Modélisation du vieillissement chimique de panachés de feux de biomasse boreaux
Biomass burning plays a pivotaI role on atmospheric chemistry by serving as a source of many important trace gases such as reactive compounds (CO, hydrocarbons, organic acids, NH3, NOx) , greenhouse gases (CO2, CH4, N2O), and of course combustion aerosols. This study is principally based on two type...
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Other Authors: | , , , , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | French |
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HAL CCSD
2000
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Online Access: | https://theses.hal.science/tel-00764878 https://theses.hal.science/tel-00764878/document https://theses.hal.science/tel-00764878/file/These-Guerinot-2000.pdf |
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ftunivsavoie:oai:HAL:tel-00764878v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université Savoie Mont Blanc: HAL |
op_collection_id |
ftunivsavoie |
language |
French |
topic |
ammoniaque modélisation chimie atmosphérique panache de feu feu de biomasse régions boréales Canada Alaska Groenland carotte de glace mécanisme chimique chimie gazeuse chimie aqueuse transferts de phase processus hétérogènes phase glace acide formique formiate acide acétique acétate ammoniac [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
ammoniaque modélisation chimie atmosphérique panache de feu feu de biomasse régions boréales Canada Alaska Groenland carotte de glace mécanisme chimique chimie gazeuse chimie aqueuse transferts de phase processus hétérogènes phase glace acide formique formiate acide acétique acétate ammoniac [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Guerinot, Geneviève Modélisation du vieillissement chimique de panachés de feux de biomasse boreaux |
topic_facet |
ammoniaque modélisation chimie atmosphérique panache de feu feu de biomasse régions boréales Canada Alaska Groenland carotte de glace mécanisme chimique chimie gazeuse chimie aqueuse transferts de phase processus hétérogènes phase glace acide formique formiate acide acétique acétate ammoniac [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
Biomass burning plays a pivotaI role on atmospheric chemistry by serving as a source of many important trace gases such as reactive compounds (CO, hydrocarbons, organic acids, NH3, NOx) , greenhouse gases (CO2, CH4, N2O), and of course combustion aerosols. This study is principally based on two types of measurements: (1) -Boreal in-plume composition above Canada (ABLE-3B carnpaign: The Arctic Boundary Layer Expedition)-; (2) -Analyses performed along ice cores coming from Greenland which provide a unique record of precipitation chemistry reflecting the atmospheric composition at the time of deposition. They indicate simultaneous enhancement of formic and acetic acids and the formation of ammonium formate . Such sporadic features were attributed to biomass burning events-. A comparison between (1) and (2) indicates a characteristic chemical evolution during the plume ageing. The main goal of this study is to explain the signature of boreal biomass burning in ice cores, and to discern chemical phenomena that govern the plumes ageing. We used a meteorological model, and developed a box model of gas phase and aqueous phase chemistry: we introduce a pH calculation of the clouds droplets, a new solver, and we update, modify, and complete the chemical mechanism. Our results show that air masses are transported from North America to Greenland on a typical time scale of 5 days, with any cloud event, and a chemical equilibrium is reached rapidly. Above Greenland, chemical species are incorporated in the aqueous phase. Aqueous chemistry has a negligible impact on our results, and the gas-water-ice phase transfer phenomena are mostly responsible for the difference in chemical signature between fire plumes and the ice core records. We explain how our model results were extrapolated to concentrations in ice. We determine important physico-chemical parameters related to the incorporation of chemical species in the ice. Les feux de biomasse ont un impact important sur l'atmosphère car ils émettent de grandes quantités de ... |
author2 |
Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Université Joseph-Fourier - Grenoble I S. Cautenet; Patricia Martinerie |
format |
Doctoral or Postdoctoral Thesis |
author |
Guerinot, Geneviève |
author_facet |
Guerinot, Geneviève |
author_sort |
Guerinot, Geneviève |
title |
