An evaluation of the performance of chemistry transport models - Part 2: Detailed comparison with two selected campaigns
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...
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Online Access: | https://doi.org/10.5194/acp-5-107-2005 https://www.atmos-chem-phys.net/5/107/2005/ |
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ftcopernicus:oai:publications.copernicus.org:acp3997 2023-05-15T17:35:30+02:00 An evaluation of the performance of chemistry transport models - Part 2: Detailed comparison with two selected campaigns Brunner, D. Staehelin, J. Rogers, H. L. Köhler, M. O. Pyle, J. A. Hauglustaine, D. A. Jourdain, L. Berntsen, T. K. Gauss, M. Isaksen, I. S. A. Meijer, E. Velthoven, P. Pitari, G. Mancini, E. Grewe, V. Sausen, R. 2018-06-28 application/pdf https://doi.org/10.5194/acp-5-107-2005 https://www.atmos-chem-phys.net/5/107/2005/ eng eng doi:10.5194/acp-5-107-2005 https://www.atmos-chem-phys.net/5/107/2005/ eISSN: 1680-7324 Text 2018 ftcopernicus https://doi.org/10.5194/acp-5-107-2005 2019-12-24T09:59:13Z 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 HO x radicals is in general well represented in the models as inferred directly from the comparison with measured OH and HO 2 and indirectly from the comparison with hydrogen peroxide concentrations. Components of the NO y family such as PAN, HNO 3 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 NO x and NO y 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. Text North Atlantic Copernicus Publications: E-Journals Pacific Atmospheric Chemistry and Physics 5 1 107 129 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
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 HO x radicals is in general well represented in the models as inferred directly from the comparison with measured OH and HO 2 and indirectly from the comparison with hydrogen peroxide concentrations. Components of the NO y family such as PAN, HNO 3 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 NO x and NO y 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. |
format |
Text |
author |
Brunner, D. Staehelin, J. Rogers, H. L. Köhler, M. O. Pyle, J. A. Hauglustaine, D. A. Jourdain, L. Berntsen, T. K. Gauss, M. Isaksen, I. S. A. Meijer, E. Velthoven, P. Pitari, G. Mancini, E. Grewe, V. Sausen, R. |
spellingShingle |
Brunner, D. Staehelin, J. Rogers, H. L. Köhler, M. O. Pyle, J. A. Hauglustaine, D. A. Jourdain, L. Berntsen, T. K. Gauss, M. Isaksen, I. S. A. Meijer, E. Velthoven, P. Pitari, G. Mancini, E. Grewe, V. Sausen, R. An evaluation of the performance of chemistry transport models - Part 2: Detailed comparison with two selected campaigns |
author_facet |
Brunner, D. Staehelin, J. Rogers, H. L. Köhler, M. O. Pyle, J. A. Hauglustaine, D. A. Jourdain, L. Berntsen, T. K. Gauss, M. Isaksen, I. S. A. Meijer, E. Velthoven, P. Pitari, G. Mancini, E. Grewe, V. Sausen, R. |
author_sort |
Brunner, D. |
title |
An evaluation of the performance of chemistry transport models - Part 2: Detailed comparison with two selected campaigns |
title_short |
An evaluation of the performance of chemistry transport models - Part 2: Detailed comparison with two selected campaigns |
title_full |
An evaluation of the performance of chemistry transport models - Part 2: Detailed comparison with two selected campaigns |
title_fullStr |
An evaluation of the performance of chemistry transport models - Part 2: Detailed comparison with two selected campaigns |
title_full_unstemmed |
An evaluation of the performance of chemistry transport models - Part 2: Detailed comparison with two selected campaigns |
title_sort |
evaluation of the performance of chemistry transport models - part 2: detailed comparison with two selected campaigns |
publishDate |
2018 |
url |
https://doi.org/10.5194/acp-5-107-2005 https://www.atmos-chem-phys.net/5/107/2005/ |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-5-107-2005 https://www.atmos-chem-phys.net/5/107/2005/ |
op_doi |
https://doi.org/10.5194/acp-5-107-2005 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
5 |
container_issue |
1 |
container_start_page |
107 |
op_container_end_page |
129 |
_version_ |
1766134688402898944 |