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A GCSS model intercomparison for a tropical squall line observed during TOGA-COARE. II: Intercomparison of single-column models and a cloud-resolving model

2000; Wiley; Volume: 126; Issue: 564 Linguagem: Inglês

10.1256/smsqj.56404

1477-870X

P BECHTOLD, Jean‐Luc Redelsperger, I BEAU, M BLACKBURN, S BRINKOP, JY GRANDPEIX, A GRANT, D GREGORY, F GUICHARD, C HOFF, E IOANNIDOU,

Tropical and Extratropical Cyclones Research

Quarterly Journal of the Royal Meteorological SocietyVolume 126, Issue 564 p. 865-888 Article A GCSS model intercomparison for a tropical squall line observed during toga-coare. II: Intercomparison of single-column models and a cloud-resolving model P. Bechtold, Corresponding Author P. Bechtold [email protected] Observatoire Midi-Pyrénées, FranceLaboratoire d'Aérologie, UMR WS/CNRS 5560, Observatoire Midi-Pyrénées, 14 av Belin, 31400, Toulouse, FranceSearch for more papers by this authorJ.-L. Redelsperger, J.-L. Redelsperger Centre National de Recherche Météomlogiques, FranceSearch for more papers by this authorI. Beau, I. Beau Centre National de Recherche Météomlogiques, FranceSearch for more papers by this authorM. Blackburn, M. Blackburn University of Reading, UKSearch for more papers by this authorS. Brinkop, S. Brinkop Deutsche Zentrum für Luft- und Raumfahrt, GermanySearch for more papers by this authorJ.-Y. Grandper, J.-Y. Grandper Laboratoire de Météomlogie Dymmique, FranceSearch for more papers by this authorA. Grant, A. Grant Hadley Centre for Climate Prediction and Research, UKSearch for more papers by this authorD. Gregory, D. Gregory European Centre for Medium-Range Weather Forecasts, UKSearch for more papers by this authorF. Guichard, F. Guichard Centre National de Recherche Météomlogiques, FranceSearch for more papers by this authorC. How, C. How Centre National de Recherche Météomlogiques, FranceSearch for more papers by this authorE. Ioannidou, E. Ioannidou University of Reading, UKSearch for more papers by this author P. Bechtold, Corresponding Author P. Bechtold [email protected] Observatoire Midi-Pyrénées, FranceLaboratoire d'Aérologie, UMR WS/CNRS 5560, Observatoire Midi-Pyrénées, 14 av Belin, 31400, Toulouse, FranceSearch for more papers by this authorJ.-L. Redelsperger, J.-L. Redelsperger Centre National de Recherche Météomlogiques, FranceSearch for more papers by this authorI. Beau, I. Beau Centre National de Recherche Météomlogiques, FranceSearch for more papers by this authorM. Blackburn, M. Blackburn University of Reading, UKSearch for more papers by this authorS. Brinkop, S. Brinkop Deutsche Zentrum für Luft- und Raumfahrt, GermanySearch for more papers by this authorJ.-Y. Grandper, J.-Y. Grandper Laboratoire de Météomlogie Dymmique, FranceSearch for more papers by this authorA. Grant, A. Grant Hadley Centre for Climate Prediction and Research, UKSearch for more papers by this authorD. Gregory, D. Gregory European Centre for Medium-Range Weather Forecasts, UKSearch for more papers by this authorF. Guichard, F. Guichard Centre National de Recherche Météomlogiques, FranceSearch for more papers by this authorC. How, C. How Centre National de Recherche Météomlogiques, FranceSearch for more papers by this authorE. Ioannidou, E. Ioannidou University of Reading, UKSearch for more papers by this author First published: April 2000 Part A https://doi.org/10.1002/qj.49712656405Citations: 55AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract This paper presents single-column model (SCM) simulations of a tropical squall-line case observed during the Coupled Ocean-Atmosphere Response Experiment of the Tropical Ocean/Global Atmosphere Programme. This case-study was part of an international model intercomparison project organized by Working Group 4 'Precipitating Convective Cloud Systems' of the GEWEX (Global Energy and Water-cycle Experiment) Cloud System Study. Eight SCM groups using different deep-convection parametrizations participated in this project. The SCMs were forced by temperature and moisture tendencies that had been computed from a reference cloud-resolving model (CRM) simulation using open boundary conditions. The comparison of the SCM results with the reference CRM simulation provided insight into the ability of current convection and cloud schemes to represent organized convection. The CRM results enabled a detailed evaluation of the SCMs in terms of the thermodynamic structure and the convective mass flux of the system, the latter being closely related to the surface convective precipitation. It is shown that the SCMs could reproduce reasonably well the time evolution of the surface convective and stratiform precipitation, the convective mass flux, and the thermodynamic structure of the squall-line system. The thermodynamic structure simulated by the SCMs depended on how the models partitioned the precipitation between convective and stratiform. However, structural differences persisted in the thermodynamic profiles simulated by the SCMs and the CRM. These differences could be attributed to the fact that the total mass flux used to compute the SCM forcing differed from the convective mass flux. The SCMs could not adequately represent these organized mesoscale circulations and the microphysicallradiative forcing associated with the stratiform region. This issue is generally known as the 'scale-interaction' problem that can only be properly addressed in fully three-dimensional simulations. 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