The DOWA dataset contains daily 3D files and 10 year time series. The data used to be stored in KNMI Data Centre (KDC) and a DOWA download manual was provided, but now the data is stored on the KNMI Data Platform (the manual is no longer useful). If you encounter any difficulty with downloading the data please contact firstname.lastname@example.org.
Both the daily 3D and the time series files contain exactly the same data and are in NetCDF, but are organised differently to suit different users:
- Dutch Offshore Wind Atlas - daily files (i.e. spatial representation) at 10-600 meter height of all 2,5 km grid points: here you will find NetCDF-files organised in daily files for the DOWA-domain. You can select a day and download all available information for that day in one go: 24 values (for 00 UTC up and including 23 UTC) for all 5 parameters (Temperature, wind speed and direction, pressure and relative humidity) and 17 levels (10, 20, 40, 60, 80, 100, 120, 140, 150, 160, 180, 200, 220, 250, 300, 500 and 600 m) in one file. Units are included in the files. The set consists of 10 years of 365/366 days. The size of the daily dataset for 2008-2017 is: 217x234 (domain size) x 24x365x10 (hourly output over 10 years) x 17 (levels) x 5 (variables). One daily file is about 245 MB, so all daily files together are 900 GB.
- Dutch Offshore Wind Atlas - time series files from 2008-2017 at 10-600 meter height at individual 2,5 km grid points: the time series files are organised per location (217x234 grid cells) in the DOWA subdomain: you can select a grid cell location and download all available time series for that location in one go (10 years: 2008-2017). So there is only one time series file per grid point and the time series of all available parameters (5) and available levels (17) are in this file.