edu https://gdex.ucar.edu NSF NCAR Geoscience Data Exchange The Geoscience Data Exchange (GDEX), managed by the Computational and Information Systems Laboratory (CISL) at NSF NCAR, contains a large collection of meteorological, atmospheric composition, and oceanographic observations, and operational and reanalysis model outputs, integrated with NSF NCAR High Performance Compute services to support atmospheric and geosciences research. download pointOfContact 2026-04-21T02:53:14Z ISO 19115 Geographic Information - Metadata ISO19115:2003/Cor 1 2006 https://doi.org/10.5065/D6QF8R93 Dai Global Palmer Drought Severity Index (PDSI) d299000 2017-05-01 publication Dai, Aiguo author NSF National Center for Atmospheric Research publisher 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. onGoing datahelp@ucar.edu pointOfContact irregular dataset https://gdex.ucar.edu/images/ds_logos/default_200_200.png Logo thumbnail from URL png NetCDF dataset Resource Type 2021-03-30 revision 4.4 DataCite Metadata Working Group orginator resourceTypeGeneral GROUND-BASED OBSERVATIONS > GROUND-BASED OBSERVATIONS U.S. National Aeronautics and Space Administration Global Change Master Directory GCMD 2026-04-15 revision 23.7 NASA Global Change Master Directory orginator Valids List: Platforms EARTH SCIENCE > CLIMATE INDICATORS > LAND SURFACE/AGRICULTURE INDICATORS > DROUGHT INDICES > PALMER DROUGHT SEVERITY INDEX U.S. National Aeronautics and Space Administration Global Change Master Directory GCMD 2026-04-15 revision 23.7 NASA Global Change Master Directory orginator Valids List: Science and Services Keywords Creative Commons Attribution 4.0 International License None eng utf-8 climatologyMeteorologyAtmosphere 1850-01-01T000000+00 2018-12-31T230000+00 NSF NCAR Geoscience Data Exchange datahelp@ucar.edu https://gdex.ucar.edu distributor 265.959 https://gdex.ucar.edu/datasets/d299000/ https Dataset Description Related Link information https://gdex.ucar.edu/datasets/d299000/dataaccess/ https Data Access Related Link download none asNeeded