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Dataset

 

UKCP09: Met Office regional land surface climate observations - long term averages for administrative regions and river basins

Update Frequency: Not Planned
Status: Completed
Online Status: ONLINE
Publication State: Published
Publication Date: 2017-08-21
Download Stats: last 12 months

Abstract

This dataset contains a set of reference long term averages for observed climate variables that have been spatially averaged over a set of 14 administrative regions and 23 river basins across the British Isles (see links to maps and lists below). Where possible, reference climatologies for each of the periods 1961-1990, 1971-2000 and 1981-2010 are available for each variable. The availability of a variable for a given reference period was dependant on sufficient data for that variable within the reference period. Each regional value is an average of the 5km x 5km grid cell values that fall within it.

The data were derived from the Met Office gridded land surface climate observations – long term averages at 5km resolution (See related dataset) and are provided as space delimited text files.

The 14 administrative regions used within UKCP09 were:
- East Midlands
- East of England
- East Scotland
- London
- North East England
- North Scotland
- North West England
- Northern Ireland
- South East England
- South West England
- Wales
- West Midlands
- West Scotland
- Yorkshire & The Humber

The 23 river basin regions used within UKCP09 were:
- Anglian
- Argyll
- Clyde
- Dee
- Forth
- Humber
- Neagh Bann
- North East Scotland
- North Eastern Ireland
- North Highland
- North West England
- North Western Ireland
- Northumbria
- Orkney and Shetland
- Severn
- Solway
- South East England
- South West England
- Tay
- Thames
- Tweed
- West Highland
- Western Wales

Citable as:  Met Office (2017): UKCP09: Met Office regional land surface climate observations - long term averages for administrative regions and river basins. Centre for Environmental Data Analysis, date of citation. https://catalogue.ceda.ac.uk/uuid/51132aea5ed0433ca338d32a912e3976
Abbreviation: Not defined
Keywords: UKCP09, Met Office, DEFRA, land surface, climate observations

Details

Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
Access to these data is available to any registered CEDA user. Please Login or Register for an account to gain access.
Use of these data is covered by the following licence: http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data were produced by the Met Office for the UKCP09 service and then prepared for archiving with Centre for Environmental Data Analysis (CEDA).

Data Quality:
For details on data quality checks, grid accuracy etc. please see the linked "UKCP09 Frequently Asked Questions".
File Format:
Data are provided in the original ASCII format used within the UKCP09 project. Please see linked documentation for further details.

