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| Titre | Drought Hazard Frequency 2006 (CHRR) |
| Date | 2005-03-29 (publication) |
| Edition | Version 1.0 |
| Formulaire de présentation | Map Digital |
| Langue | en |
| Jeu de caractère | Utf8 |
| Résumé | Global Drought Hazard Frequency and Distribution is a 2.5 minute grid based upon the International Research Institute for Climate Prediction'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. This dataset is the result of collaboration among the Columbia University Center for Hazards and Risk Research (CHRR), Columbia University International Research Institute for Climate Prediction (IRI), and Columbia University Center for International Earth Science Information Network (CIESIN). The source of the data is Center for Hazards and Risk Research (CHRR) at Columbia University, (http://www.ldeo.columbia.edu/chrr/research/hotspots/) and Center for International Earth Sciences Information Network (CIESIN) at Columbia University (http://www.ciesin.columbia.edu). |
| Description textuelle générale | Map data was converted for use in TerraViva!® global data-viewing software by ISCIENCES, L.L.C., Ann Arbor, Michigan, USA. The downloadable file (452KB) contains a 2 arc minute map. System requirement: To use the data files (*.xtvm) you must have TerraViva!® Global Data Viewer or TerraViva!® Global Data Analyst software installed. A free copy of TerraViva!® Global Data Viewer is available at www.terraviva.net. For more information about this map see supporting documentation in "Distribution Info" below. |
| Objectifs de la production | To provide a means of assessing the relative distribution and frequency of global drought hazard. |
| Statut | Completed |
| Catégorie du sujet | Climatology Meteorology Atmosphere |
| Mots-clés | drought, natural hazards, hotspots, disaster preparedness, CHRR (theme). |
| Mots-clés | World (place). |
| Type de représentation spatial | Grid |
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| Contraintes d'accès | |
| Propriété intellectuelle | |
| Autres contraintes | USE CONSTRAINTS: CIESIN offers unrestricted access and use of data without charge, unless specified in the documentation for particular data. All other rights are reserved. The Trustees of Columbia University in the City of New York, Center for Hazards and Risk Research (CHRR), Center for International Earth Science Information Network (CIESIN), International Bank for Reconstruction and Development/The World Bank, and the United Nations Environment Programme Global Resource Information Database Geneva (UNEP/GRID-Geneva) hold the copyright of this dataset. Users are prohibited from any commercial, non-free resale, or redistribution without explicit written permission from CHRR, CIESIN, World Bank, or UNEP/GRID-Geneva. Users should acknowledge CHRR, CIESIN, World Bank, and UNEP/GRID-Geneva as the source used in the creation of any reports, publications, new data sets, derived products, or services resulting from the use of this dataset. CHRR, CIESIN, World Bank, and UNEP/GRID-Geneva also request reprints of any publications and notification of any redistributing efforts. CITATION: 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 2005. Global Drought Hazard Frequency and Distribution Palisades, NY: CHRR, Columbia University. Available at: http://www.ldeo.columbia.edu/chrr/research/hotspots/. ADDITIONAL CITATION: Dilley, M., R.S. Chen, U. Deichmann, A.L. Lerner-Lam, M. Arnold, J. Agwe, P. Buys, O. Kjekstad, B. Lyon, and G. Yetman. Mar. 29, 2005. Natural Disaster Hotspots: A Flobal Risk Analysis, Version 1.0, Disaster Risk Management Series No. 5. The World Bank, Washington, DC. |
| Fréquence de mise à jour | As Needed |
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| Nom de l'organisme | Center for Hazards and Risk Research (CHRR), Columbia University; Center for International Earth Science Information Network (CIESIN), Columbia University; International Bank for Reconstruction and Development/World Bank |
| Responsabilité | Originator |
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