Stratospheric ozone chemistry in the Antarctic: what determines the lowest ozone values reached and their recovery?
International audience Balloon-borne observations of ozone from the South Pole Station have been reported to reach ozone mixing ratios below the detection limit of about 10 ppbv at the 70 hPa level by late September. After reaching a minimum, ozone mixing ratios increase to above 1 ppmv on the 70 hP...
Published in: | Atmospheric Chemistry and Physics |
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Main Authors: | , , , , |
Other Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2011
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Online Access: | https://insu.hal.science/insu-03622590 https://insu.hal.science/insu-03622590/document https://insu.hal.science/insu-03622590/file/acp-11-12217-2011.pdf https://doi.org/10.5194/acp-11-12217-2011 |
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openpolar |
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Open Polar |
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Météo-France: HAL |
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ftmeteofrance |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Grooss, J. -U. Brautzsch, K. Pommrich, R. Solomon, S. Müller, R. Stratospheric ozone chemistry in the Antarctic: what determines the lowest ozone values reached and their recovery? |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience Balloon-borne observations of ozone from the South Pole Station have been reported to reach ozone mixing ratios below the detection limit of about 10 ppbv at the 70 hPa level by late September. After reaching a minimum, ozone mixing ratios increase to above 1 ppmv on the 70 hPa level by late December. While the basic mechanisms causing the ozone hole have been known for more than 20 yr, the detailed chemical processes determining how low the local concentration can fall, and how it recovers from the minimum have not been explored so far. Both of these aspects are investigated here by analysing results from the Chemical Lagrangian Model of the Stratosphere (CLaMS). As ozone falls below about 0.5 ppmv, a balance is maintained by gas phase production of both HCl and HOCl followed by heterogeneous reaction between these two compounds in these simulations. Thereafter, a very rapid, irreversible chlorine deactivation into HCl can occur, either when ozone drops to values low enough for gas phase HCl production to exceed chlorine activation processes or when temperatures increase above the polar stratospheric cloud (PSC) threshold. As a consequence, the timing and mixing ratio of the minimum ozone depends sensitively on model parameters, including the ozone initialisation. The subsequent ozone increase between October and December is linked mainly to photochemical ozone production, caused by oxygen photolysis and by the oxidation of carbon monoxide and methane. |
author2 |
Laboratoire d'aérologie (LAERO) Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) Centre national de recherches météorologiques (CNRM) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Grooss, J. -U. Brautzsch, K. Pommrich, R. Solomon, S. Müller, R. |
author_facet |
Grooss, J. -U. Brautzsch, K. Pommrich, R. Solomon, S. Müller, R. |
author_sort |
Grooss, J. -U. |
title |
Stratospheric ozone chemistry in the Antarctic: what determines the lowest ozone values reached and their recovery? |
title_short |
Stratospheric ozone chemistry in the Antarctic: what determines the lowest ozone values reached and their recovery? |
title_full |
Stratospheric ozone chemistry in the Antarctic: what determines the lowest ozone values reached and their recovery? |
title_fullStr |
Stratospheric ozone chemistry in the Antarctic: what determines the lowest ozone values reached and their recovery? |
title_full_unstemmed |
Stratospheric ozone chemistry in the Antarctic: what determines the lowest ozone values reached and their recovery? |
title_sort |
stratospheric ozone chemistry in the antarctic: what determines the lowest ozone values reached and their recovery? |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://insu.hal.science/insu-03622590 https://insu.hal.science/insu-03622590/document https://insu.hal.science/insu-03622590/file/acp-11-12217-2011.pdf https://doi.org/10.5194/acp-11-12217-2011 |
genre |
Antarc* Antarctic South pole South pole |
genre_facet |
Antarc* Antarctic South pole South pole |
op_source |
ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://insu.hal.science/insu-03622590 Atmospheric Chemistry and Physics, 2011, 11, pp.12217-12226. ⟨10.5194/acp-11-12217-2011⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-11-12217-2011 insu-03622590 https://insu.hal.science/insu-03622590 https://insu.hal.science/insu-03622590/document https://insu.hal.science/insu-03622590/file/acp-11-12217-2011.pdf BIBCODE: 2011ACP.1112217G doi:10.5194/acp-11-12217-2011 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/acp-11-12217-2011 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
11 |
container_issue |
23 |
container_start_page |
12217 |
op_container_end_page |
12226 |
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1810289807446769664 |
spelling |
ftmeteofrance:oai:HAL:insu-03622590v1 2024-09-15T17:48:31+00:00 Stratospheric ozone chemistry in the Antarctic: what determines the lowest ozone values reached and their recovery? Grooss, J. -U. Brautzsch, K. Pommrich, R. Solomon, S. Müller, R. Laboratoire d'aérologie (LAERO) Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) Centre national de recherches météorologiques (CNRM) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) 2011 https://insu.hal.science/insu-03622590 https://insu.hal.science/insu-03622590/document https://insu.hal.science/insu-03622590/file/acp-11-12217-2011.pdf https://doi.org/10.5194/acp-11-12217-2011 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-11-12217-2011 insu-03622590 https://insu.hal.science/insu-03622590 https://insu.hal.science/insu-03622590/document https://insu.hal.science/insu-03622590/file/acp-11-12217-2011.pdf BIBCODE: 2011ACP.1112217G doi:10.5194/acp-11-12217-2011 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://insu.hal.science/insu-03622590 Atmospheric Chemistry and Physics, 2011, 11, pp.12217-12226. ⟨10.5194/acp-11-12217-2011⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2011 ftmeteofrance https://doi.org/10.5194/acp-11-12217-2011 2024-06-25T00:10:21Z International audience Balloon-borne observations of ozone from the South Pole Station have been reported to reach ozone mixing ratios below the detection limit of about 10 ppbv at the 70 hPa level by late September. After reaching a minimum, ozone mixing ratios increase to above 1 ppmv on the 70 hPa level by late December. While the basic mechanisms causing the ozone hole have been known for more than 20 yr, the detailed chemical processes determining how low the local concentration can fall, and how it recovers from the minimum have not been explored so far. Both of these aspects are investigated here by analysing results from the Chemical Lagrangian Model of the Stratosphere (CLaMS). As ozone falls below about 0.5 ppmv, a balance is maintained by gas phase production of both HCl and HOCl followed by heterogeneous reaction between these two compounds in these simulations. Thereafter, a very rapid, irreversible chlorine deactivation into HCl can occur, either when ozone drops to values low enough for gas phase HCl production to exceed chlorine activation processes or when temperatures increase above the polar stratospheric cloud (PSC) threshold. As a consequence, the timing and mixing ratio of the minimum ozone depends sensitively on model parameters, including the ozone initialisation. The subsequent ozone increase between October and December is linked mainly to photochemical ozone production, caused by oxygen photolysis and by the oxidation of carbon monoxide and methane. Article in Journal/Newspaper Antarc* Antarctic South pole South pole Météo-France: HAL Atmospheric Chemistry and Physics 11 23 12217 12226 |