Global Drought Hazard Frequency and Distribution

Mar 4, 2011 (Last modified Mar 8, 2011)
Description:
Global Drought Hazard Frequency and Distribution is a 2.5 by 2.5 minute grid based upon the International Research Institute for Climate Predition's (IRI) Weighted Anomaly of Standardized Precipitation (WASP). Utilizing average monthly precipitation data from 1980 through 2000 at a resolution of 2.5 degrees, WASP assesses the precipitation deficit or surplus over a three month temporal window that is weighted by the magnitude of the seasonal cyclic variation in precipitation. The three months' averages are derived from the precipitation data and the median rainfall for the 21 year period is calculated for each grid cell. Grid cells where the three month running average of precipitation is less than 1 mm per day ae excluded. Drought events are identified when the magnitude of a monthly precipitation deficit is less than or equal to 50 percent of its longterm median value for three or more consecutive months. Grid cells are then divided into 10 classes having an approximately equal number of grid cells. Higher grid cell values denote higher frequencies of drought occurrences. The dataset is a result of the collaboration among the Center for Hazards and Risk Research (CHRR), International Research Institute for Climate Prediction (IRI), and the Columbia University Center for International Earth Science Information Network (CIESIN).


If you wish to download this data, please visit http://www.ldeo.columbia.edu/chrr/research/hotspots/coredata.html
Data Provided By:
Center for Hazards and Risks Research (CHRR); Center for International Earth Science Information Network (CIESIN), Columbia University; International Research Institute for Climate Prediction (IRI)
Content date:
not specified
Citation:
Global Drought Hazard Frequency and Distribution. 2005. Center for Hazards and Risks Research (CHRR), Columbia University; Center for International Earth Science Information Network (CIESIN), Columbia University; International Research Institute for Climate and Society (IRI), Columbia University. Palisades, NY: CHRR, Columbia University. Available: http://www.ldeo.columbia.edu/chrr/research/hotspots/coredata.html
Spatial Resolution:
2.5 minute grid
Contact Organization:
Socioeconomic Data and Applications Center (SEDAC) User Services
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Use Constraints:
The Trustees of Columbia University in the City of New York, the Center for Hazards and Risk Research (CHRR), and the Center for International Earth Science Information Network (CIESIN) hold the copyright of this dataset. Users are prohibited from any commercial, non-free resale, or redistribution without explicit written permission from CHRR or CIESIN. Use of this data set is restricted to scientific research only. Users should acknowledge CHRR and CIESIN as the source used in the creation of any reports, publications, new data sets, derived products, or services resulting from the use of this data set. CHRR and CIESIN also request reprints of any publications and notification of any redistribution efforts.
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