Articles | Volume 6, issue 12
Atmos. Chem. Phys., 6, 5475–5493, 2006

Special issue: The Modular Earth Submodel System (MESSy) (ACP/GMD inter-journal...

Atmos. Chem. Phys., 6, 5475–5493, 2006

  06 Dec 2006

06 Dec 2006

Influence of different convection parameterisations in a GCM

H. Tost, P. Jöckel, and J. Lelieveld H. Tost et al.
  • Atmospheric Chemistry Department, Max-Planck Institute of Chemistry, P.O. Box 3060, 55020 Mainz, Germany

Abstract. In global models of the atmosphere convection is parameterised, since the typical scale of this process is smaller than the model resolution. Here we address some of the uncertainties arising from the selection of different algorithms to simulate this process. Four different parameterisations for atmospheric convection, all used in state-of-the-art models, are implemented in the model system ECHAM5/MESSy for a consistent inter-comparison and evaluation against observations. Relatively large differences are found in the simulated precipitation patterns, whereas simulated water vapour columns distributions are quite similar and close to observations. The effects on the hydrological cycle and on the simulated meteorological conditions are discussed.

Final-revised paper