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The atmospheric general circulation model ECHAM 5. PART I: Model description

MPS-Authors
/persons/resource/persons37308

Roeckner,  Erich
The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;
Climate Modelling, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;

/persons/resource/persons37090

Bäuml,  G.
Climate Processes, MPI for Meteorology, Max Planck Society;

/persons/resource/persons37108

Bonaventura,  L.
The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;

/persons/resource/persons37112

Brokopf,  Renate
The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;
Climate Modelling, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;

/persons/resource/persons37141

Esch,  Monika
The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;
Climate Modelling, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;

/persons/resource/persons37156

Giorgetta,  Marco
The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;
Climate Modelling, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;

/persons/resource/persons37170

Hagemann,  Stefan
The Land in the Earth System, MPI for Meteorology, Max Planck Society;
Terrestrial Hydrology, The Land in the Earth System, MPI for Meteorology, Max Planck Society;

/persons/resource/persons37203

Kirchner,  Ingo
The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;

/persons/resource/persons37214

Kornblueh,  Luis
The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;
Director’s Research Group OES, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;

/persons/resource/persons37254

Manzini,  Elisa
The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;
Middle and Upper Atmosphere, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;

/persons/resource/persons37318

Schlese,  Ulrich
The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;

/persons/resource/persons37326

Schulzweida,  Uwe
The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;
Director’s Research Group OES, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;

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Report-349.pdf
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Citation

Roeckner, E., Bäuml, G., Bonaventura, L., Brokopf, R., Esch, M., Giorgetta, M., et al.(2003). The atmospheric general circulation model ECHAM 5. PART I: Model description.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0012-0144-5
Abstract
A detailed description of the fifth-generation ECHAM model is presented. Compared to the previous version, ECHAM4, a number of substantial changes have been introduced in both the numerics and physics of the model. These include a flux-form semi-Lagrangian transport scheme for positive definite variables like water components and chemical tracers, a new longwave radiation scheme, separate prognostic equations for cloud liquid water and cloud ice, a new cloud microphysical scheme and a prognostic-statistical cloud cover parameterization. The number of spectral intervals is increased in both the longwave and shortwave part of the spectrum. Changes have also been made in the representation of land surface processes, including an implicit coupling between the surface and the atmosphere, and in the representation of orographic drag forces. Also, a new dataset of land surface parameters has been compiled for the new model. On the other hand, horizontal and vertical diffusion, cumulus convection and also the spectral dynamics remain essentially unchanged.