The GPCC Drought Index – a new, combined and gridded global drought index
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Abstract
Abstract. The Global Precipitation Climatology Centre Drought Index (GPCC-DI) provides estimations of water supply anomalies with respect to long-term statistics. It is a combination of the Standardized Precipitation Index with adaptations from Deutscher Wetterdienst (SPI-DWD) and the Standardized Precipitation Evapotranspiration Index (SPEI). Precipitation data were taken from the Global Precipitation Climatology Centre (GPCC) and temperature data from NOAA's Climate Prediction Center (CPC). The GPCC-DI is available with several accumulation periods of 1, 3, 6, 9, 12, 24 and 48 months for different applications. It is issued monthly starting in January 2013. Typically, it is released on the 10th day of the following month, depending on the availability of the input data. It is calculated on a regular grid with 1° spatial resolution. All accumulation periods are integrated into one netCDF file for each month. This data set is referenced by the doi:10.5676/DWD_GPCC/DI_M_100 and is available free of charge from the GPCC website ftp://ftp.dwd.de/pub/data/gpcc/html/gpcc_di_doi_download.html.
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In drylands, the land area annually experiencing droughts has already increased by approximately 50% since 1961.
“In drylands, the land area annually experiencing droughts has already increased by approximately 50% since 1961 (69).”
From Restoring Degraded Lands (2021) · cites this paper as [69]
The Introduction defines drought and distinguishes it from aridity, but does not report a trend in the annual area affected by drought in drylands. Searches for the claimed 50% increase since 1961 found no supporting passage in our copy. (LLM, conf=0.75)
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- Authors
- Ziese, M., Schneider, U., Meyer-Christoffer, A., Schamm, K., Vido, J., Finger, P., Bissolli, P., Pietzsch, S., & Becker, A.
- Affiliations
- Deutscher Wetterdienst (DE)
- ORCID
- Venue
- Earth System Science Data
- Publisher
- Copernicus GmbH
- Published
- 2014-08-29
- Volume
- 6
- Issue
- 2
- Pages
- 285-295
- ISSN
- 1866-3508 (ISSN-L)
- 1866-3516
- OpenAlex
- W2126829462
- Cited by
- 66
- References
- 30
- Citations by year
- 2026: 4 · 2025: 6 · 2024: 7 · 2023: 6 · 2022: 10 · 2021: 5 · 2020: 8 · 2019: 6 · 2018: 2 · 2017: 6 · 2016: 6
- FWCI
- 3.31
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Earth system science data (publishedVersion, cc-by)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
- Topics
- Physical Sciences › Environmental Science › Global and Planetary Change › Hydrology and Drought Analysis
- Physical Sciences › Environmental Science › Environmental Engineering › Soil Moisture and Remote Sensing
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Precipitation Measurement and Analysis
- Keywords
- drought indices, Standardized Precipitation Index, Standardized Precipitation Evapotranspiration Index, precipitation anomalies, evapotranspiration, GPCC
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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