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Observatoire Midi-Pyrénées |  |
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Observatoire Midi-Pyrénées | |
| HAL: hal-00489503, version 1 |
| DOI: 10.1175/2009bams2818.1 |
| Detailed view |  Export this paper |
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| Bulletin of the American Meteorological Society 91, 5 (2010) 611-624 |
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| Global Chemistry Simulations in the AMMA Multimodel Intercomparison Project |
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| Jason Edward Williams 1Rinus Scheele 1 |
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| (2010) |
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| The authors present results obtained during the chemistry-transport modeling (CTM) component of the African Monsoon Multi-disciplinary Analysis Multimodel Intercomparison Project (AMMA-MIP) using the recently developed L3JRCv2 emission dataset for Af-rica, where emphasis is placed on the summer of 2006. With the use of passive tracers, the authors show that the application of different parameterizations to describe advection, vertical diffusion, and convective mixing in a suite of state-of-the-art global CTMs results in significantly different transport mechanisms westward of the African continent. Moreover, the authors identify that the atmospheric composition over the southern Atlantic is governed by air masses originating from southern Africa for this period, resulting in maximal concentrations around 5°S. Comparisons with ozonesonde measurements at Cotonou (6.2°N, 2.2°E) indicate that the models generally overpredict surface ozone and underpredict ozone in the upper troposphere. Moreover, using recent aircraft measurements, the authors show that the high ozone concentrations that occur around 700 hPa around 5°N are not captured by any of the models, indicating shortcomings in the description of transport, the magnitude and/or location of emissions, or the in situ chemical ozone production by the various chemical mechanisms employed. |
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| 1: | Royal Netherlands Meteorological Institute (KNMI) |
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Royal Netherlands Meteorological Institute |
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| 2: | Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) |
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CNRS : UMR8190 – Université Pierre et Marie Curie [UPMC] - Paris VI – Université de Versailles Saint-Quentin-en-Yvelines – INSU |
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| 3: | Institut Pierre-Simon-Laplace (IPSL) |
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CNRS : FR636 – Institut de recherche pour le développement [IRD] – CEA – CNES – INSU – Université Pierre et Marie Curie [UPMC] - Paris VI – Université de Versailles Saint-Quentin-en-Yvelines – Ecole normale supérieure de Paris - ENS Paris |
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| 4: | Groupe d'étude de l'atmosphère météorologique (CNRM-GAME) |
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CNRS : URA1357 – INSU – Météo France |
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| 5: | Centre for Atmosphere Science |
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University of Cambridge |
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| 6: | Department of Chemistry, University of Cambridge |
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University of Cambridge |
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| 7: | Laboratoire d'aérologie (LA) |
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CNRS : UMR5560 – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III |
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| 8: | Laboratoire de Météorologie Dynamique (LMD) |
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CNRS : UMR8539 – INSU – Université Pierre et Marie Curie [UPMC] - Paris VI – Polytechnique - X – Ecole normale supérieure de Paris - ENS Paris |
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| 9: | Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE) |
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CNRS : UMR8212 – CEA : DSM/LSCE – Université de Versailles Saint-Quentin-en-Yvelines |
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| Subject | : | Physics/Physics/Atmospheric and Oceanic Physics Sciences of the Universe/Earth Sciences/Climatology Environmental Sciences/Global Changes |
| hal-00489503, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00489503 | |
| oai:hal.archives-ouvertes.fr:hal-00489503 | |
| From: Catherine Cardon | |
| Submitted on: Saturday, 5 June 2010 12:02:26 | |
| Updated on: Saturday, 5 June 2010 12:02:26 | |
