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An Evaluation of the Performance of Chemistry Transport Models - Part 2: Detailed Comparison with Two Selected Campaigns

Brunner, D. and Staehelin, J. and Rogers, H. L. and Koehler, M. O. and Pyle, J. A. and Hauglustaine, D. and Jourdain, L. and Berntsen, T. K. and Gauss, M. and Isaksen, I. S. A. and Meijer, E. and Velthoven, P. van and Pitari, G. and Mancini, E. and Grewe, V. and Sausen, R. (2005) An Evaluation of the Performance of Chemistry Transport Models - Part 2: Detailed Comparison with Two Selected Campaigns. Atmospheric Chemistry and Physics, 5, pp. 107-129.

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Official URL: http://www.atmos-chem-phys.org/acp/5/107/

Abstract

This is the second part of a rigorous model evaluation study involving five global Chemistry-Transport and two Chemistry-Climate Models operated by different groups in Europe. Simulated trace gas fields were interpolated to the exact times and positions of the observations to account for the actual weather conditions and hence for the specific histories of the sampled air masses. In this part of the study we focus on a detailed comparison with two selected campaigns, PEM-Tropics A and SONEX, contrasting the clean environment of the tropical Pacific with the more polluted North Atlantic region. The study highlights the different strengths and weaknesses of the models in accurately simulating key processes in the UT/LS region including stratosphere-troposphere-exchange, rapid convective transport, lightning emissions, radical chemistry and ozone production. Model simulated Radon, which was used as an idealized tracer for continental influence, was occasionally much better correlated with measured CO than simulated CO pointing towards deficiencies in the used biomass burning emission fields. The abundance and variability of HOx radicals is in general well represented in the models as inferred directly from the comparison with measured OH and HO<sub>2</sub> and indirectly from the comparison with hydrogen peroxide concentrations. Components of the NOy family such as PAN, HNO<sub>3</sub> and NO were found to compare less favorably. Interestingly, models showing good agreement with observations in the case of PEM-Tropics A often failed in the case of SONEX and vice versa. A better description of NOx and NOy emissions, chemistry and sinks is thought to be key to future model improvements with respect to the representation of chemistry in the UT/LS region.

Document Type:Article
Additional Information:LIDO-Berichtsjahr=2005,
Title:An Evaluation of the Performance of Chemistry Transport Models - Part 2: Detailed Comparison with Two Selected Campaigns
Authors:
AuthorsInstitution or Email of Authors
Brunner, D.ETH Zürich, CH
Staehelin, J.ETH Zürich, CH
Rogers, H. L.Cambridge Univ., UK
Koehler, M. O.Cambridge Univ., UK
Pyle, J. A.Cambridge Univ., UK
Hauglustaine, D.Lab. des Sciences du Climat et de L'Environnement, Gif-sur-Yvette, F
Jourdain, L.Service d'Aéronomie, Paris, F
Berntsen, T. K.Univ. of Oslo, Oslo, N
Gauss, M.Univ. of Oslo, Oslo, N
Isaksen, I. S. A.Univ. of Oslo, Oslo, N
Meijer, E.RNMI, De Bilt, NL
Velthoven, P. vanRNMI, De Bilt, NL
Pitari, G.Univ. L'Aquila, L'Aquila, I
Mancini, E.Univ. L'Aquila, L'Aquila, I
Grewe, V.UNSPECIFIED
Sausen, R.UNSPECIFIED
Date:2005
Journal or Publication Title:Atmospheric Chemistry and Physics
Refereed publication:Yes
In Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:5
Page Range:pp. 107-129
Status:Published
Keywords:model validation, ozone, nitrogen oxides, TRADEOFF
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:L VU - Air Traffic and Environment (old)
DLR - Research area:Aeronautics
DLR - Program:L VU - Air Traffic and Environment
DLR - Research theme (Project):L - Wake Vortices (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Dynamics
Deposited By: Ute Löb
Deposited On:17 Sep 2007
Last Modified:11 Nov 2014 21:55

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