Spring and summer time ozone and solar ultraviolet radiation variations over Cape Point, South Africa
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...
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ftcopernicus:oai:publications.copernicus.org:angeo69462 2023-05-15T13:55:28+02:00 Spring and summer time ozone and solar ultraviolet radiation variations over Cape Point, South Africa Preez, David J. Ajtić, Jelena V. Bencherif, Hassan Bègue, Nelson Cadet, Jean-Maurice Wright, Caradee Y. 2019-03-06 application/pdf https://doi.org/10.5194/angeo-37-129-2019 https://angeo.copernicus.org/articles/37/129/2019/ eng eng doi:10.5194/angeo-37-129-2019 https://angeo.copernicus.org/articles/37/129/2019/ eISSN: 1432-0576 Text 2019 ftcopernicus https://doi.org/10.5194/angeo-37-129-2019 2020-07-20T16:22:55Z 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 R 2 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. Text Antarc* Antarctic Copernicus Publications: E-Journals Antarctic The Antarctic Annales Geophysicae 37 2 129 141 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
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English |
description |
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 R 2 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. |
format |
Text |
author |
Preez, David J. Ajtić, Jelena V. Bencherif, Hassan Bègue, Nelson Cadet, Jean-Maurice Wright, Caradee Y. |
spellingShingle |
Preez, David J. Ajtić, Jelena V. Bencherif, Hassan Bègue, Nelson Cadet, Jean-Maurice Wright, Caradee Y. Spring and summer time ozone and solar ultraviolet radiation variations over Cape Point, South Africa |
author_facet |
Preez, David J. Ajtić, Jelena V. Bencherif, Hassan Bègue, Nelson Cadet, Jean-Maurice Wright, Caradee Y. |
author_sort |
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 |
publishDate |
2019 |
url |
https://doi.org/10.5194/angeo-37-129-2019 https://angeo.copernicus.org/articles/37/129/2019/ |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
eISSN: 1432-0576 |
op_relation |
doi:10.5194/angeo-37-129-2019 https://angeo.copernicus.org/articles/37/129/2019/ |
op_doi |
https://doi.org/10.5194/angeo-37-129-2019 |
container_title |
Annales Geophysicae |
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37 |
container_issue |
2 |
container_start_page |
129 |
op_container_end_page |
141 |
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1766262117034360832 |