A major event of Antarctic ozone hole influence in southern Brazil in October 2016: an analysis of tropospheric and stratospheric dynamics
International audience The Antarctic ozone hole is a cyclical phenomenon that occurs during the austral spring where there is a large decrease in ozone content in the Antarctic region. Ozone-poor air mass can be released and leave through the Antarctic ozone hole, thus reaching midlatitude regions....
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ftunivreunion:oai:HAL:hal-01753371v1 2024-04-14T08:01:16+00:00 A major event of Antarctic ozone hole influence in southern Brazil in October 2016: an analysis of tropospheric and stratospheric dynamics Dornelles Bittencourt, Gabriela Bresciani, Caroline Pinheiro, Damaris Valentin Bageston, José Schuch, Nelson, Jorge Bencherif, Hassan Paes Leme, Neusa Vaz Peres, Lucas Universidade Federal de Santa Maria = Federal University of Santa Maria Santa Maria, RS, Brazil (UFSM) National Institute for Space Research Sao José dos Campos = Instituto Nacional de Pesquisas Espaciais (INPE) Laboratoire de l'Atmosphère et des Cyclones (LACy) Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS)-Météo-France Instituto Nacional de Pesquisas Espaciais (INPE) Ministério da Ciência, Tecnologia e Inovação Federal University of Santa Maria, Brazil Federal University of Sanat Maria 2018 https://hal.univ-reunion.fr/hal-01753371 https://hal.univ-reunion.fr/hal-01753371/document https://hal.univ-reunion.fr/hal-01753371/file/Bittencourt%20et%20al,%20ANGEO%202018.pdf https://doi.org/10.5194/angeo-36-415-2018 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/angeo-36-415-2018 hal-01753371 https://hal.univ-reunion.fr/hal-01753371 https://hal.univ-reunion.fr/hal-01753371/document https://hal.univ-reunion.fr/hal-01753371/file/Bittencourt%20et%20al,%20ANGEO%202018.pdf doi:10.5194/angeo-36-415-2018 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.univ-reunion.fr/hal-01753371 Annales Geophysicae, 2018, 36 (2), pp.415 - 424. ⟨10.5194/angeo-36-415-2018⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2018 ftunivreunion https://doi.org/10.5194/angeo-36-415-2018 2024-03-21T16:25:17Z International audience The Antarctic ozone hole is a cyclical phenomenon that occurs during the austral spring where there is a large decrease in ozone content in the Antarctic region. Ozone-poor air mass can be released and leave through the Antarctic ozone hole, thus reaching midlatitude regions. This phenomenon is known as the secondary effect of the Antarctic ozone hole. The objective of this study is to show how tropospheric and stratospheric dynamics behaved during the occurrence of this event. The ozone-poor air mass began to operate in the region on 20 October 2016. A reduction of ozone content of approximately 23 % was observed in relation to the climatology average recorded between 1992 and 2016. The same air mass persisted over the region and a drop of 19.8 % ozone content was observed on 21 October. Evidence of the 2016 event occurred through daily mean measurements of the total ozone column made with a surface instrument (Brewer MkIII no. 167 Spectrophotometer) located at the Southern Space Observatory (29.42 • S, 53.87 • W) in São Martinho da Serra, Rio Grande do Sul. Tropospheric dynamic analysis showed a post-frontal high pressure system on 20 and 21 October 2016, with pressure levels at sea level and thickness between 1000 and 500 hPa. Horizontal wind cuts at 250 hPa and omega values at 500 hPa revealed the presence of subtropical jet streams. When these streams were allied with positive omega values at 500 hPa and a high pressure system in southern Brazil and Uruguay, the advance of the ozone-poor air mass that caused intense reductions in total ozone content could be explained. Article in Journal/Newspaper Antarc* Antarctic Université de la Réunion: HAL Antarctic Austral The Antarctic Uruguay Annales Geophysicae 36 2 415 424 |
institution |
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Université de la Réunion: HAL |
op_collection_id |
