Modelling study of the impact of deep convection on the utls air composition - Part I: Analysis of ozone precursors
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.5194/acp-6-1567-2006 http://hdl.handle.net/11449/69038 |
Resumo: | The aim of this work is to study the local impact on the upper troposphere/lower stratosphere air composition of an extreme deep convective system. For this purpose, we performed a simulation of a convective cluster composed of many individual deep convective cells that occurred near Bauru (Brazil). The simulation is performed using the 3-D mesoscale model RAMS coupled on-line with a chemistry model. The comparisons with meteorological measurements show that the model produces meteorological fields generally consistent with the observations. The present paper (part I) is devoted to the analysis of the ozone precursors (CO, NO x and non-methane volatile organic compounds) and HO x in the UTLS. The simulation results show that the distribution of CO with altitude is closely related to the upward convective motions and consecutive outflow at the top of the convective cells leading to a bulge of CO between 7 km altitude and the tropopause (around 17km altitude). The model results for CO are consistent with satellite-borne measurements at 700 hPa. The simulation also indicates enhanced amounts of NO x up to 2 ppbv in the 7-17 km altitude layer mainly produced by the lightning associated with the intense convective activity. For insoluble non-methane volatile organic compounds, the convective activity tends to significantly increase their amount in the 7-17km layer by dynamical effects. During daytime in the presence of lightning NO x, this bulge is largely reduced in the upper part of the layer for reactive species (e.g. isoprene, ethene) because of their reactions with OH that is increased on average during daytime. Lightning NO x also impacts on the oxydizing capacity of the upper troposphere by reducing on average HO x, HO 2, H 2O 2 and organic hydroperoxides. During the simulation time, the impact of convection on the air composition of the lower stratosphere is negligible for all ozone precursors although several of the simulated convective cells nearly reach the tropopause. There is no significant transport from the upper troposphere to the lower stratosphere, the isentropic barrier not being crossed by convection. The impact of the increase of ozone precursors and HO x in the upper troposphere on the ozone budget in the LS is discussed in part II of this series of papers. |
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Modelling study of the impact of deep convection on the utls air composition - Part I: Analysis of ozone precursorscarbon monoxideconvectionnitrous oxideozonetropopausevolatile organic compoundBauruBrazilSao Paulo [Brazil]South AmericaThe aim of this work is to study the local impact on the upper troposphere/lower stratosphere air composition of an extreme deep convective system. For this purpose, we performed a simulation of a convective cluster composed of many individual deep convective cells that occurred near Bauru (Brazil). The simulation is performed using the 3-D mesoscale model RAMS coupled on-line with a chemistry model. The comparisons with meteorological measurements show that the model produces meteorological fields generally consistent with the observations. The present paper (part I) is devoted to the analysis of the ozone precursors (CO, NO x and non-methane volatile organic compounds) and HO x in the UTLS. The simulation results show that the distribution of CO with altitude is closely related to the upward convective motions and consecutive outflow at the top of the convective cells leading to a bulge of CO between 7 km altitude and the tropopause (around 17km altitude). The model results for CO are consistent with satellite-borne measurements at 700 hPa. The simulation also indicates enhanced amounts of NO x up to 2 ppbv in the 7-17 km altitude layer mainly produced by the lightning associated with the intense convective activity. For insoluble non-methane volatile organic compounds, the convective activity tends to significantly increase their amount in the 7-17km layer by dynamical effects. During daytime in the presence of lightning NO x, this bulge is largely reduced in the upper part of the layer for reactive species (e.g. isoprene, ethene) because of their reactions with OH that is increased on average during daytime. Lightning NO x also impacts on the oxydizing capacity of the upper troposphere by reducing on average HO x, HO 2, H 2O 2 and organic hydroperoxides. During the simulation time, the impact of convection on the air composition of the lower stratosphere is negligible for all ozone precursors although several of the simulated convective cells nearly reach the tropopause. There is no significant transport from the upper troposphere to the lower stratosphere, the isentropic barrier not being crossed by convection. The impact of the increase of ozone precursors and HO x in the upper troposphere on the ozone budget in the LS is discussed in part II of this series of papers.Laboratoire de Physique et Chimie de l'Environnement CNRS Université d'Orléans, 3A Av. de la Recherche Scientifique, 45071 Orléans cedex 2Instituto de Pesquisas Meteorológicas Universidade Estadual Paulista, CX Postal 281, 17033-360 Bauru, S.P.Laboratoire de Météorologie Physique CNRS-OPGC Université Blaise Pascal, 24 Avenue des Landais, 63 177 Aubière cedexCentro de Previsão de Tempo e Estudos Climàticos, Rodovia Presidente Dutra, km 40, Cachoeira Paulista-SPGroupe de Spectrométrie Moléculaire et Atmosphérique UMR 6089 Bât. 6, case 36, 51687 Reims Cedex 2Instituto de Pesquisas Meteorológicas Universidade Estadual Paulista, CX Postal 281, 17033-360 Bauru, S.P.Université d'OrléansUniversidade Estadual Paulista (Unesp)Université Blaise PascalCentro de Previsão de Tempo e Estudos ClimàticosBât. 6Marécal, V.Rivière, E. D.Held, G. [UNESP]Cautenet, S.Freitas, S.2014-05-27T11:21:57Z2014-05-27T11:21:57Z2006-08-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1567-1584application/pdfhttp://dx.doi.org/10.5194/acp-6-1567-2006Atmospheric Chemistry and Physics, v. 6, n. 6, p. 1567-1584, 2006.1680-73161680-7324http://hdl.handle.net/11449/6903810.5194/acp-6-1567-2006WOS:0002376405000012-s2.0-337469220242-s2.0-33746922024.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAtmospheric Chemistry and Physics5.5093,0323,032info:eu-repo/semantics/openAccess2023-12-25T06:22:07Zoai:repositorio.unesp.br:11449/69038Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-12-25T06:22:07Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Modelling study of the impact of deep convection on the utls air composition - Part I: Analysis of ozone precursors |
