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ECHAM

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ECHAM
NameECHAM
DeveloperMax Planck Institute for Meteorology
First release1980s
Latest release[various versions]
Programming languageFortran
Licenseresearch

ECHAM is a family of atmospheric general circulation models originating from the spectral dynamical core developed at the Max Planck Institute for Meteorology and adapted from the operational global weather prediction model of the Deutscher Wetterdienst. The model suite has been used widely across climate research centers such as the European Centre for Medium-Range Weather Forecasts, National Center for Atmospheric Research, and universities including University of Hamburg and University of Oxford. ECHAM versions have contributed to coordinated assessments and projects including the Intergovernmental Panel on Climate Change, Coupled Model Intercomparison Project, and regional climate downscaling initiatives.

Overview

ECHAM implements a hydrostatic spectral dynamical core on the sphere originally derived from the operational model of the Deutscher Wetterdienst and further developed at the Max Planck Institute for Meteorology. Its architecture supports variable spectral truncations, vertical coordinates, and time-stepping schemes enabling studies across scales used by groups at ETH Zurich, Imperial College London, and Princeton University. The codebase interfaces with radiation schemes used in intercomparison studies with models from Met Office Hadley Centre, GISS, and NOAA Geophysical Fluid Dynamics Laboratory. ECHAM has been employed in climate attribution studies referenced by panels such as the United Nations Framework Convention on Climate Change and assessments by the World Meteorological Organization.

Model Development and Versions

Development milestones map onto collaborations among institutions including the Max Planck Society, German Research Foundation, and European research consortia such as COST actions. Major branches include spectral resolutions used in studies by Swiss Federal Institute of Technology, University of Reading, and Scripps Institution of Oceanography. Sequential releases paralleled community efforts like the Atmospheric Model Intercomparison Project and contributed to protocols in Coupled Model Intercomparison Project phases led by the Program for Climate Model Diagnosis and Intercomparison. Versioning has been documented in inter-institutional workshops attended by researchers from Lamont–Doherty Earth Observatory, Woods Hole Oceanographic Institution, and Lawrence Berkeley National Laboratory.

Physical and Numerical Parameterizations

ECHAM couples dynamical cores with parameterizations maintained and validated by teams at Max Planck Institute for Meteorology and collaborators at University of Leipzig, University of Cologne, and Vrije Universiteit Amsterdam. Radiation schemes have been compared with counterparts from Laboratoire de Météorologie Dynamique, NASA Goddard Institute for Space Studies, and Jet Propulsion Laboratory. Convection, boundary layer, and cloud microphysics parameterizations are benchmarked against findings from field campaigns such as ARM Climate Research Facility, Campaigns over the Amazon Rainforest and coordinated experiments by European Space Agency missions. Numerical methods draw on spectral transform techniques advanced in works associated with Courant Institute, Cambridge University, and California Institute of Technology.

Applications and Research Use

ECHAM has been applied to studies of historical climate variability by researchers at National Oceanography Centre, Centre National de la Recherche Scientifique, and Helmholtz Association. Applications include paleoclimate simulations referenced by teams at Max Planck Institute for Meteorology, University of Bern, and Institute of Geophysics. It appears in multi-model ensembles addressing policy-relevant questions for bodies like the Intergovernmental Panel on Climate Change and European Commission research programs. Regional downscaling chains link ECHAM outputs to regional models used at Met Office Hadley Centre Regional Climate Programme, Kiel Climate Model, and Barcelona Supercomputing Center.

Performance and Evaluation

Model evaluation exercises have been coordinated with centers including the World Climate Research Programme, National Center for Atmospheric Research, and European Centre for Medium-Range Weather Forecasts. Skill assessments compare ECHAM climatologies with observational datasets from European Climate Assessment & Dataset, Global Precipitation Climatology Project, and Satellite Observing Systems operated by NOAA and EUMETSAT. Performance benchmarking uses supercomputing resources at Deutsches Klimarechenzentrum, NERSC, and PRACE centers, with code optimization for architectures developed by Intel, NVIDIA, and Cray Research.

Coupling and Integrated Earth System Modeling

ECHAM has been configured for coupling with ocean components such as models from Max Planck Institute for Meteorology and ocean groups at GEOMAR, Nucleus for European Modeling of the Ocean, and GFDL to create coupled systems that participate in Coupled Model Intercomparison Project ensembles. Integrated Earth system setups link ECHAM atmospheres to land surface schemes developed at MPI-BGC, biogeochemical modules from Potsdam Institute for Climate Impact Research, and ice sheet components advanced at British Antarctic Survey and NASA Jet Propulsion Laboratory. Coupled runs have informed assessments by Intergovernmental Panel on Climate Change and scenario analysis by International Energy Agency.

History and Institutional Development

The lineage of the ECHAM core traces to operational forecasting at Deutscher Wetterdienst and to research efforts at the Max Planck Institute for Meteorology, influenced by computational developments in institutions like Zuse Institute Berlin and collaborative networks involving European Centre for Medium-Range Weather Forecasts and World Meteorological Organization. The model’s evolution reflects contributions from researchers affiliated with University of Hamburg, University of Reading, Swiss Federal Institute of Technology, and numerous national meteorological services. Governance and dissemination have involved organizations including the Max Planck Society, German Research Foundation, and European research funding frameworks such as the Horizon 2020 programme.

Category:Atmospheric models