ftunivreunion |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Dornelles Bittencourt, Gabriela Bresciani, Caroline Pinheiro, Damaris Valentin Bageston, José Schuch, Nelson, Jorge Bencherif, Hassan Paes Leme, Neusa Vaz Peres, Lucas A major event of Antarctic ozone hole influence in southern Brazil in October 2016: an analysis of tropospheric and stratospheric dynamics |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience The Antarctic ozone hole is a cyclical phenomenon that occurs during the austral spring where there is a large decrease in ozone content in the Antarctic region. Ozone-poor air mass can be released and leave through the Antarctic ozone hole, thus reaching midlatitude regions. This phenomenon is known as the secondary effect of the Antarctic ozone hole. The objective of this study is to show how tropospheric and stratospheric dynamics behaved during the occurrence of this event. The ozone-poor air mass began to operate in the region on 20 October 2016. A reduction of ozone content of approximately 23 % was observed in relation to the climatology average recorded between 1992 and 2016. The same air mass persisted over the region and a drop of 19.8 % ozone content was observed on 21 October. Evidence of the 2016 event occurred through daily mean measurements of the total ozone column made with a surface instrument (Brewer MkIII no. 167 Spectrophotometer) located at the Southern Space Observatory (29.42 • S, 53.87 • W) in São Martinho da Serra, Rio Grande do Sul. Tropospheric dynamic analysis showed a post-frontal high pressure system on 20 and 21 October 2016, with pressure levels at sea level and thickness between 1000 and 500 hPa. Horizontal wind cuts at 250 hPa and omega values at 500 hPa revealed the presence of subtropical jet streams. When these streams were allied with positive omega values at 500 hPa and a high pressure system in southern Brazil and Uruguay, the advance of the ozone-poor air mass that caused intense reductions in total ozone content could be explained. |
author2 |
Universidade Federal de Santa Maria = Federal University of Santa Maria Santa Maria, RS, Brazil (UFSM) National Institute for Space Research Sao José dos Campos = Instituto Nacional de Pesquisas Espaciais (INPE) Laboratoire de l'Atmosphère et des Cyclones (LACy) Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS)-Météo-France Instituto Nacional de Pesquisas Espaciais (INPE) Ministério da Ciência, Tecnologia e Inovação Federal University of Santa Maria, Brazil Federal University of Sanat Maria |
format |
Article in Journal/Newspaper |
author |
Dornelles Bittencourt, Gabriela Bresciani, Caroline Pinheiro, Damaris Valentin Bageston, José Schuch, Nelson, Jorge Bencherif, Hassan Paes Leme, Neusa Vaz Peres, Lucas |
author_facet |
Dornelles Bittencourt, Gabriela Bresciani, Caroline Pinheiro, Damaris Valentin Bageston, José Schuch, Nelson, Jorge Bencherif, Hassan Paes Leme, Neusa Vaz Peres, Lucas |
author_sort |
Dornelles Bittencourt, Gabriela |
title |
A major event of Antarctic ozone hole influence in southern Brazil in October 2016: an analysis of tropospheric and stratospheric dynamics |
title_short |
A major event of Antarctic ozone hole influence in southern Brazil in October 2016: an analysis of tropospheric and stratospheric dynamics |
title_full |
A major event of Antarctic ozone hole influence in southern Brazil in October 2016: an analysis of tropospheric and stratospheric dynamics |
title_fullStr |
A major event of Antarctic ozone hole influence in southern Brazil in October 2016: an analysis of tropospheric and stratospheric dynamics |
title_full_unstemmed |
A major event of Antarctic ozone hole influence in southern Brazil in October 2016: an analysis of tropospheric and stratospheric dynamics |
title_sort |
major event of antarctic ozone hole influence in southern brazil in october 2016: an analysis of tropospheric and stratospheric dynamics |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.univ-reunion.fr/hal-01753371 https://hal.univ-reunion.fr/hal-01753371/document https://hal.univ-reunion.fr/hal-01753371/file/Bittencourt%20et%20al,%20ANGEO%202018.pdf https://doi.org/10.5194/angeo-36-415-2018 |
geographic |
Antarctic Austral The Antarctic Uruguay |
geographic_facet |
Antarctic Austral The Antarctic Uruguay |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.univ-reunion.fr/hal-01753371 Annales Geophysicae, 2018, 36 (2), pp.415 - 424. ⟨10.5194/angeo-36-415-2018⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/angeo-36-415-2018 hal-01753371 https://hal.univ-reunion.fr/hal-01753371 https://hal.univ-reunion.fr/hal-01753371/document https://hal.univ-reunion.fr/hal-01753371/file/Bittencourt%20et%20al,%20ANGEO%202018.pdf doi:10.5194/angeo-36-415-2018 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/angeo-36-415-2018 |
container_title |
Annales Geophysicae |
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36 |
container_issue |
2 |
container_start_page |
415 |
op_container_end_page |
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