Impact of biomass burning on pollutant surface concentrations in megacities of the Gulf of Guinea
In the framework of the Dynamics–Aerosol–Chemistry–Cloud Interactions in West Africa (DACCIWA) project, the tropospheric chemical composition in large cities along the Gulf of Guinea is studied using the Weather and Research Forecast and CHIMERE regional models. Simulations are performed for the...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2018-02-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://www.atmos-chem-phys.net/18/2687/2018/acp-18-2687-2018.pdf |
| _version_ | 1819128775616495616 |
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| author | L. Menut C. Flamant S. Turquety A. Deroubaix P. Chazette R. Meynadier |
| author_facet | L. Menut C. Flamant S. Turquety A. Deroubaix P. Chazette R. Meynadier |
| author_sort | L. Menut |
| collection | DOAJ |
| description | In the framework of the Dynamics–Aerosol–Chemistry–Cloud Interactions in West
Africa (DACCIWA) project, the tropospheric chemical composition in large
cities along the Gulf of Guinea is studied using the Weather and Research
Forecast and CHIMERE regional models. Simulations are performed for the
May–July 2014 period, without and with biomass burning emissions. Model
results are compared to satellite data and surface measurements. Using
numerical tracer release experiments, it is shown that the biomass burning
emissions in Central Africa are impacting the surface aerosol and gaseous
species concentrations in Gulf of Guinea cities such as Lagos (Nigeria) and
Abidjan (Ivory Coast). Depending on the altitude of the injection of these
emissions, the pollutants follow different pathways: directly along the coast
or over land towards the Sahel before being vertically mixed in the
convective boundary layer and transported to the south-west and over the
cities. In July 2014, the maximum increase in surface concentrations due to
fires in Central Africa is ≈ 150 µg m<sup>−3</sup> for CO,
≈ 10 to 20 µg m<sup>−3</sup> for O<sub>3</sub> and
≈ 5 µg m<sup>−3</sup> for PM<sub>10</sub>. The analysis of the
PM<sub>10</sub> chemical composition shows that this increase is mainly related to
an increase in particulate primary and organic matter. |
| first_indexed | 2024-12-22T08:33:11Z |
| format | Article |
| id | doaj.art-9239532f2ef14a649b1a169d0b665db8 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-22T08:33:11Z |
| publishDate | 2018-02-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-9239532f2ef14a649b1a169d0b665db82022-12-21T18:32:26ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242018-02-01182687270710.5194/acp-18-2687-2018Impact of biomass burning on pollutant surface concentrations in megacities of the Gulf of GuineaL. Menut0C. Flamant1S. Turquety2A. Deroubaix3P. Chazette4R. Meynadier5Laboratoire de Météorologie Dynamique, Ecole Polytechnique, IPSL Research University, Ecole Normale Supérieure, Université Paris-Saclay, Sorbonne Universités, UPMC Univ Paris 06, CNRS, Route de Saclay, 91128 Palaiseau, FranceLATMOS/IPSL, Sorbonne Universités, UPMC Univ Paris 06, UVSQ, CNRS, 75252 Paris, FranceLaboratoire de Météorologie Dynamique, Ecole Polytechnique, IPSL Research University, Ecole Normale Supérieure, Université Paris-Saclay, Sorbonne Universités, UPMC Univ Paris 06, CNRS, Route de Saclay, 91128 Palaiseau, FranceLaboratoire de Météorologie Dynamique, Ecole Polytechnique, IPSL Research University, Ecole Normale Supérieure, Université Paris-Saclay, Sorbonne Universités, UPMC Univ Paris 06, CNRS, Route de Saclay, 91128 Palaiseau, FranceLSCE, Unité mixte CEA-CNRS-UVSQ, UMR 8212, 91191 Gif-sur-Yvette, FranceLATMOS/IPSL, Sorbonne Universités, UPMC Univ Paris 06, UVSQ, CNRS, 75252 Paris, FranceIn the framework of the Dynamics–Aerosol–Chemistry–Cloud Interactions in West Africa (DACCIWA) project, the tropospheric chemical composition in large cities along the Gulf of Guinea is studied using the Weather and Research Forecast and CHIMERE regional models. Simulations are performed for the May–July 2014 period, without and with biomass burning emissions. Model results are compared to satellite data and surface measurements. Using numerical tracer release experiments, it is shown that the biomass burning emissions in Central Africa are impacting the surface aerosol and gaseous species concentrations in Gulf of Guinea cities such as Lagos (Nigeria) and Abidjan (Ivory Coast). Depending on the altitude of the injection of these emissions, the pollutants follow different pathways: directly along the coast or over land towards the Sahel before being vertically mixed in the convective boundary layer and transported to the south-west and over the cities. In July 2014, the maximum increase in surface concentrations due to fires in Central Africa is ≈ 150 µg m<sup>−3</sup> for CO, ≈ 10 to 20 µg m<sup>−3</sup> for O<sub>3</sub> and ≈ 5 µg m<sup>−3</sup> for PM<sub>10</sub>. The analysis of the PM<sub>10</sub> chemical composition shows that this increase is mainly related to an increase in particulate primary and organic matter.https://www.atmos-chem-phys.net/18/2687/2018/acp-18-2687-2018.pdf |
| spellingShingle | L. Menut C. Flamant S. Turquety A. Deroubaix P. Chazette R. Meynadier Impact of biomass burning on pollutant surface concentrations in megacities of the Gulf of Guinea Atmospheric Chemistry and Physics |
| title | Impact of biomass burning on pollutant surface concentrations in megacities of the Gulf of Guinea |
| title_full | Impact of biomass burning on pollutant surface concentrations in megacities of the Gulf of Guinea |
| title_fullStr | Impact of biomass burning on pollutant surface concentrations in megacities of the Gulf of Guinea |
| title_full_unstemmed | Impact of biomass burning on pollutant surface concentrations in megacities of the Gulf of Guinea |
| title_short | Impact of biomass burning on pollutant surface concentrations in megacities of the Gulf of Guinea |
| title_sort | impact of biomass burning on pollutant surface concentrations in megacities of the gulf of guinea |
| url | https://www.atmos-chem-phys.net/18/2687/2018/acp-18-2687-2018.pdf |
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