EMD-Global Wind Data (based on ERA-Interim)

The ERA-Interim dataset is a recent global reanalysis dataset from the The European Centre for Medium-Range Weather Forecasts (ECMWF). The full reanalysis dataset holds a variety of surface parameters for weather conditions as well as ocean-wave and land-surface conditions. Furthermore a number of parameters describing the atmospheric conditions are available. The dataset at EMD covers a small processed subset, with focus on parameters relevant for wind-energy purposes.

Resolution, Coverage and Availability

The model grid available to external data-users is 0.702 degree latitude and 0.703 degree longitude.
It holds 4 daily values in a period from 1979 until present.
Coverage is global.
The ECMWF releases the ERA-Interim data with a time-lag of 2-3 months, so expect approximately a 3 month delay for data to become available inside WindPRO.

Availability

EMD International offers access to the ERA Data set, either through time series in WindPRO, or as a dataset to the MesoMap online service.

Required Modules / Licenses

To access the ERA time series data the following licenses/modules are required in your WindPRO setup:

• Basis
• METEO
• MCP

Downloading of data is unrestricted for licenced users, however a "fair use" policy applies.

Data Processing and Dataset Parameters

EMD International has processed the raw ERA-Interim data by a simple downscaling to the different physical heights between 10 m - 200 m. Currently, the following parameters are available in the downloadable time series in WindPRO.

Table: Overview of EMD Dataset Parameters.

Parameter	Description
time	UTC time stamp
wSpeed.x	Wind speeds [m/s] at different physical levels (x). Heights (x): 10m. 25m, 50m, 75m, 100m, 150m, 200m
wDir.x	Wind directions [Deg] at different physical levels (x). Heights (x): 10m. 25m, 50m, 75m, 100m, 150m, 200m
temp.x	Temperatures [Deg C] at different physical levels (x). Heights (x): 10m. 25m, 50m, 75m, 100m, 150m, 200m
pressure.x	Pressures [hPa] at different physical levels (x). Heights (x): 10m. 25m, 50m, 75m, 100m, 150m, 200m

References

An open-access journal paper is available. This paper by D.P.Dee et al "The ERA-Interim reanalysis: configuration and performance of the data assimilation system" describes the dataset and configurations in more detail. Download your copy in pdf-format here.

External Links

Homepage of ERA-Interim: http://www.ecmwf.int/research/era/do/get/era-interim