Process overview

This dataset was generated by the computation detailed below.
Title UKCP09 gridded land surface climate observations methodology
Abstract The gridded data sets are based on the archive of UK weather observations held at the Met Office. The density of the station network used varies through time, and for different climate variables — for example, for the temperature variables the number of stations rises from about 270 in 1914 to 600 in the mid-1990s, before falling to 450 in 2006. Regression and interpolation are used to generate values on a regular grid from the irregular station network, taking into account factors such as latitude and longitude, altitude and terrain shape, coastal influence, and urban land use. This alleviates the impact of station openings and closures on homogeneity, but the impacts of a changing station network cannot be removed entirely, especially in areas of complex topography or sparse station coverage. The methods used to generate the monthly and annual grids are described in more detail in a paper published in the International Journal of Climatology, vol. 25 (2005), pages 1,041-1,054, which can be downloaded here: Generation of monthly gridded data sets for a range of climatic variables over the UK (PDF, 590 kB). The methods used to generate the daily grids are described in more detail in the report 'The generation of the daily gridded data sets of temperature and rainfall for the UK' (PDF, 2.27 MB). The 5 × 5 km grids of the 1961-1990 baseline climate average available on these webpages are simply calculated by averaging or summing the 30 monthly or annual gridded data sets for each variable. They are not the same as the 1 × 1 km data sets presented on our UK Climate pages. The methods used to generate the 1 × 1 km data sets for 30-year average periods, which were used to normalise the station data prior to the generation of monthly and annual grids, are described in a paper published in the International Journal of Climatology, vol. 25 (2005), pages 1,023-1,039, which can be downloaded here: Development of a new set of long-term averages for the UK (PDF, 1.08 MB) To help users combine the 5 × 5 km baseline data sets with the UK Climate Projections, values of the 1961-1990 baseline climate average have also been generated for the 25 × 25 km grid boxes of the HadRM3 regional climate model and for administrative regions and river basins. Each 25 × 25 km grid box value is an average of the 5 × 5 km grid cell values that fall within it. Averages have been calculated for each month, season and the year as a whole (17 data sets). For the days of frost and days of rain variables the seasonal and annual averages are the total of the individual monthly averages. For the remaining variables the seasonal and annual averages are the mean of the monthly averages (allowing for differences in month length). To facilitate combining the baseline data with the UKCP09 climate projections, the 25 km baseline averages for rainfall have been expressed in units of millimetres per day (rather than total millimetres, as for the 5 km data sets). Each regional value is also an average of the 5 × 5 km grid cell values that fall within it. Monthly averages (12 values) have been calculated for each monthly variable and an annual average has been calculated for each annual variable. As with the 25 km data, the averages for rainfall have been expressed in units of millimetres per day.
Input Description MIDAS land surface station data
Output Description None
Software Reference None
  • long_name: Air Temperature
  • gcmd_url: http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0027
  • gcmd_keyword: Air Temperature
  • names: Air Temperature, http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0027
  • long_name: Atmospheric Temperature
  • gcmd_url: http://vocab.ndg.nerc.ac.uk/term/P131/4/GTER0025
  • gcmd_keyword: Atmospheric Temperature
  • names: Atmospheric Temperature, http://vocab.ndg.nerc.ac.uk/term/P131/4/GTER0025
  • long_name: Cloud Cover
  • names: Cloud Cover
  • long_name: Day Of Snow
  • names: Day Of Snow
  • long_name: Frost
  • gcmd_url: http://vocab.ndg.nerc.ac.uk/term/P041/4/G177
  • gcmd_keyword: EARTH SCIENCE > Atmosphere > Atmospheric Phenomena > Frost
  • names: EARTH SCIENCE > Atmosphere > Atmospheric Phenomena > Frost, http://vocab.ndg.nerc.ac.uk/term/P041/4/G177
  • long_name: Hours Of Sunshine
  • names: Hours Of Sunshine
  • long_name: Maximum Surface Air Temperature
  • names: Maximum Surface Air Temperature
  • long_name: Mean Sea Level Pressure
  • names: Mean Sea Level Pressure
  • long_name: Mean Surface Air Temperature
  • names: Mean Surface Air Temperature
  • long_name: Minimum Surface Air Temperature
  • names: Minimum Surface Air Temperature
  • long_name: Rain
  • gcmd_url: http://vocab.ndg.nerc.ac.uk/term/P041/4/G288
  • gcmd_keyword: EARTH SCIENCE > Atmosphere > Precipitation > Rain
  • names: EARTH SCIENCE > Atmosphere > Precipitation > Rain, http://vocab.ndg.nerc.ac.uk/term/P041/4/G288
  • long_name: Relative Humidity
  • names: Relative Humidity
  • long_name: Snow
  • gcmd_url: http://vocab.ndg.nerc.ac.uk/term/P041/4/G290
  • gcmd_keyword: EARTH SCIENCE > Atmosphere > Precipitation > Snow
  • names: http://vocab.ndg.nerc.ac.uk/term/P041/4/G290, EARTH SCIENCE > Atmosphere > Precipitation > Snow
  • long_name: Snow Lying
  • names: Snow Lying
  • long_name: Sunshine
  • gcmd_url: http://vocab.ndg.nerc.ac.uk/term/P041/4/G217
  • gcmd_keyword: EARTH SCIENCE > Atmosphere > Atmospheric Radiation > Sunshine
  • names: EARTH SCIENCE > Atmosphere > Atmospheric Radiation > Sunshine, http://vocab.ndg.nerc.ac.uk/term/P041/4/G217
  • long_name: Temperature
  • names: Temperature
  • long_name: Vapour Pressure
  • names: Vapour Pressure
  • long_name: Water Vapor
  • gcmd_url: http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0943
  • gcmd_keyword: Water Vapor
  • names: Water Vapor, http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0943
  • long_name: Windspeed
  • names: Windspeed

Co-ordinate Variables

Coverage
Temporal Range
Start time:
1961-01-01T00:00:00
End time:
2010-12-31T23:59:59
Geographic Extent

 
61.1101°
 
-8.5649°
 
4.4195°
 
49.5310°
 
Related parties
Authors (1)