Modélisation du vieillissement chimique de panachés de feux de biomasse boreaux |
title_short |
Modélisation du vieillissement chimique de panachés de feux de biomasse boreaux |
title_full |
Modélisation du vieillissement chimique de panachés de feux de biomasse boreaux |
title_fullStr |
Modélisation du vieillissement chimique de panachés de feux de biomasse boreaux |
title_full_unstemmed |
Modélisation du vieillissement chimique de panachés de feux de biomasse boreaux |
title_sort |
modélisation du vieillissement chimique de panachés de feux de biomasse boreaux |
publisher |
HAL CCSD |
publishDate |
2000 |
url |
https://theses.hal.science/tel-00764878 https://theses.hal.science/tel-00764878/document https://theses.hal.science/tel-00764878/file/These-Guerinot-2000.pdf |
genre |
Arctic Greenland Groenland ice core Alaska |
genre_facet |
Arctic Greenland Groenland ice core Alaska |
op_source |
https://theses.hal.science/tel-00764878 Glaciologie. Université Joseph-Fourier - Grenoble I, 2000. Français. ⟨NNT : ⟩ |
op_relation |
tel-00764878 https://theses.hal.science/tel-00764878 https://theses.hal.science/tel-00764878/document https://theses.hal.science/tel-00764878/file/These-Guerinot-2000.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1797579387875360768 |
spelling |
ftunivsavoie:oai:HAL:tel-00764878v1 2024-04-28T08:12:33+00:00 Modélisation du vieillissement chimique de panachés de feux de biomasse boreaux Guerinot, Geneviève Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Université Joseph-Fourier - Grenoble I S. Cautenet; Patricia Martinerie 2000-06-27 https://theses.hal.science/tel-00764878 https://theses.hal.science/tel-00764878/document https://theses.hal.science/tel-00764878/file/These-Guerinot-2000.pdf fr fre HAL CCSD tel-00764878 https://theses.hal.science/tel-00764878 https://theses.hal.science/tel-00764878/document https://theses.hal.science/tel-00764878/file/These-Guerinot-2000.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-00764878 Glaciologie. Université Joseph-Fourier - Grenoble I, 2000. Français. ⟨NNT : ⟩ ammoniaque modélisation chimie atmosphérique panache de feu feu de biomasse régions boréales Canada Alaska Groenland carotte de glace mécanisme chimique chimie gazeuse chimie aqueuse transferts de phase processus hétérogènes phase glace acide formique formiate acide acétique acétate ammoniac [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/doctoralThesis Theses 2000 ftunivsavoie 2024-04-11T00:14:29Z Biomass burning plays a pivotaI role on atmospheric chemistry by serving as a source of many important trace gases such as reactive compounds (CO, hydrocarbons, organic acids, NH3, NOx) , greenhouse gases (CO2, CH4, N2O), and of course combustion aerosols. This study is principally based on two types of measurements: (1) -Boreal in-plume composition above Canada (ABLE-3B carnpaign: The Arctic Boundary Layer Expedition)-; (2) -Analyses performed along ice cores coming from Greenland which provide a unique record of precipitation chemistry reflecting the atmospheric composition at the time of deposition. They indicate simultaneous enhancement of formic and acetic acids and the formation of ammonium formate . Such sporadic features were attributed to biomass burning events-. A comparison between (1) and (2) indicates a characteristic chemical evolution during the plume ageing. The main goal of this study is to explain the signature of boreal biomass burning in ice cores, and to discern chemical phenomena that govern the plumes ageing. We used a meteorological model, and developed a box model of gas phase and aqueous phase chemistry: we introduce a pH calculation of the clouds droplets, a new solver, and we update, modify, and complete the chemical mechanism. Our results show that air masses are transported from North America to Greenland on a typical time scale of 5 days, with any cloud event, and a chemical equilibrium is reached rapidly. Above Greenland, chemical species are incorporated in the aqueous phase. Aqueous chemistry has a negligible impact on our results, and the gas-water-ice phase transfer phenomena are mostly responsible for the difference in chemical signature between fire plumes and the ice core records. We explain how our model results were extrapolated to concentrations in ice. We determine important physico-chemical parameters related to the incorporation of chemical species in the ice. Les feux de biomasse ont un impact important sur l'atmosphère car ils émettent de grandes quantités de ... Doctoral or Postdoctoral Thesis Arctic Greenland Groenland ice core Alaska Université Savoie Mont Blanc: HAL |