WATCH forcing data (WFD) - 20th Century LWdown (surface incident longwave radiation) 1901-2001

The WATCH Forcing data is a twentieth century meteorological forcing dataset for land surface and hydrological models. It consists of three/six-hourly states of the weather for global half-degree land grid points. It was generated as part of the EU FP 6 project "WATCH" (WATer and global CHange") which ran from 2007-2011. The data was generated in 2 tranches with slightly different methodology: 1901-1957 and 1958-2001, but generally the dataset can be considered as continuous. More details regarding the generation process can be found in the associated WATCH technical report and paper in J. Hydrometeorology. To understand how the data grid is formed it is necessary to read the attached WFD-land-long-lat-z files either in NetCDF or DAT formats. The data covers land points only and excludes the Antarctica. LWdown or surface incident longwave radiation (also known as downwards long-wave radiation flux ) is the surface incident longwave radiation averaged over the next six hours, measured in W/m2 at 6 hourly resolution and 0.5 x 0.5 degrees spatial resolution.

Publication date: 2011-08-01

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Supporting documentation

Format of the dataset : netCDF

Access and use conditions

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Please note that these data are based on climate reanalysis data, plus a spatial interpolation (from one-degree to half-degree), elevation correction and monthly-correction based on gridded observations. As such the WATCH Forcing data are designed for use in modelling (e.g. hydrological modelling) and for where good meteorological observations are not readily available.

Please reference the use of the WATCH forcing data in any work published using http://journals.ametsoc.org/doi/pdf/10.1175/2011JHM1369.1

Where/When

Study area
Temporal extent
1911-01-01    to    2001-12-31

Supplemental information

Other useful information regarding this dataset:

Weedon, G.P.; Gomes, S.; Viterbo, P.; Shuttleworth, W.J.; Blyth, E.; Osterle, H.; Adam, J.C.; Bellouin, N.; Boucher, O.; Best, M.. 2011 Creation of the WATCH forcing data and its use to assess global and regional reference crop evaporation over land during the twentieth century. Journal of Hydrometeorology, 12 (5). 823-848.
THE WATCH FORCING DATA 1958-2001: A METEOROLOGICAL FORCING DATASET FOR LAND SURFACE- AND HYDROLOGICAL-MODELS. Author names: Weedon, G.P., Gomes, S., Viterbo, P., Osterle, H., Adam, J.C., Bellouin, N., Boucher, O., and Best, M. Date: February 2010

Quality

Lineage
These data were created as part of the EU FP6 project WATCH which was coordinated by NERC-CEH and ran from 2007-2011. The data were generated in two tranches according to time interval. The data from 1958-2001 were based on ECMWF (European Centre for Medium Range Weather Forecasting) "ERA-40" reanalysis data via interpolation, elevation correction and monthly bias correction from gridded observations. The data from 1901-1957 were created via re-ordering of the ERA-40 reanalysis one year at a time. For full details of the process see the WATCH technical report No 22 and Weedon (2011, J. Hydrometeorology).

Other contacts

Point Of Contact
Warnaars, T.
Centre for Ecology & Hydrology
Maclean Building, Benson Lane, Crowmarsh Gifford
Wallingford
Oxfordshire
OX10 8BB
United Kingdom
Custodian
Environmental Information Data Centre

Spatial

Spatial representation type
Raster
Spatial reference system
WGS 84

Keywords

Topic categories
Climatology / Meteorology / Atmosphere
Other keywords
Atmosphere
land surface
CEH Topic
Modelling
Discipline keywords
Hydrology
Land surface modelling
meteorology
INSPIRE Theme
Atmospheric Conditions
Meteorological geographical features
Temporal keywords
6-hourly

Dataset identifiers

CEH:EIDC:#1314892215339
https://catalogue.ceh.ac.uk/id/e5d00d66-dcf5-4b0e-9346-f6205a336385

Metadata

Information maintained by
Environmental Information Data Centre
Last updated
2018-06-07T09:17:00