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Evaluation of the MOCAGE chemistry transport model during the ICARTT/ITOP experiment

Bousserez, N. and Attié, J. L. and Peuch, V. H. and Michou, M. and Pfister, G. and Edwards, D. and Emmons, L. and Mari, C. and Barret, B. and Arnold, S. R. and Heckel, A. and Richter, A. and Schlager, H. and Lewis, A. and Avery, M. and Browell, E. V. and Hair, J. W. (2007) Evaluation of the MOCAGE chemistry transport model during the ICARTT/ITOP experiment. Journal of Geophysical Research, 112 (D10S42), pp. 1-18. DOI: 10.1029/2006JD007595.

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Intercontinental Transport of Ozone and Precursors (ITOP), part of International Consortium for Atmospheric Research on Transport and Transformation (ICARTT), was a large experimental campaign designed to improve our understanding of the chemical transformations within plumes during long-range transport (LRT) of pollution from North America to Europe. This campaign took place in July and August 2004, when a strong fire season occurred in North America. Burning by-products were transported over large distances, sometimes reaching Europe. A chemical transport model, Modélisation de la Chimie Atmosphérique Grande Echelle (MOCAGE), with a high grid resolution (0.5 x 0.5) over the North Atlantic area and a daily inventory of biomass burning emissions over the United States, has been used to simulate the period. By comparing our results with available aircraft in situ measurements and satellite data (MOPITT CO and SCIAMACHY NO2), we show that MOCAGE is capable of representing the main characteristics of the tropospheric ozone-NOx-hydrocarbon chemistry during the ITOP experiment. In particular, high resolution allows the accurate representation of the pathway of exported pollution over the Atlantic, where plumes were transported preferentially at 6 km altitude. The model overestimates OH mixing ratios up to a factor of 2 in the lower troposphere, which results in a global overestimation of hydrocarbons oxidation by-products (PAN and ketones) and an excess of O3 (30–50 ppbv) in the planetary boundary layer (PBL) over the continental United States. Sensitivity study revealed that lightning NO emissions contributed significantly to the NOx budget in the upper troposphere of northeast America during the summer 2004.

Document Type:Article
Title:Evaluation of the MOCAGE chemistry transport model during the ICARTT/ITOP experiment
AuthorsInstitution or Email of Authors
Bousserez, N.Univ. Paul Sabatier, Toulouse, F
Attié, J. L.Univ. Paul Sabatier, Toulouse, F
Peuch, V. H.Météo France, Toulouse, F
Michou, M.Météo France, Toulouse, F
Pfister, G.NCAR, Boulder, CO, USA
Edwards, D.NCAR, Boulder, CO, USA
Emmons, L.NCAR, Boulder, CO, USA
Mari, C.Univ. Paul Sabatier, Toulouse, F
Barret, B.Univ. Paul Sabatier, Toulouse, F
Arnold, S. R.Univ. of Leeds, Leeds, UK
Heckel, A.Inst. of Environmental Physics, Bremen
Richter, A.Inst. of Environmental Physics, Bremen
Lewis, A.Univ. of York, York, UK
Avery, M.NASA, Hampton, VA, USA
Browell, E. V.NASA, Hampton, VA, USA
Hair, J. W.NASA, Hampton, VA, USA
Journal or Publication Title:Journal of Geophysical Research
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 1-18
Keywords:ozone transport, chemistry transport model, NOx
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 - Air Traffic and Weather (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Jana Freund
Deposited On:27 Jun 2007
Last Modified:20 Oct 2014 14:31

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