About us

An overview about the work of the community is given mainly for non members or beginners.


People of more than 50 institutions work together in several working groups and a variety of communication ways.
Rules arrange the collaboration.


We use COSMO in CLimate Mode and contribute to the model development.


The main events organized by the community are the yearly Assembly, User Training and the User Seminar.


The wide use of COSMO-CLM is reflected by in the increasing number of publications.


Community members have access to the archive of the events, documents, newletter, etc.



März 2018

Bucchignani, E.; Mercogliano, P.; Panitz, H.-J.; Montesarchio, M.; 2018: Climate change projections for the Middle East - North Africa domain with COSMO-CLM at different spatial resolutions [in press]. Advances in climate change research. doi:10.1016/j.accre.2018.01.004


Nikulin, G.; Lennard, C.; Dosio, A.; Kjellström, E.; Chen, Y.; Hänsler, A.; Kupiainen, M.; Laprise, R.; Mariotti, L.; Fox Maule, C.; van Meijgaard, E.; Panitz, H.-J.; Scinocca, J. F.; Somot, S.; 2018: The effects of 1.5 and 2 degrees of global warming on Africa in the CORDEX ensemble [in press]. Environmental research letters. doi:10.1088/1748-9326/aab1b1



December 2017

Nikulin, G., S. Asharaf, M.E. Magariño, S. Calmanti, R.M. Cardoso, J. Bhend, J. Fernández, M. Dolores Frias, K. Fröhlich, B. Früh, S. Herrera García, R. Manzanas, J.M. Gutiérrez, U. Hansson, M. Kolax, M.A. Liniger, P.M.M. Soares, C. Spirig, R. Tome, K. Wyser (2017): Dynamical and statistical downscaling of a global seasonal hindcast in eastern Africa. Climate Services, doi: https://doi.org/10.1016/j.cliser.2017.11.003


September 2017

Wouters, H., K. De Ridder, L. Poelmans, P. Willems, J. Brouwers, P. Hosseinzadehtalaei, H. Tabari, S. Vanden Broucke, N.P.M. van Lipzig, M. Demuzere (2017): Heat stress increase under climate change twice as large in cities as in rural areas:  A study for a densely populated midlatitude maritime region. Geophys. Res. Lett., 44, 1–11, doi:10.1002/2017GL074889


September 2017

Schär, D., Kröner, N. (2016): Sequential factor separation for the analysis of numerical model simulations. J. Atmospheric Sci., doi.org/10.1175/JAS-D-16-0284.1

Kröner, N., S. Kotlarski, E. Fischer, D. Lüthi, E. Zubler, C. Schär (2017): Separating climate change signals into thermodynamic, lapse-rate and circulation effects: theory and application to the European summer climate. Clim. Dyn, 48, 3425–3440, DOI: 10.1007/s00382-016-3276-3


September 2017

Schultze,M., B. Rockel: Direct and semi-direct effects of aerosol climatologies on long-term climate simulations over Europe. Climate Dynamics, pp 1–24, DOI: 10.1007/s00382-017-3808-5


June 2017

Several new articles have been published:






The CLM-Community is an open international network of scientists, who accepted the CLM-Community agreement in all of its details. Members of the Climate Limited-area Modelling-Community (CLM-Community) are applying and developing the COSMO-CLM or CCLM, which is the COSMO model in CLimate Mode.


The first version of the COSMO-CLM (named CLM) was developed by colleagues from HZG, PIK and BTU Cottbus on the basis of the Local Model (LM) version 3.1 (now COSMO model), originally developed by the German Meteorological Service. The COSMO model is the nonhydrostatic operational weather prediction model applied and further developed by the national weather services joined in the COnsortium for SMall scale MOdeling (COSMO).


In 2005 CLM became the regional Community-Model for the German climate research. This model version has been applied on time scales up to centuries and spatial resolutions between 10 and 50 km in different regions of the world.



model orography

In 2007/08 both CLM and LM developments were unified to get a model version for regional climate modelling (COSMO-CLM) and operational weather forecast  (COSMO). From this time, the idea of a uniform model version for weather and climate became a guiding principle of the model development. 


The unified model version COSMO 5 for weather, climate, and environmental research was released in 2015. An intensive evaluation on a climatological time scale on this version was performed. Since CLM-Community Assembly 2016 the new recommended version of the CLM-Community is the COSMO_5.0_clm6. It comes together with a recommendation for the configurations for the European domain (see figure).


Additional effort is put to further configurations for horizontal model grid widths between 1 and 50 km and other regions of the world.


A comprehensive overview over regional climate modeling (in German) is given in PROMET Volume 99 published in 2017.