NCAR CGD CAS Indices: Palmer Drought Severity Index from the National Center for Atmospheric Research Resolution: 2.5x2.5; Longitude: global; Latitude: [58.75S,76.25N]; Time: [Jan 1860,Dec 1995]; monthly
NCAR CGD CAS Indices PDSI2004: Palmer Drought Severity Index (2004) from the National Center for Atmospheric Research Resolution: 2.5x2.5; Longitude: global; Latitude: [58.75S,76.25N]; Time: [Jan 1870,Dec 2002]; monthly