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The 1-way on-line coupled atmospheric chemistry model system MECO(n) – Part 3: Meteorological evaluation of the on-line coupled system

Hofmann, Christiane and Kerkweg, Astrid and Wernli, Heini and Jöckel, Patrick (2012) The 1-way on-line coupled atmospheric chemistry model system MECO(n) – Part 3: Meteorological evaluation of the on-line coupled system. Geoscientific Model Development, 5, pp. 129-147. DOI: 10.5194/gmd-5-129-2012.

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Official URL: http://www.geosci-model-dev.net/5/129/2012/

Abstract

Three detailed meteorological case studies are conducted with the global and regional atmospheric chemistry model system ECHAM5/MESSy(→COSMO/MESSy)n, shortly named MECO(n). The aim of this article is to assess the general performance of the on-line coupling of the regional model COSMO to the global model ECHAM5. The cases are characterised by intense weather systems in Central Europe: a cold front passage in March 2010, a convective frontal event in July 2007, and the high impact winter storm "Kyrill" in January 2007. Simulations are performed with the new on-line-coupled model system and compared to classical, off-line COSMO hindcast simulations driven by ECMWF analyses. Precipitation observations from rain gauges and ECMWF analysis fields are used as reference, and both qualitative and quantitative measures are used to characterise the quality of the various simulations. It is shown that, not surprisingly, simulations with a shorter lead time generally produce more accurate simulations. Irrespective of lead time, the accuracy of the on-line and off-line COSMO simulations are comparable for the three cases. This result indicates that the new global and regional model system MECO(n) is able to simulate key mid-latitude weather systems, including cyclones, fronts, and convective precipitation, as accurately as present-day state-of-the-art regional weather prediction models in standard off-line configuration. Therefore, MECO(n) will be applied to simulate atmospheric chemistry exploring the model's full capabilities during meteorologically challenging conditions.

Document Type:Article
Title:The 1-way on-line coupled atmospheric chemistry model system MECO(n) – Part 3: Meteorological evaluation of the on-line coupled system
Authors:
AuthorsInstitution or Email of Authors
Hofmann, Christianehofmach@uni-mainz.de
Kerkweg, Astridkerkweg@uni-mainz.de
Wernli, Heiniheini.wernli@env.ethz.ch
Jöckel, PatrickPatrick.Joeckel@dlr.de
Date:19 January 2012
Journal or Publication Title:Geoscientific Model Development
Refereed publication:Yes
In Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:5
DOI:10.5194/gmd-5-129-2012
Page Range:pp. 129-147
Status:Published
Keywords:global model, regional model, atmospheric model, meteorology, precipitation, nesting, model coupling, COSMO, MESSy, model evaluation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport, Space, Aeronautics
HGF - Program Themes:Transport System, Earth Observation, ATM and Operation
DLR - Research area:Transport, Raumfahrt, Aeronautics
DLR - Program:V VS - Verkehrssystem, R EO - Erdbeobachtung, L AO - Air Traffic Management and Operation
DLR - Research theme (Project):V - Projekt Verkehrsentwicklung und Umwelt, R - Vorhaben Atmosphären- und Klimaforschung, L - Climate, Weather and Environment
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Dynamics
Deposited By: Patrick Jöckel
Deposited On:30 Jan 2012 12:22
Last Modified:12 Dec 2013 21:34

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