Brown, M.J.; Robinson, E.L.; Kay, A.L; Chapman, R.; Bell, V.A.; Blyth, E.M.

Potential evapotranspiration derived from HadUK-Grid gridded climate observations 1969-2020 (Hydro-PE HadUK-Grid)

https://doi.org/10.5285/470d9bf9-8c82-487c-956e-f15f9d8aac64 Cite this dataset

THIS DATASET HAS BEEN SUPERSEDED. The latest version is Potential evapotranspiration derived from HadUK-Grid 1km gridded climate observations 1969-2021 (Hydro-PE HadUK-Grid)

This data has been superseded due to errors in the data. Intercepted precipitation was not always limited to the total amount of precipitation that fell, and so occasionally reported slightly higher PETI, mostly in the summer months. Also there was an occasional error in interpolation from monthly to daily data affecting both the PET and PETI calculations, mostly in the winter months (e.g. negative sunshine hours). The newer version corrects these errors.

If you need access to this archived version, please contact the EIDC

Gridded potential evapotranspiration calculated from HadUK-Grid gridded observed meteorological data at 1 km resolution over the United Kingdom for the years 1969-2020. This dataset contains two potential evapotranspiration variables: daily total potential evapotranspiration (PET; kg m-2 d-1) and daily total potential evapotranspiration with interception correction (PETI; kg m-2 d-1). The units kg m-2 d-1 are equivalent to mm d-1.

The data are provided in gridded netCDF files. There is one file for each variable, for each calendar month.

These data were generated as part of NERC grant NE/S017380/1 (Hydro-JULES: Next generation land surface and hydrological prediction.)

Publication date: 2022-05-17

Format

NetCDF

Where/When

Study area
Temporal extent: 1969-01-01 to 2020-12-31

Provenance & quality

This dataset was derived from the HadUK-Grid gridded observed meteorological dataset v1.0.3.0 at 1 km resolution over the United Kingdom for the years 1969-2020 (https://catalogue.ceda.ac.uk/uuid/4dc8450d889a491ebb20e724debe2dfb). HadUK-Grid is a gridded dataset derived from observed meteorological station data. The daily total potential evapotranspiration (PET; kg m-2 d-1) was calculated using the Penman-Monteith equation parameterised for a well-watered grass surface. The daily total potential evapotranspiration with interception correction (PETI; kg m-2 d-1), was calculated as PET then a correction added for interception by a grass canopy on days with non-zero precipitation.

The HadUK-Grid meteorological variables used were: daily maximum and minimum air temperature at 1.5 m (°C), daily precipitation (mm d-1), monthly mean water vapour pressure (hPa), monthly mean sea level pressure (hPa), monthly total sunshine hours (hours) and monthly mean wind speed at 10 m (m s-1). Other variables used were the surface elevation (m) and Ångström coefficients a, b and c. A description of the methodology is available in the supporting documentation.