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European Geosciences Union, Atmospheric Chemistry and Physics, 12(6), p. 5475-5493, 2006

DOI: 10.5194/acp-6-5475-2006

European Geosciences Union, Atmospheric Chemistry and Physics Discussions, 5(6), p. 9213-9257

DOI: 10.5194/acpd-6-9213-2006

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Influence of different convection parameterisations in a GCM

Journal article published in 2006 by P. Jöckel ORCID, H. Tost, J. Lelieveld
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

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.