Global Drought Hazard Frequency and Distribution

Citation:

Citation Information:

Originator:
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
Publication Date: 2005
Title: Global Drought Hazard Frequency and Distribution
Edition: 1.00
Geospatial Data Presentation Form: raster, map
Publication Information:

Publication Place: Palisades, NY
Publisher: CHRR, Columbia University

Online Linkage: http://www.ldeo.columbia.edu/chrr/research/hotspots/
Larger Work Citation:

Citation Information:

Originator: Dilley, M., R.S. Chen, U. Deichmann, A.L. Lerner-Lam, M. Arnold, J. Agwe, P. Buys, O. Kjekstad, B. Lyon, and G. Yetman
Publication Date: 20050329
Title: Natural Disaster Hotspots: A Global Risk Analysis
Edition: Version 1.0
Series Information:

Series Name: Disaster Risk Management Series
Issue Identification: No. 5

Publication Information:

Publication Place: Washington, D.C.
Publisher: The World Bank

Description:

Abstract:
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).
Purpose: To provide a means of assessing the relative distribution and frequency of global drought hazard.

Time Period of Content:

Time Period Information:

Range of Dates/Times:

Beginning Date: 1980
Ending Date: 2000

Currentness Reference: publication date

Status:

Progress: Complete
Maintenance and Update Frequency: As needed

Spatial Domain:

Bounding Coordinates:

West Bounding Coordinate: -180.000000
East Bounding Coordinate: 180.000000
North Bounding Coordinate: 85.000000
South Bounding Coordinate: -58.000000

Keywords:

Theme:

Theme Keyword Thesaurus: EI Gateway Vocabulary
Theme Keyword: Hazards

Theme:

Theme Keyword Thesaurus: SEDAC Topic
Theme Keyword: Hazard Vulnerability

Theme:

Theme Keyword Thesaurus: Data Granularity
Theme Keyword: Global
Theme Keyword: Continent

Theme:

Theme Keyword Thesaurus: CSA-NBII Biocomplexity
Theme Keyword: Disasters
Theme Keyword: Distribution
Theme Keyword: Droughts
Theme Keyword: Frequency (Time)
Theme Keyword: Hot Spots (Geology)
Theme Keyword: Weather Hazards

Theme:

Theme Keyword Thesaurus: CIESIN Indexing Vocabulary Version 2.1 (GCMD Format)
Theme Keyword: CIESIN > Environmental Protection > Disasters > Disaster Area
Theme Keyword: CIESIN > Environmental Protection > Disasters > Disaster Preparedness
Theme Keyword: CIESIN > Environmental Protection > Disasters > Disaster Prevention
Theme Keyword: CIESIN > Environmental Protection > Disasters > Droughts
Theme Keyword: CIESIN > Environmental Protection > Disasters > Natural Disasters
Theme Keyword: CIESIN > Environmental Protection > Environmental Modeling > Disaster Modeling

Theme:

Theme Keyword Thesaurus: GCMD Parameter Valids
Theme Keyword: EARTH SCIENCE > Atmosphere > Atmospheric Phenomena > Drought
Theme Keyword: EARTH SCIENCE > Atmosphere > Precipitation > Precipitation Anomalies

Theme:

Theme Keyword Thesaurus: General
Theme Keyword: Hazard Frequency
Theme Keyword: Hazard Distribution
Theme Keyword: Hazards
Theme Keyword: Hotspots

Theme:

Theme Keyword Thesaurus: ISO Topic
Theme Keyword: Climatology/Meteorology/Atmosphere

Theme:

Theme Keyword Thesaurus: WDC Theme
Theme Keyword: Climate
Theme Keyword: Conservation
Theme Keyword: Hazards
Theme Keyword: Poverty

Place:

Place Keyword Thesaurus: CIESIN Location Terms, version 2.0
Place Keyword: Region > Equatorial
Place Keyword: Global
Place Keyword: Region > Mid-Latitude
Place Keyword: Region > Polar

Access Constraints: None
Use Constraints:
The Trustees of Columbia University in the City of New York, Center for Hazards and Risk Research (CHRR), and International Research Institute for Climate and Society (IRI) hold the copyright of this dataset. Users are prohibited from any commercial, non-free resale, or redistribution without explicit written permission from the CHRR, CIESIN, and IRI. Users should acknowledge CHRR, CIESIN, and IRI as the source used in the creation of any reports, publications, new datasets, derived products, or services resulting from the use of this dataset. CHRR, CIESIN, and IRI also request reprints of any publications and notification of any redistribution efforts.
Point of Contact:

Contact Information:

Contact Organization Primary:

