EARTH SCIENCE > CLIMATE INDICATORS > LAND SURFACE/AGRICULTURE INDICATORS > DROUGHT INDICES > PALMER DROUGHT SEVERITY INDEX
The Palmer Index or the Palmer Drought Severity Index (PDSI) is an index
formulated by Palmer (1965) and compares the actual amount of precipitation
received in an area during a specified period with the normal or average amount
expected during that same period.
Palmer, W.C., 1965: Meteorological Drought Research Paper 45, U.S.
Weather Bureau, Washington, D.C.
From: American Meterological Society, 2000: The Glossary of Meteorology, 2nd
edition, Boston, MA
See also http://www.drought.noaa.gov/palmer.html