Abstract

The KNMI'23 climate scenarios are based on 240 years (8 ensembles of 30 years each) of RACMO (Regional Atmospheric Climate Model) v2.3 data for every horizon/scenario. The data in this set is a user-friendly version of the RACMO putput that was used to calculate the scenario tables. ‘User-friendly’ means that the data is mapped to a regular lat/lon grid, and that the time coordinate corresponds to the nominal period it is used for.

Version 1.0 (https://dataplatform.knmi.nl/dataset/knmi23-user-friendly-racmo-1-0) of the dataset only includes values within the Dutch borders. Version 2.0 also includes values outside the borders. In addition, this version also includes a mask to mask the points outside the Netherlands. This user-friendly dataset is also provided to the public via the data portal. The current version (3.0) is the same as version 2.0 but has four extra variables: psl (sea level pressure), sfcwindmax (daily maximum wind speed), uas (daily mean zonal wind speed), vas (daily mean meridional wind speed). These variables are not bias-corrected because the necessary observational data are not available. Users should be aware of this difference.

Supplemental information

Additional information can be found in the KNMI’23 user report (https://cdn.knmi.nl/system/data_center_publications/files/000/071/901/original/KNMI23_klimaatscenarios_gebruikersrapport_23-03.pdf) as well as on the data portal (https://klimaatscenarios-data.knmi.nl/). Please note that the extra variables (psl, sfcwindmax, uas, vas) are not available on the data portal as they are not bias-corrected.

Data quality notice

Arbitrary 30-year periods may have different numbers of leap years and thus different numbers of days. By shifting the time axis, one day may be lost or missing. In the latter case, the last year has no data for December, 31st.


Metadata

Dataset name knmi23_user_friendly_racmo
Dataset version 3.0
Status completed
Update frequency notPlanned
File formats NetCDF
Spatial representation type grid
License https://creativecommons.org/licenses/by/4.0/
North bound latitude 53.7
East bound longitude 2.9
South bound latitude 50.6
West bound longitude 7.4
Dataset edition 1
Dataset manager Andreas Sterl
Maintainer KNMI Data Services
Publication date 2025-04-30
Reference system identifier EPSG4326
Dataset start time 1991-01-01
Dataset end time 2165-12-31
Identifier urn:xkdc:ds:nl.knmi::knmi23_user_friendly_racmo/3.0/
Lineage statement RACMO v2.3 output, bias-corrected and mapped to a regular geographical lat/lon grid
Purpose Publication of data underlying the KNMI’23 scenarios
Use limitation No use limitations
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