Contact Organization: Socioeconomic Data and Applications Center (SEDAC) User Services

Contact Address:

Address Type: mailing and physical address
Address: CIESIN, Columbia University, 61 Route 9W, P.O. Box 1000
City: Palisades
State or Province: NY
Postal Code: 10964
Country: USA

Contact Voice Telephone: +1 845-365-8920
Contact Facsimile Telephone: +1 845-365-8922
Contact Electronic Mail Address: ciesin.info@ciesin.columbia.edu

Browse Graphic:

Browse Graphic File Name: http://www.ciesin.columbia.edu/repository/hazards/maps/Drought_Frequency_Distribution.gif
Browse Graphic File Description: Thumbnail Image
Browse Graphic File Type: GIF

Browse Graphic:

Browse Graphic File Name: http://www.ciesin.columbia.edu/repository/hazards/maps/Drought_Frequency_Distribution.jpg
Browse Graphic File Description: Larger Image
Browse Graphic File Type: JPG

Browse Graphic:

Browse Graphic File Name: http://www.ciesin.columbia.edu/repository/hazards/maps/Drought_Frequency_Distribution.pdf
Browse Graphic File Description: Largest Image
Browse Graphic File Type: PDF

Cross Reference:

Citation Information:

Originator:
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/The World Bank
Publication Date: 2005
Title: Global Drought Total Economic Loss Risk Deciles
Edition: 1.00
Geospatial Data Presentation Form: raster, map
Publication Information:

Publication Place: Palisades, NY
Publisher: CHRR, Columbia University

Online Linkage: http://www.ldeo.columbia.edu/chrr/research/hotspots/
Larger Work Citation:

Citation Information:

Originator: Dilley, M., R.S. Chen, U. Deichmann, A.L. Lerner-Lam, M. Arnold, J. Agwe, P. Buys, O. Kjekstad, B. Lyon, and G. Yetman
Publication Date: 20050329
Title: Natural Disaster Hotspots: A Global Risk Analysis
Edition: Version 1.0
Series Information:

Series Name: Disaster Risk Management Series
Issue Identification: No. 5

Publication Information:

Publication Place: Washington, D.C.
Publisher: The World Bank

Cross Reference:

Citation Information:

Originator:
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/The World Bank
Publication Date: 2005
Title: Global Drought Mortality Risks and Distribution
Edition: 1.00
Geospatial Data Presentation Form: raster, map
Publication Information:

Publication Place: Palisades, NY
Publisher: CHRR, Columbia University

Online Linkage: http://www.ldeo.columbia.edu/chrr/research/hotspots/
Larger Work Citation:

Citation Information:

Originator: Dilley, M., R.S. Chen, U. Deichmann, A.L. Lerner-Lam, M. Arnold, J. Agwe, P. Buys, O. Kjekstad, B. Lyon, and G. Yetman
Publication Date: 20050329
Title: Natural Disaster Hotspots: A Global Risk Analysis
Edition: Version 1.0
Series Information:

Series Name: Disaster Risk Management Series
Issue Identification: No. 5

Publication Information:

Publication Place: Washington, D.C.
Publisher: The World Bank

Cross Reference:

Citation Information:

Originator:
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/The World Bank
Publication Date: 2005
Title: Global Drought Proportional Economic Loss Risk Deciles
Edition: 1.00
Geospatial Data Presentation Form: raster, map
Publication Information:

Publication Place: Palisades, NY
Publisher: CHRR, Columbia University

Online Linkage: http://www.ldeo.columbia.edu/chrr/research/hotspots/
Larger Work Citation:

Citation Information:

Originator: Dilley, M., R.S. Chen, U. Deichmann, A.L. Lerner-Lam, M. Arnold, J. Agwe, P. Buys, O. Kjekstad, B. Lyon, and G. Yetman
Publication Date: 20050329
Title: Natural Disaster Hotspots: A Global Risk Analysis
Edition: Version 1.0
Series Information:

Series Name: Disaster Risk Management Series
Issue Identification: No. 5

Publication Information:

Publication Place: Washington, D.C.
Publisher: The World Bank

Lineage:

Source Information:

Source Citation:

Citation Information:

Originator: International Research Institute for Climate Prediction (IRI)
Title: Global WASP Analyses
Online Linkage: http://ingrid.ldeo.columbia.edu/maproom/.Global/.Precipitation/WASP_Indices.html

Source Time Period of Content:

Time Period Information:

Range of Dates/Times:

Beginning Date: 1980
Ending Date: 2000

Source Contribution: Provided means of identifying global drought hazard.

