ISIMIP3a/b: Updated ISIMIP3a/3b fractional country masks #39


Iliusi Vega del Valle reported on April 26, 2023.
We have updated the ISIMIP3a/3b fractional country masks (

A higher resolution fractional mask was used on 43 territories. For details on the list of territories and new grid resolution, see
Iliusi Vega del Valle commented on April 26, 2023.
Another version of the ISIMIP3a/3b fractional country masks ( will be available very soon. The newer version will further improve small islands' masks. We will let you know as soon as the new data is available.
Iliusi Vega del Valle commented on April 27, 2023.
Version 2.6: New data improve resolution in island states. More information at


Please use the replaced datasets for new simulations or research.

Severity low

Status resolved

all versions affected
Data product
Input Data
Input category
Static geographic information
Geo dataset
Input subcategory
Country masks
Simulation round

Affected datasets

There are 4 datasets affected by this caveat. You can download a complete list of all the datasets, or files affected by this caveat as JSON. Alternatively, can also download a list the files as a flat file suitable for Wget. You can use the search interface to further restrict your query.