BGS Hosted Metadata
Gridded Standardized Precipitation Index (SPI) using gamma distribution with standard period 1961-2010 for Great Britain [SPIgamma61-10]
1km and 5km gridded Standardised Precipitation Index (SPI) data for Great Britain, which is a drought index based on the probability of precipitation for a given accumulation period as defined by McKee et al. (1993). SPI is calculated for different accumulation periods: 1, 3, 6, 12, 18, 24 months. Each of these is in turn calculated for each of the twelve calendar months. Note that values in monthly (and for longer accumulation periods also annual) time series of the data therefore are likely to be autocorrelated. The standard period which was used to fit the gamma distribution is 1961-2010. The dataset covers the period from 1961 to 2012. Full details about this dataset can be found at https://doi.org/10.5285/94c9eaa3-a178-4de4-8905-dbfab03b69a0
Simple
- Date (Publication)
- 2015-04-30
- Citation identifier
- CEH:EIDC: / 1428490171842
- Citation identifier
- https://catalogue.ceh.ac.uk/id/94c9eaa3-a178-4de4-8905-dbfab03b69a0
- Citation identifier
- doi: / 10.5285/94c9eaa3-a178-4de4-8905-dbfab03b69a0
- Other citation details
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Tanguy, M., Hannaford, J., Barker, L., Svensson, C., Kral, F., Fry, M. (2015). Gridded Standardized Precipitation Index (SPI) using gamma distribution with standard period 1961-2010 for Great Britain [SPIgamma61-10]. NERC Environmental Information Data Centre 10.5285/94c9eaa3-a178-4de4-8905-dbfab03b69a0
- Point of contact
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Organisation name Individual name Electronic mail address Role UK Centre for Ecology & Hydrology Tanguy, M.
Point of contact Centre for Ecology & Hydrology Tanguy, M.
Author Centre for Ecology & Hydrology Hannaford, J.
Author Centre for Ecology & Hydrology Barker, L.
Author Centre for Ecology & Hydrology Svensson, C. Author Centre for Ecology & Hydrology Kral, F.
Author Centre for Ecology & Hydrology Fry, M. Author NERC Environmental Information Data Centre Publisher NERC EDS Environmental Information Data Centre Custodian
- Maintenance and update frequency
- Not planned
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GEMET - INSPIRE themes, version 1.0
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Meteorological geographical features
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- Access constraints
- Other restrictions
- Other constraints
- Registration is required to access this data
- Use constraints
- Other restrictions
- Other constraints
- License terms and conditions apply
- Use constraints
- Other restrictions
- Other constraints
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If you reuse this data, you should cite: Tanguy, M., Hannaford, J., Barker, L., Svensson, C., Kral, F., Fry, M. (2015). Gridded Standardized Precipitation Index (SPI) using gamma distribution with standard period 1961-2010 for Great Britain [SPIgamma61-10]. NERC Environmental Information Data Centre https://doi.org/10.5285/94c9eaa3-a178-4de4-8905-dbfab03b69a0
- Spatial representation type
- Grid
- Distance
- 1000 urn:ogc:def:uom:EPSG::9001
- Distance
- 5000 urn:ogc:def:uom:EPSG::9001
- Language
- English
- Character set
- UTF8
- Topic category
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- Climatology, meteorology, atmosphere
- Begin date
- 1961-01-01
- End date
- 2012-12-31
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- Unique resource identifier
- OSGB 1936 / British National Grid
- Distribution format
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Name Version netCDF
4
- Distributor contact
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Organisation name Individual name Electronic mail address Role NERC EDS Environmental Information Data Centre
Distributor
- OnLine resource
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Protocol Linkage Name https://catalogue.ceh.ac.uk/datastore/eidchub/94c9eaa3-a178-4de4-8905-dbfab03b69a0 Download the data
- OnLine resource
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Protocol Linkage Name https://data-package.ceh.ac.uk/sd/94c9eaa3-a178-4de4-8905-dbfab03b69a0.zip Supporting information
- Hierarchy level
- Dataset
- Other
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dataset
Conformance result
- Title
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Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
- Date (Publication)
- 2010-12-08
- Statement
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SPI is calculated as originally defined in [1]. SPI is based on the cumulative probability of a given rainfall amount occurring at a location. The historic rainfall data of the station is fitted to a statistical distribution. For this dataset, the statistical distribution used is the gamma distribution, which has been extensively used and is recommended as a default choice for Europe by [2]. The L-moments method was used to estimate the gamma distribution parameters, as the maximum likehood method was failing to fit a realistic distribution in some isolated cases (more details on the choice of methodology in [3]). To calculate SPI, the R package SCI was used [4], but modified to use L-moments (instead of Maximum Likelihood). The input data used is the monthly rainfall grids from CEH-Gridded Estimates of Areal Rainfall [CEH-GEAR] ([5], [6]) [1] McKee, T. B., Doesken, N. J., Kleist, J. (1993). The Relationship of Drought Frequency and Duration to Time Scales. Eighth Conference on Applied Climatology, 17-22 January 1993, Anaheim, California. [2] Stagge, J. H., Tallaksen, L. M., Gudmundsson, L., Van Loon, A. F. and Stahl, K. (2015), Candidate Distributions for Climatological Drought Indices (SPI and SPEI). Int. J. Climatol. doi: 10.1002/joc.4267 [3] Tanguy et al. (2015), in preparation. [4] Gudmundsson, L. & Stagge, J. H. (2014). Package 'SCI': Standardized Climate Indices such as SPI, SRI or SPEI. Repository CRAN, http://cran.r-project.org/web/packages/SCI/SCI.pdf [5] Tanguy, M., Dixon, H., Prosdocimi, I., Morris, D. G., Keller, V. D. J. (2014). Gridded estimates of daily and monthly areal rainfall for the United Kingdom (1890-2012) [CEH-GEAR]. NERC-Environmental Information Data Centre doi:10.5285/5dc179dc-f692-49ba-9326-a6893a503f6e [6] Keller,V. D. J., Tanguy, M. , Prosdocimi, I. , Terry, J. A. , Hitt, O., Cole, S. J. , Fry, M., Morris, D. G., Dixon, H. (2015) CEH-GEAR: 1km resolution daily and monthly areal rainfall estimates for the UK for hydrological use. Earth Syst. Sci. Data Discuss., 8, 83-112, www.earth-syst-sci-data-discuss.net/8/83/2015/ doi:10.5194/essdd-8-83-2015.
Metadata
- File identifier
- 94c9eaa3-a178-4de4-8905-dbfab03b69a0 XML
- Metadata language
- English
- Character set
- 8859 Part 1
- Hierarchy level
- Dataset
- Hierarchy level name
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dataset
- Date stamp
- 2025-03-21T13:20:44
- Metadata standard name
- UK GEMINI
- Metadata standard version
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2.3
- Metadata author
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Organisation name Individual name Electronic mail address Role NERC EDS Environmental Information Data Centre Point of contact
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