Global Drought Hazard

Name: Global Drought Hazard
Creator: Institute for International Law of Peace and Armed Conflict
License: http://www.opendefinition.org/licenses/cc-by

✦ DISCOVERED BY ORIONAIInstitute for International Law of Peace and Armed ConflictClimate and weatherGlobal

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About this dataset

Documentation

The Global Drought Hazard project is a collection of spatial raster datasets that provide access to statistical extreme value analyses of the Standardised Precipitation Evapotranspiration Index (6-month SPEI) to identify high risk areas on a global scale. The source data are monthly spatial raster datasets from the [Climatology and Climate Services Laboratory's Global SPEI Database](https://spei.csic.es/spei_database/#map_name=spei06) for the period from January 1902 to December 2018. Each raster dataset has a spatial resolution of about 0.5 degrees, the values of which we converted into time series for each grid cell. These time series are used to model the number of months above selected SPEI thresholds (e.g. SPEI -1.5 or lower) for a range of return periods (e.g. 100 years) via Poisson-Generalized Pareto Point Process models. Since extreme value analyses are highly influenced by non-stationarity and time dependence of the data, time-varying parameters to deal with non-stationarity, declustering to reduce tail dependence, and spatiotemporally weighted error term corrections were incorporated into the modelling process for each cell. The modelling results for each return period are projected bilinearly onto a spatial grid with a higher resolution of about 0.0083 degrees for publication. This project is based on analyses of other spatial datasets and should not be used for local or regional applications. Its purpose is to identify areas of high drought risk and highlight regions where more and more accurate research data should be. Due to the generalized statistical approach of the analysis, some areas may be under- or overestimated. Suggested citation: Weller, Daniel & Mann, Holger (2022): Global Drought Hazard. A global raster data set of extreme value analyses of the Standardized Precipitation Evapotranspiration Index via Poisson-Generalized Pareto Point Process modelling. Distributed by The Humanitarian Data Exchange: Institute for International Law of Peace and Armed Conflict.

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Climate and weather · African Center of Meteorological Applications for Development

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Drought (Baseline)

Drought: areas where the Standardized Precipitation Index is below 0%. Pixels with a value below than the specified threshold (0%) were given a value of 1 (YES response) Historical climate data are an ensemble of outputs from CMIP6 earth system models for the time period 1981-2010 **Data publication:** 2022-01-26 **Contact points:** Resource Contact: [IPCC WGI Interactive Atlas](mailto:ipcc-ddc@ifca.unican.es) Metadata Contact: [OCB Environment](mailto:OCB-Environment-List@fao.org) **Resource constraints:** More information on IPCC data license at: https://interactive-atlas.ipcc.ch/license **Online resources:**