Date (Publication)

2015-05-22

Date (Creation)

2015-05-14

Citation identifier

CEH:EIDC: / 1432105852978

Citation identifier

https://catalogue.ceh.ac.uk/id/dfd59438-2170-4472-b810-bab33a83d09f

Citation identifier

doi: / 10.5285/dfd59438-2170-4472-b810-bab33a83d09f

Other citation details

Tanguy, M., Kral, F., Fry, M., Svensson, C., Hannaford, J. (2015). Standardised Precipitation Index time series for Integrated Hydrological Units Groups (1961-2012). NERC Environmental Information Data Centre 10.5285/dfd59438-2170-4472-b810-bab33a83d09f

Point of contact

Organisation name	Individual name	Electronic mail address	Role
UK Centre for Ecology & Hydrology	Tanguy, M.	enquiries@ceh.ac.uk	Point of contact
Centre for Ecology & Hydrology	Tanguy, M.	enquiries@ceh.ac.uk	Author
Centre for Ecology & Hydrology	Kral, F.	enquiries@ceh.ac.uk	Author
Centre for Ecology & Hydrology	Fry, M.	enquiries@ceh.ac.uk	Author
Centre for Ecology & Hydrology	Svensson, C.	enquiries@ceh.ac.uk	Author
Centre for Ecology & Hydrology	Hannaford, J.	enquiries@ceh.ac.uk	Author
NERC Environmental Information Data Centre		info@eidc.ac.uk	Publisher
NERC EDS Environmental Information Data Centre		info@eidc.ac.uk	Custodian

Maintenance and update frequency

Not planned

GEMET - INSPIRE themes, version 1.0

• Meteorological geographical features

Access constraints

Other restrictions

Other constraints

Registration is required to access this data

Use constraints

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Licence terms and conditions apply

Use constraints

Other restrictions

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If you reuse this data, you should cite: Tanguy, M., Kral, F., Fry, M., Svensson, C., Hannaford, J. (2015). Standardised Precipitation Index time series for Integrated Hydrological Units Groups (1961-2012). NERC Environmental Information Data Centre https://doi.org/10.5285/dfd59438-2170-4472-b810-bab33a83d09f

Spatial representation type

Text, table

Distance

1000  urn:ogc:def:uom:EPSG::9001

Language

English

Character set

UTF8

Topic category

• Climatology, meteorology, atmosphere

Begin date

1961-01-01

End date

2012-12-31

Unique resource identifier

OSGB 1936 / British National Grid

Distribution format

Name	Version
Comma-separated values (CSV)

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
NERC EDS Environmental Information Data Centre		info@eidc.ac.uk	Distributor

OnLine resource

Protocol	Linkage	Name
	https://data-package.ceh.ac.uk/data/dfd59438-2170-4472-b810-bab33a83d09f	Download the data

OnLine resource

Protocol	Linkage	Name
	https://data-package.ceh.ac.uk/sd/dfd59438-2170-4472-b810-bab33a83d09f.zip	Supporting information

Hierarchy level

Dataset

Other

dataset

Statement

SPI is calculated as originally defined in McKee et al. [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 Stagge et al. [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 Tanguy et al. [3]). To calculate SPI, the R package SCI was used (Gudmundsson & Stagge [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] (Tanguy et al. [5], Keller et al. [6]) which has been area-averaged over each of the Integrated Hydrological Units (IHU) groups(Kral et al. [7]). [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. https://doi.org/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 https://doi.org/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/ https://doi.org/10.5194/essdd-8-83-2015. [7] Kral, F., Fry, M., Dixon, H. (2015). Integrated Hydrological Units of the United Kingdom: Groups. NERC-Environmental Information Data Centre https://doi.org/10.5285/f1cd5e33-2633-4304-bbc2-b8d34711d902

Metadata

File identifier

dfd59438-2170-4472-b810-bab33a83d09f XML

Metadata language

English

Character set

8859 Part 1

Hierarchy level

Dataset

Hierarchy level name

dataset

Date stamp

2025-04-02T07:54:45

Metadata standard name

UK GEMINI

Metadata standard version

2.3

Metadata author

Organisation name	Individual name	Electronic mail address	Role
NERC EDS Environmental Information Data Centre		info@eidc.ac.uk	Point of contact