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Observations for Model Intercomparisons Project

Search and access to ESGF-published obs4MIPs data is available through this site, however information about the project is out of date.   Current information is available through

a new project website


To get data - Please go to the Search & Download Data box or More search  options links above.
A complete list of dasasets can be viewed via the Satellite Data Products link on the left.
To propose a new dataset for obs4MIPs, please see the How to Contribute link on the left.
Obs4MIPs (Observations for Model Intercomparisons Project) is an activity to make observational products more accessible for climate model intercomparisons and evaluation.   It provides data specifications that are closely aligned with CMIP making it possible to make data available via the same searchable distributed system used to serve and disseminate the rapidly expanding set of  simulations made available for community research.
A wide variety of observationally-based datasets are used for climate model evaluation. Obs4MIPs refers to a limited collection of documented datasets that have been organized according to the Coupled Model Intercomparison Project (CMIP) model output requirements and made available on the Earth System Grid Federation (ESGF).  Most obs4MIPs datasets correspond to a field that is output in one or more of the CMIP experiments. This technical alignment of observational products with climate model output can greatly facilitate model evaluation, development and research. Guidelines have also been developed for obs4MIPs product documentation that is of particular relevance for model evaluation. This effort was initiated with support from NASA and the U.S. Department of Energy (DOE) and has now expanded to include:
1) contributions from a broader community including CFMIP-OBS and products that rely on a number of other agency’s (e.g. ESA, EUMETSAT, NOAA, JAXA) satellites, and
2) guidance and support from the WCRP Data Advisory Council. 
More than 80 documented datasets are currently accessible across 7 ESGF nodes with approximately 100 new contributions projected in 2018 based on the response to the (now closed) Call for Datasets.   To date, obs4MIPs only provides gridded products but protocols are being developed to enable inclusion of in-situ data
To summarize, products currently available via Obs4MIPs are:
  1. Comparable to model output defined as part of CMIP
  2. Open to contributions from all data producers that meet the obs4MIPs requirements
  3. Well documented, with traceability to track product version changes
  4. Served through ESGF (and directly available through this COG).

Questions and comments are encouraged and should be sent to

Last Update: July 18, 2022, 10:35 a.m. by Peter Gleckler
Read News
Obs4MIPs-CMIP6 Planning Meeting Final Report is now available
Go to the left sidebar and click on Planning Meeting Report
Call For Datasets - Nov 2015
The WDAC task team has issued a call for dataset contributions to obs4mIPs. See "Call …
Title: Dataset Call is now closed!
We have been overwhelmed with the response to the obs4MIPs dataset call! The task team …
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