5e1792a0-ae95-4e77-bccd-2fb456112cc1
English
ISO/IEC 8859-1 (also known as Latin 1)
dataset
dataset
Environmental Information Data Centre
Lancaster Environment Centre, Library Avenue, Bailrigg
Lancaster
LA1 4AP
UK
info@eidc.ac.uk
pointOfContact
2021-06-25T18:43:38
UK GEMINI
2.3
OSGB 1936 / British National Grid
Standardised Precipitation Index time series for Integrated Hydrological Units Hydrometric Areas (1961-2012)
2015-05-22
publication
2015-05-14
creation
1431704829276
CEH:EIDC:
https://catalogue.ceh.ac.uk/id/5e1792a0-ae95-4e77-bccd-2fb456112cc1
10.5285/5e1792a0-ae95-4e77-bccd-2fb456112cc1
doi:
Tanguy, M., Kral., F., Fry, M., Svensson, C., Hannaford, J. (2015). Standardised Precipitation Index time series for Integrated Hydrological Units Hydrometric Areas (1961-2012). NERC Environmental Information Data Centre 10.5285/5e1792a0-ae95-4e77-bccd-2fb456112cc1
Standardised Precipitation Index (SPI) data for Integrated Hydrological Units (IHU) Hydrometric Areas (Kral et al. [1]). SPI is a drought index based on the probability of precipitation for a given accumulation period as defined by McKee et al. [2]. 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. [1] Kral, F., Fry, M., Dixon, H. (2015). Integrated Hydrological Units of the United Kingdom: Hydrometric Areas without Coastline. NERC-Environmental Information Data Centre doi:10.5285/3a4e94fc-4c68-47eb-a217-adee2a6b02b3 [2] 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. Full details about this dataset can be found at https://doi.org/10.5285/5e1792a0-ae95-4e77-bccd-2fb456112cc1
Dr Maliko Tanguy
UK Centre for Ecology & Hydrology
enquiries@ceh.ac.uk
pointOfContact
Dr Maliko Tanguy
Centre for Ecology & Hydrology
enquiries@ceh.ac.uk
originator
Tanguy, M.
Centre for Ecology & Hydrology
enquiries@ceh.ac.uk
author
Kral., F.
Centre for Ecology & Hydrology
enquiries@ceh.ac.uk
author
Fry, M.
Centre for Ecology & Hydrology
enquiries@ceh.ac.uk
author
Svensson, C.
Centre for Ecology & Hydrology
enquiries@ceh.ac.uk
author
Hannaford, J.
Centre for Ecology & Hydrology
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
notPlanned
Integrated Hydrological Units
IHU
SPI
indicator
drought
rainfall extremes
otherRestrictions
no limitations
otherRestrictions
Licence terms and conditions apply
otherRestrictions
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 Hydrometric Areas (1961-2012). NERC Environmental Information Data Centre https://doi.org/10.5285/5e1792a0-ae95-4e77-bccd-2fb456112cc1
textTable
English
utf8
climatologyMeteorologyAtmosphere
1961-01-01
2012-12-31
-7.557
3.554
49.766
61.026
Comma-separated values (CSV)
NERC EDS Environmental Information Data Centre
info@eidc.ac.uk
distributor
https://data-package.ceh.ac.uk/data/5e1792a0-ae95-4e77-bccd-2fb456112cc1
Download the data
Download a copy of this data
download
https://data-package.ceh.ac.uk/sd/5e1792a0-ae95-4e77-bccd-2fb456112cc1.zip
Supporting information
Supporting information available to assist in re-use of this dataset.
information
dataset
dataset
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
2010-12-08
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) Hydrometric Areas (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. 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. [7] Kral, F., Fry, M., Dixon, H. (2015). Integrated Hydrological Units of the United Kingdom: Hydrometric Areas without Coastline. NERC-Environmental Information Data Centre doi:10.5285/3a4e94fc-4c68-47eb-a217-adee2a6b02b3