Cook, E.R. However, the SPI only uses precipitation and the PDSI uses temperature. Palmer, W.C., 1968: Keeping track of crop moisture conditions, nationwide: The new crop moisture index. Also, the weekly Palmer Drought Index & Crop Moisture tables have now been changed … A serially complete record of temperature and precipitation is required. This uses monthly estimates of evapotranspiration (calculated largely as a function of […], […] of the most common, for example, is the Palmer Drought Severity Index (PDSI). Palmer also developed a formula for standardizing drought calculations for each individual location based on the variability of precipitation and temperature at that location. Seasonal issues also exist, as the PDSI does not handle frozen precipitation or frozen soils well. An index value of zero represents the average moisture conditions observed between 1931 and 1990 at a given location. Global Palmer data sets have been developed based on instrumental records beginning in the 19th century. Lett., 35, L12403, doi:10.1029/2008GL033840, van der Schrier, G., K. R. Briffa, P. D. Jones, and T. J. Osborn (2006a), Summer moisture variability across Europe, J. To improve the spatial comparability, Wells et al. (Climate Data Guide; A.Dai, D.Shea), EOF 1 & 2 timeseries: PSDI: 1900-2005. 23, 1000-1009. Diese Seite wurde zuletzt am 3. of Commerce, Washington, D.C. Dai, A., 2011b: Drought under global warming: A review. It is a standardized index that generally spans -10 (dry) to +10 (wet). Juli 2018 um 14:37 Uhr bearbeitet. Nature Climate Change, 4, 17-22, Richard R. Heim Jr., 2002: A Review of Twentieth-Century Drought Indices Used in the United States. The National Drought Resilience Partnership (NDRP) comprises seven federal agencies which work collaboratively to support state, tribal, local, and private sector approaches to managing drought risks and impacts. Palmer Drought Index, auch Palmer Drought Severity Index (PDSI)) ist der am weitesten verbreitete Index für Dürre. Du, P. Sun, P.Hu (2019): Modified Palmer Drought Severity Index: Model Improvement and Application. Maps of the monthly self-calibrating Palmer drought severity index (SCPDSI) have been calculated for the period 1901–2002 for the contiguous United States (20°–50°N and 130°–60°W) and Europe (35°–70°N, 10°W–60°E) with a spatial resolution of 0.5° × 0.5° The sc_PDSI performed better than the original PDSI during the 20th century over Europe and North America. Palmer's algorithm also is used to describe wet spells, using corresponding positive numbers. It uses a 0 as normal, and drought is shown in terms of negative numbers; for example, negative 2 is moderate drought, negative 3 is severe drought, and negative 4 is extreme drought. regards The PDSI is a standardized measure, ranging from about -10 (dry) to +10 (wet) with values below -3 representing severe to extreme drought.  It was developed by meteorologist Wayne Palmer, who first published his method in the 1965 paper Meteorological Drought for the Office of Climatology of the U.S. Monthly PDSI values do not capture droughts on time scales less than about 12 months; more pros and cons are discussed in the Expert Guidance. Hydrometeorol., 9, 292–299, doi:10.1175/2007JHM929.1, Trenberth, K. E., A. Dai, G. van der Schrier, P. D. Jones, J. Barichivich, K. R. Briffa, and J. Sheffield^, 2014: Global warming and changes in drought. Palmer Drought Severity Index (PDSI) The Palmer Drought Severity Index (PDSI) uses readily available temperature and precipitation data to estimate relative dryness. Palmer Drought Index, auch Palmer Drought Severity Index (PDSI)) ist der am weitesten verbreitete Index für Dürre. Description: Gridded (0.5x0.5 degree) reconstruction of drought (Palmer Drought Severity Index, PDSI) for Europe and the Mediterranean region over the past 2,000 years, based on tree-ring data. Meteor. 1100–09, July 1984, Dai, Aiguo et al. Animations of any set of monthly maps for any period desired can be viewed by selecting the beginning and ending dates of interest. Applications: Developed mainly as a way to identify droughts affecting agriculture, it has also been used for identifying and monitoring droughts associated with other types of impacts. Res., 116, D03106. The SPI is much simpler and user to use. DOI: 10.1175/1520-0450(1984)023<1100:TPDSIL>2.0.CO;2. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the National Science Foundation. Climate, , 28, 4490–4512.