ISIMIP data access

For ISIMIP participants

If you are an active ISIMIP participant (i.e., if you are contributing simulations following the ISIMIP protocol), please log in to the Modellers' Dashboard and see the information provided there.

If you are planning to contribute with simulations to ISIMIP, but do not yet have an account in the Modellers' Dashboard, please follow the instructions to Join ISIMIP.

For external users

Access to the ISIMIP input and output data for external users (i.e. non-participants), is provided via the ISIMIP repository, a service hosted by the PIK, as well as our node of the Earth System Grid Federation (ESGF). Data can be downloaded using the web interface or in bulk using tools like wget.

Note: We are in the process of migrating our data from the ESGF portal to the new ISIMIP repository. At the moment, you can search and download all ISIMIP2 and ISIMIP3 input data, but only a subset of the ISIMIP2a/b output data. Please give it a try, your feedback is important for us!

If you don't find a data set listed within our Input or Output data tables, please write us to and we will help you get access to it.

External users of ISIMIP output data should pay special attention to the ISIMIP terms of use.

You can find some basic notes on how to work with NetCDF files here.

ISIMIP repository

The ISIMIP repository is a service by the Potsdam Institute for Climate Impact Research (PIK). Its user-friendly platform can help you quickly get an overview of the data available and its search function and filters will help you navigate through them. Detailed instructions on accessing data from the ISIMIP repository can be found here.

At the moment, you can search and download input data from it. We are collecting feedback about user experiences, pitfalls and things that should be improved. Please give it a try, your feedback is important for us!

Access the ISIMIP repository here


Most of the ISIMIP simulation and input data is available publicly for download from the ISIMIP Earth System Grid Federation server (ESGF).

Detailed instructions on accessing data from the ESGF can be found here. You will need to create an OpenID using the 'create account' link at the top right of the screen. Once you have an OpenID, you can use the search function to find the data you're looking for.

Access the ESGF server here.


Only in special cases, when you encounter unsolvable problems with accessing the ISIMIP repository or our ESGF server, we can refer you to our specialized rsync service available via PIK, which grants read-only access to some of the input data. If this is your case, please write us to

rsync is an open source file transfer program for Unix systems providing a very fast method for bringing remote files to a local copy. Rsync is preinstalled on most Linux distributions as well as on Mac machines. Windows ports of rsync are available from several internet sites.

Take a look at this page to get instructions on how to work with rsync in general, and two working solutions on a Microsoft Windows machine.

Specific Information for each simulation round


Here you can see how the input data for ISIMIP2b are organised on the DKRZ server (access restricted to active ISIMIP members who contribute simulations following the ISIMIP protocols). Note that if you don't require data over oceans, you can make use of the smaller, 'landonly' climate data files.

Here you can find an overview of the input data available. More detailed information can be found in the ISIMIP2b protocol (tables 1-7) and the input-data table.


Before starting to download the ISIMIP2a input data, please read these important instructions about versioning!

Notes on the folder Structure

  • For ISIMIP2a there is an additional InputData folder EvalData, which contains data sets for model evaluation.
  • The climate input data is divided into HistObs (observational climate input data sets for historic validation runs) and FastTrackGCMs (Fast-Track climate input data for catch-up runs (ISIMIP2a) for sectors not in the ISIMIP Fast Track).

ISIMIP Fast Track

Update from January 2020: All Fast Track data is not available via the ESGF node anymore. Please use the data from ISIMIP2b since they are created on the basis of much improved bias-corrected climate models. If you still need access to the Fast Track data, this is available upon request in very specific cases; please write to

There are two versions of the climate input data from the ISIMIP Fast Track:

  • The first version was used to force impact models in the ISIMIP Fast Track phase and should only be used for the ISIMIP2 catch-up experiments for sectors that were already part of the Fast Track (global water, global biomes, agriculture, vector-borne diseases & coastal systems).
  • For all other purposes, i.e. future runs for new sectors and modeling exercises with no relation to ISIMIP, version 2 published under the ISIMIP2a ESGF project should be used. This corrected and extended version (denoted as ISIe in Hempel et al. 2013) overcomes several limitations in adjusting the daily variability.