Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content
  • Feedback

    • Global Drought Hazard Frequency and Distribution

    Metadata Updated: December 6, 2023

    The 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 data set 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).

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    References

    https://doi.org/10.7927/H4GQ6VP4
    https://doi.org/10.7927/H4R49NQV
    https://doi.org/10.7927/H4MG7MDV

    Dates

    Metadata Created Date November 12, 2020
    Metadata Updated Date December 6, 2023

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Graphic Preview

    Maps Download Page

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date November 12, 2020
    Metadata Updated Date December 6, 2023
    Publisher SEDAC
    Maintainer
    Identifier C179001770-SEDAC
    Data First Published 2005-12-31
    Language en-US
    Data Last Modified 2005-12-31
    Category NDH, geospatial
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://data.nasa.gov/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Citation Center for Hazards and Risk Research - CHRR - Columbia University, Center for International Earth Science Information Network - CIESIN - Columbia University, and International Research Institute for Climate and Society - IRI - Columbia University. 2005-12-31. Global Drought Hazard Frequency and Distribution. Version 1.00. Palisades, NY. Archived by National Aeronautics and Space Administration, U.S. Government, Center for Hazards and Risk Research (CHRR)/Columbia University. https://doi.org/10.7927/H4VX0DFT. https://doi.org/10.7927/H4VX0DFT.
    Creator Center for Hazards and Risk Research - CHRR - Columbia University, Center for International Earth Science Information Network - CIESIN - Columbia University, and International Research Institute for Climate and Society - IRI - Columbia University
    Graphic Preview Description Maps Download Page
    Graphic Preview File https://sedac.ciesin.columbia.edu/data/set/ndh-drought-hazard-frequency-distribution/maps
    Harvest Object Id 49173f27-8a0b-44c7-b63c-63890ffda465
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.7927/H4VX0DFT
    Metadata Type geospatial
    Old Spatial -180.0 -58.0 180.0 85.0
    Program Code 026:001
    Related Documents https://doi.org/10.7927/H4GQ6VP4, https://doi.org/10.7927/H4R49NQV, https://doi.org/10.7927/H4MG7MDV
    Release Place Palisades, NY
    Source Datajson Identifier True
    Source Hash 821a70d55f21267dc48a4da5dcad99858f15309284fccfaced460bf93e37898b
    Source Schema Version 1.1
    Spatial
    Temporal 1980-01-01T00:00:00Z/2000-12-31T00:00:00Z

    Didn't find what you're looking for? Suggest a dataset here.