Spring and summer time ozone and solar ultraviolet radiation variations over Cape Point, South Africa
International audience The correlation between solar ultraviolet radiation (UV) and atmospheric ozone is well understood. Decreased stratospheric ozone levels which led to increased solar UV radiation levels at the surface have been recorded. These increased levels of solar UV radiation have potenti...
Published in: | Annales Geophysicae |
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Online Access: | https://hal.univ-reunion.fr/hal-02097468 https://hal.univ-reunion.fr/hal-02097468/document https://hal.univ-reunion.fr/hal-02097468/file/du%20Preez%20et%20al,%20ANGEO%202019.pdf https://doi.org/10.5194/angeo-37-129-2019 |
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ftunivreunion:oai:HAL:hal-02097468v1 2023-12-24T10:09:25+01:00 Spring and summer time ozone and solar ultraviolet radiation variations over Cape Point, South Africa Du Preez, David, J Ajti´c, Jelena, V Ajti´c Bencherif, Hassan Bègue, Nelson Cadet, Jean-Maurice Wright, Caradee, y Ajtić, Jelena University of Pretoria South Africa South African Weather Service (SAWS) 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 University of KwaZulu-Natal Durban, Afrique du Sud (UKZN) Medical Research Council South African University of Belgrade Belgrade 2019-03-06 https://hal.univ-reunion.fr/hal-02097468 https://hal.univ-reunion.fr/hal-02097468/document https://hal.univ-reunion.fr/hal-02097468/file/du%20Preez%20et%20al,%20ANGEO%202019.pdf https://doi.org/10.5194/angeo-37-129-2019 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/angeo-37-129-2019 hal-02097468 https://hal.univ-reunion.fr/hal-02097468 https://hal.univ-reunion.fr/hal-02097468/document https://hal.univ-reunion.fr/hal-02097468/file/du%20Preez%20et%20al,%20ANGEO%202019.pdf doi:10.5194/angeo-37-129-2019 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.univ-reunion.fr/hal-02097468 Annales Geophysicae, 2019, 37 (2), pp.129-141. ⟨10.5194/angeo-37-129-2019⟩ https://www.ann-geophys.net/37/129/2019/ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2019 ftunivreunion https://doi.org/10.5194/angeo-37-129-2019 2023-11-28T23:40:34Z International audience The correlation between solar ultraviolet radiation (UV) and atmospheric ozone is well understood. Decreased stratospheric ozone levels which led to increased solar UV radiation levels at the surface have been recorded. These increased levels of solar UV radiation have potential negative impacts on public health. This study was done to determine whether the break-up of the Antarctic ozone hole has an impact on stratospheric columnar ozone (SCO) and resulting ambient solar UV-B radiation levels at Cape Point, South Africa, over 2007–2016. We investigated the correlations between UV index, calculated from ground-based solar UV-B radiation measurements and satellite-retrieved column ozone data. The strongest anti-correlation on clear-sky days was found at solar zenith angle 25∘ with exponential fit R2 values of 0.45 and 0.53 for total ozone column and SCO, respectively. An average radiation amplification factor of 0.59 across all SZAs was calculated for clear-sky days. The MIMOSA-CHIM model showed that the polar vortex had a limited effect on ozone levels. Tropical air masses more frequently affect the study site, and this requires further investigation. Article in Journal/Newspaper Antarc* Antarctic Université de la Réunion: HAL Antarctic The Antarctic Annales Geophysicae 37 2 129 141 |
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Open Polar |
collection |
Université de la Réunion: HAL |
op_collection_id |
ftunivreunion |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
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[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Du Preez, David, J Ajti´c, Jelena, V Ajti´c Bencherif, Hassan Bègue, Nelson Cadet, Jean-Maurice Wright, Caradee, y Ajtić, Jelena Spring and summer time ozone and solar ultraviolet radiation variations over Cape Point, South Africa |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience The correlation between solar ultraviolet radiation (UV) and atmospheric ozone is well understood. Decreased stratospheric ozone levels which led to increased solar UV radiation levels at the surface have been recorded. These increased levels of solar UV radiation have potential negative impacts on public health. This study was done to determine whether the break-up of the Antarctic ozone hole has an impact on stratospheric columnar ozone (SCO) and resulting ambient solar UV-B radiation levels at Cape Point, South Africa, over 2007–2016. We investigated the correlations between UV index, calculated from ground-based solar UV-B radiation measurements and satellite-retrieved column ozone data. The strongest anti-correlation on clear-sky days was found at solar zenith angle 25∘ with exponential fit R2 values of 0.45 and 0.53 for total ozone column and SCO, respectively. An average radiation amplification factor of 0.59 across all SZAs was calculated for clear-sky days. The MIMOSA-CHIM model showed that the polar vortex had a limited effect on ozone levels. Tropical air masses more frequently affect the study site, and this requires further investigation. |
author2 |
University of Pretoria South Africa South African Weather Service (SAWS) 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 University of KwaZulu-Natal Durban, Afrique du Sud (UKZN) Medical Research Council South African University of Belgrade Belgrade |
format |
Article in Journal/Newspaper |
author |
Du Preez, David, J Ajti´c, Jelena, V Ajti´c Bencherif, Hassan Bègue, Nelson Cadet, Jean-Maurice Wright, Caradee, y Ajtić, Jelena |
author_facet |
Du Preez, David, J Ajti´c, Jelena, V Ajti´c Bencherif, Hassan Bègue, Nelson Cadet, Jean-Maurice Wright, Caradee, y Ajtić, Jelena |
author_sort |
Du Preez, David, J |
title |
Spring and summer time ozone and solar ultraviolet radiation variations over Cape Point, South Africa |
title_short |
Spring and summer time ozone and solar ultraviolet radiation variations over Cape Point, South Africa |
title_full |
Spring and summer time ozone and solar ultraviolet radiation variations over Cape Point, South Africa |
title_fullStr |
Spring and summer time ozone and solar ultraviolet radiation variations over Cape Point, South Africa |
title_full_unstemmed |
Spring and summer time ozone and solar ultraviolet radiation variations over Cape Point, South Africa |
title_sort |
spring and summer time ozone and solar ultraviolet radiation variations over cape point, south africa |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.univ-reunion.fr/hal-02097468 https://hal.univ-reunion.fr/hal-02097468/document https://hal.univ-reunion.fr/hal-02097468/file/du%20Preez%20et%20al,%20ANGEO%202019.pdf https://doi.org/10.5194/angeo-37-129-2019 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.univ-reunion.fr/hal-02097468 Annales Geophysicae, 2019, 37 (2), pp.129-141. ⟨10.5194/angeo-37-129-2019⟩ https://www.ann-geophys.net/37/129/2019/ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/angeo-37-129-2019 hal-02097468 https://hal.univ-reunion.fr/hal-02097468 https://hal.univ-reunion.fr/hal-02097468/document https://hal.univ-reunion.fr/hal-02097468/file/du%20Preez%20et%20al,%20ANGEO%202019.pdf doi:10.5194/angeo-37-129-2019 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/angeo-37-129-2019 |
container_title |
Annales Geophysicae |
container_volume |
37 |
container_issue |
2 |
container_start_page |
129 |
op_container_end_page |
141 |
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1786208023393337344 |