Influence of different convection parameterisations in a GCM H. Tost, P. Jöckel, and J. Lelieveld 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
Citation: Tost, H., Jöckel, P., and Lelieveld, J.: Influence of different convection parameterisations in a GCM, Atmos. Chem. Phys., 6, 5475-5493, doi:10.5194/acp-6-5475-2006, 2006.