A modular and open source glacier model#

OGGM is a cutting-edge open source modelling framework designed to simulate the past and future mass balance, volume, and geometry of glaciers worldwide.

The model features several glacier evolution models, including an explicit ice dynamics module accounting for glacier geometry and frontal ablation. With an unwavering commitment to using publicly available data for calibration and validation, OGGM is a reliable and readily applicable tool for studying glaciers.

OGGM is also a modular platform that supports novel modelling workflows, encouraging researchers to create unique models and analyses for their research. Our framework is designed to be flexible and adaptable, making it an ideal tool for a wide range of applications in glaciology and related fields.


OGGM v1.6 is a substantial change to v1.5.3. Among other developments, the mass balance calibration has substantially improved. In order to allow easier and faster developments from the community in the future, several variable names have changed and older workflows are not available anymore. We recommend our users to switch to 1.6 as soon as possible, but only if they are at the development stage of a study. Older versions of OGGM will always be available via github and Zenodo, and older documentation pages can be accessed via the interface below.

This webpage is for the software documentation: for general information about the OGGM project and related news, visit oggm.org.

Video presentation#

If you are new to OGGM would like a short introduction, here is a 15’ presentation from April 2020:

Disclaimer: If you don’t have access to youtube from your location, you won’t be able to see this video. Slides available here


Core principles and structure of the OGGM modelling framework.

Using OGGM#

How to use the model, with concrete code examples and links to the tutorials.

Datasets and downloads#

All the things that OGGM has on offer.


Do you want to contribute to the model? This is the right place to start.

Get in touch#

License and citation#

OGGM is available under the open source 3-Clause BSD License.

OGGM is a free software. This implies that you are free to use the model and copy, modify or redistribute its code at your wish, under certain conditions:

  1. When using this software, please acknowledge the original authors of this contribution by using our logo, referring to our website or using an appropriate citation. See Citing OGGM for how to do that.

  2. Redistributions of any substantial portion of the OGGM source code must meet the conditions listed in the OGGM license

  3. Neither OGGM e.V. nor the names of OGGM contributors may be used to endorse or promote products derived from this software without specific prior written permission. This does not mean that you need our written permission to work with OGGM or publish results based on OGGM: it simply means that the OGGM developers are not accountable for what you do with the tool (more info).

See the OGGM license for more information.


Pypi version Supported python versions
GMD Paper Zenodo
Code coverage Linux build status Mass balance cross validation Documentation status Benchmark status
BSD-3-Clause License

See the version history for a list of all contributors.