title |
Modelling study of the impact of deep convection on the utls air composition - Part I: Analysis of ozone precursors |
spellingShingle |
Modelling study of the impact of deep convection on the utls air composition - Part I: Analysis of ozone precursors Marécal, V. carbon monoxide convection nitrous oxide ozone tropopause volatile organic compound Bauru Brazil Sao Paulo [Brazil] South America |
title_short |
Modelling study of the impact of deep convection on the utls air composition - Part I: Analysis of ozone precursors |
title_full |
Modelling study of the impact of deep convection on the utls air composition - Part I: Analysis of ozone precursors |
title_fullStr |
Modelling study of the impact of deep convection on the utls air composition - Part I: Analysis of ozone precursors |
title_full_unstemmed |
Modelling study of the impact of deep convection on the utls air composition - Part I: Analysis of ozone precursors |
title_sort |
Modelling study of the impact of deep convection on the utls air composition - Part I: Analysis of ozone precursors |
author |
Marécal, V. |
author_facet |
Marécal, V. Rivière, E. D. Held, G. [UNESP] Cautenet, S. Freitas, S. |
author_role |
author |
author2 |
Rivière, E. D. Held, G. [UNESP] Cautenet, S. Freitas, S. |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Université d'Orléans Universidade Estadual Paulista (Unesp) Université Blaise Pascal Centro de Previsão de Tempo e Estudos Climàticos Bât. 6 |
dc.contributor.author.fl_str_mv |
Marécal, V. Rivière, E. D. Held, G. [UNESP] Cautenet, S. Freitas, S. |
dc.subject.por.fl_str_mv |
carbon monoxide convection nitrous oxide ozone tropopause volatile organic compound Bauru Brazil Sao Paulo [Brazil] South America |
topic |
carbon monoxide convection nitrous oxide ozone tropopause volatile organic compound Bauru Brazil Sao Paulo [Brazil] South America |
description |
The aim of this work is to study the local impact on the upper troposphere/lower stratosphere air composition of an extreme deep convective system. For this purpose, we performed a simulation of a convective cluster composed of many individual deep convective cells that occurred near Bauru (Brazil). The simulation is performed using the 3-D mesoscale model RAMS coupled on-line with a chemistry model. The comparisons with meteorological measurements show that the model produces meteorological fields generally consistent with the observations. The present paper (part I) is devoted to the analysis of the ozone precursors (CO, NO x and non-methane volatile organic compounds) and HO x in the UTLS. The simulation results show that the distribution of CO with altitude is closely related to the upward convective motions and consecutive outflow at the top of the convective cells leading to a bulge of CO between 7 km altitude and the tropopause (around 17km altitude). The model results for CO are consistent with satellite-borne measurements at 700 hPa. The simulation also indicates enhanced amounts of NO x up to 2 ppbv in the 7-17 km altitude layer mainly produced by the lightning associated with the intense convective activity. For insoluble non-methane volatile organic compounds, the convective activity tends to significantly increase their amount in the 7-17km layer by dynamical effects. During daytime in the presence of lightning NO x, this bulge is largely reduced in the upper part of the layer for reactive species (e.g. isoprene, ethene) because of their reactions with OH that is increased on average during daytime. Lightning NO x also impacts on the oxydizing capacity of the upper troposphere by reducing on average HO x, HO 2, H 2O 2 and organic hydroperoxides. During the simulation time, the impact of convection on the air composition of the lower stratosphere is negligible for all ozone precursors although several of the simulated convective cells nearly reach the tropopause. There is no significant transport from the upper troposphere to the lower stratosphere, the isentropic barrier not being crossed by convection. The impact of the increase of ozone precursors and HO x in the upper troposphere on the ozone budget in the LS is discussed in part II of this series of papers. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-08-15 2014-05-27T11:21:57Z 2014-05-27T11:21:57Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.5194/acp-6-1567-2006 Atmospheric Chemistry and Physics, v. 6, n. 6, p. 1567-1584, 2006. 1680-7316 1680-7324 http://hdl.handle.net/11449/69038 10.5194/acp-6-1567-2006 WOS:000237640500001 2-s2.0-33746922024 2-s2.0-33746922024.pdf |
url |
http://dx.doi.org/10.5194/acp-6-1567-2006 http://hdl.handle.net/11449/69038 |
identifier_str_mv |
Atmospheric Chemistry and Physics, v. 6, n. 6, p. 1567-1584, 2006. 1680-7316 1680-7324 10.5194/acp-6-1567-2006 WOS:000237640500001 2-s2.0-33746922024 2-s2.0-33746922024.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Atmospheric Chemistry and Physics 5.509 3,032 3,032 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1567-1584 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799965403117518848 |