This data set is only available for a restricted user group, please contact us if you want to access these data.
ECAD is the acronym for European Climate Assessment & Data set, which is a daily, high-resolution data set of in-situ meteorological observations within Europe gridded into geographic projection. The observations comprise surface pressure, 2-m air temperature (mean, minimum, maximum), and precipitation and are from, in the mean time, over 3700 (for temperature) and over 9000 (for precipitation) observation stations.
We offer version 21.0e of the ECAD data set. After the improvement of the estimation of uncertainties by using 100-member ensemble calculations in version v19.0e, the main enhancement in v20.0e was that an additional data set is offered: the surface shortwave radiation flux; unfortunately, in version v21.0e this variable is not yet available.
Last update of this data set at ICDC: June 18 2020.
|2m air temperature (mean)||°C|
|2m air temperature (minimum)||°C|
|2m air temperature (maximum)||°C|
|Surface air pressure at sea level||hPa|
|Surface downwelling shortwave radiation flux||W/m² day||in v21.0e not yet available|
Period and temporal resolution:
- 1950-01-01 (Radiation: 1980-01-01) to 2019-12-31
Coverage and spatial resolution:
- Europe, over land
- Spatial resolution: 0.25° x 0.25°, cartesian grid
- Geographic longitude: -40.375°E to 75.375°E
- Geographic latitude: 25.375°N to 75.375°N
- Dimension: 201 rows x 464 columns
- Altitude: following terrain (except surface pressure)
Every parameter of the ECAD data set comes with a separate uncertainty estimate. The uncertainty originates merely from the interpolation of the in situ observations. Uncertainties are particularly large in areas where the density of observations over space and/or time is low, and/or where strong gradients or differences exist between neighboring stations, e.g. in mountains.
In addition, the surface air pressure data set contains artifacts from the interpolation - possibly from the kriging radius used - which are not associated also with a larger uncertainty. Alo the precipitation data set seems to contain artifacts caused by missing data. It needs to be kept in mind that a precipitation of 0 mm is not associated with an uncertainty - or, in other words, there the uncertainty is 0 mm.
The following links provide you with the list of stations used for the respective parameter:
ECA&D project team
KNMI, De Bilt, The Netherlands
email: eca (at) knmi.nl
ICDC / CEN / University of Hamburg
email: stefan.kern (at) uni-hamburg.de
- Algorithm Theoretical Background Document (ATBD)
- Begert, M., et al., 2008, An Automated Homogenization Procedure: Performance Assessment and Application to a large European Climate Dataset, Meteorologische Zeitschrift, 17-5, 663-672.
- Haylock, M.R., et al., 2008, A European daily high-resolution gridded dataset of surface temperature and precipitation. J. Geophys. Res. - Atmosphere, 113, D20119, doi:10.1029/2008JD10201.
- Hofstra, N., et al., 2009, Testing E-OBS European High Resolution Gridded Dataset of Daily Precipitation and Surface Temperature, J. Geophys. Res. - Atmosphere, 114, D21101.
- Van den Besselaar, E.J.M., et al., 2011, A European Daily High-resolution Observational Gridded Data set of Sea Level Pressure, J. Geophys. Res. - Atmosphere, 116, D11110, doi:10.1029/2010JD015468.
- Cornes, R. C., et al., 2018, An ensemble version of the E-OBS temperature and precipitation data sets. J. Geophys. Res. - Atmosphere, 123, 9391-9409, doi: 10.1029/2017JD028200.
- Navarro, A., et al., 2019, Assessment of IMERG precipitation estimates over Europe. Rem. Sens., 11(21), 2470, doi: 10.3390/rs11212470. [They use ECAD precipitation as an evaluation data set, pointing out a few deficiencies.]
When using the ECAD data set please cite as follows:
Cornes, R. C., van der Schrier, G., van den Besselaar, E. J. M., and Jones, P. D., 2018, An ensemble version of the E-OBS temperature and precipitation data sets. J. Geophys. Res. - Atmosphere, 123, 9391-9409, doi: 10.1029/2017JD028200.