Process Step:

Process Description:
Global Drought Hazard Frequency and Distribution used the Weighted Anomaly of Standardized Precipitation (WASP) developed by IRI, computed on a 2.5 minute grid from monthly average precipitation data for 1980 through 2000. The WASP assesses the precipitation deficit or surplus over a specified number of months, weighted by the magnitude of the seasonal cyclic variation in precipitation. A three-month running average was applied to the precipitation data and the median rainfall for the 21-year period calculated for each grid point. A mask was applied to eliminate grid points where the three-month running average precipitation was less than 1 millimeter per day. This excluded both desert regions and dry seasons from analysis. For the remaining points, a drought event was identified when the magnitude of a monthly precipitation deficit was less than or equal to 50 percent of its long-term median value for three or more consecutive months. The final surface was created by classifiying the number of drought events into deciles, 10 classes of an approximately equal number of grid cells. An additional analysis mask excluded those portions of the land surface where the population density was less than 5 persons per square kilometer and there was no significant agriculture.

Direct Spatial Reference Method: Raster
Raster Object Information:

Raster Object Type: Grid Cell
Row Count: 3432
Column Count: 8640
Vertical Count: 1

Horizontal Coordinate System Definition:

Geographic:

Latitude Resolution: 0.041700
Longitude Resolution: 0.041700
Geographic Coordinate Units: Decimal degrees

Geodetic Model:

Horizontal Datum Name: WGS84
Ellipsoid Name: WGS84
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257224

Detailed Description:

Entity Type:

Entity Type Label: gddrg

Attribute:

Attribute Label: Count
Attribute Definition: Number of grid cells having given value attribute.
Attribute Definition Source: CIESIN

Attribute:

Attribute Label: ObjectID
Attribute Definition: Internal feature number.
Attribute Definition Source: ESRI
Attribute Domain Values:

Unrepresentable Domain: Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute Label: Value
Attribute Definition: Decile ranking of grid cells (10 is highest, most hazardous).
Attribute Definition Source: CIESIN

Distributor:

Contact Information:

Contact Organization Primary:

Contact Organization: Socioeconomic Data and Applications Center (SEDAC) User Services

Contact Address:

Address Type: mailing and physical address
Address: CIESIN, Columbia University, 61 Route 9W, P.O. Box 1000
City: Palisades
State or Province: NY
Postal Code: 10964
Country: USA

Contact Voice Telephone: +1 845-365-8920
Contact Facsimile Telephone: +1 845-365-8922
Contact Electronic Mail Address: ciesin.info@ciesin.columbia.edu

Resource Description: CIESIN_CHRR_NDH_DROUGHT_HFD
Distribution Liability:
CIESIN follows procedures designed to ensure that data disseminated by CIESIN are of reasonable quality. If, despite these procedures, users encounter apparent errors or misstatements in the data, they should contact SEDAC User Services at +1 845-365-8920 or via email at ciesin.info@ciesin.columbia.edu. Neither CIESIN nor NASA verifies or guarantees the accuracy, reliability, or completeness of any data provided. CIESIN provides this data without warranty of any kind whatsoever, either expressed or implied. CIESIN shall not be liable for incidental, consequential, or special damages arising out of the use of any data provided by CIESIN.
Standard Order Process:

Ordering Instructions:
The data are available from the Socioeconomic Data and Applications Center (SEDAC) in American Standard Code for Information Interchange (ASCII) format via FTP at ftp://ftp.ciesin.columbia.edu/pub/hotspots/.
Standard Order Process:

Digital Form:

Digital Transfer Information:

Format Name: ASCII
File Decompression Technique: unzip
Transfer Size: 159.000000

Digital Transfer Option:

Online Option:

Computer Contact Information:

Network Address:

Network Resource Name: ftp://ftp.ciesin.columbia.edu/pub/hotspots/gddrg.zip

Access Instructions: Data accessible via FTP.

Available Time Period:

Time Period Information:

Single Date/Time:

Calendar Date: 2005

Metadata Date: 2005/09/29
Metadata Review Date: 2011/05/04
Metadata Future Review Date: 2012/05/04
Metadata Contact:

Contact Information:

Contact Organization Primary:

Contact Organization: Center for International Earth Science Information Network (CIESIN) Metadata Administration

Contact Address:

Address:
61 Route 9W PO Box 1000

City: Palisades
State or Province: NY
Postal Code: 10964
Country: USA

Contact Voice Telephone: +1 845-365-8988
Contact Facsimile Telephone: +1 845-365-8922
Contact Electronic Mail Address: metadata@ciesin.columbia.edu

Metadata Standard Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998
Metadata Time Convention: local time