Total ozone trends at three northern high-latitude stations
After the decrease of ozone-depleting substances (ODSs) as a consequence of the Montreal Protocol, it is still challenging to detect a recovery in the total column amount of ozone (total ozone) at northern high-latitudes. To assess regional total ozone changes in the "ozone-recovery"-perio...
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ftcopernicus:oai:publications.copernicus.org:acpd105057 2023-05-15T13:25:37+02:00 Total ozone trends at three northern high-latitude stations Bernet, Leonie Svendby, Tove Hansen, Georg Orsolini, Yvan Dahlback, Arne Goutail, Florence Pazmiño, Andrea Petkov, Boyan Kylling, Arve 2022-07-18 application/pdf https://doi.org/10.5194/acp-2022-488 https://acp.copernicus.org/preprints/acp-2022-488/ eng eng doi:10.5194/acp-2022-488 https://acp.copernicus.org/preprints/acp-2022-488/ eISSN: 1680-7324 Text 2022 ftcopernicus https://doi.org/10.5194/acp-2022-488 2022-07-25T16:22:42Z After the decrease of ozone-depleting substances (ODSs) as a consequence of the Montreal Protocol, it is still challenging to detect a recovery in the total column amount of ozone (total ozone) at northern high-latitudes. To assess regional total ozone changes in the "ozone-recovery"-period (2000–2020) at northern high-latitudes, this study investigates trends from ground-based total ozone measurements at three stations in Norway (Oslo, Andøya, and Ny-Ålesund). For this purpose, we combine measurements from Brewer spectrophotometers, ground-based UV filter radiometers (GUVs), and a SAOZ instrument. The Brewer measurements have been extended to work under cloudy conditions using the global irradiance (GI) technique, which is also presented in this study. We derive trends from the combined ground-based time series with the multiple linear regression model from the Long-term Ozone Trends and Uncertainties in the Stratosphere (LOTUS) project. We evaluate various predictors in the regression model and found that tropopause pressure and lower-stratospheric temperature contribute most to ozone variability at the three stations. We report significant positive trends at Andøya (0.9 % per decade) and Ny-Ålesund (1.5 % per decade) and no annual trends at Oslo, but significant positive trends in autumn at all stations. Finally we found positive but insignificant trends of around 3 % per decade in March at all three stations, which may be an indication for Arctic spring-time ozone recovery. Our results contribute to a better understanding of regional total ozone trends at northern high-latitudes, which is essential to assess how Arctic ozone responds to changes in ODSs and to climate change. Text Andøya Arctic Climate change Ny Ålesund Ny-Ålesund Copernicus Publications: E-Journals Andøya ENVELOPE(13.982,13.982,68.185,68.185) Arctic Norway Ny-Ålesund |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
After the decrease of ozone-depleting substances (ODSs) as a consequence of the Montreal Protocol, it is still challenging to detect a recovery in the total column amount of ozone (total ozone) at northern high-latitudes. To assess regional total ozone changes in the "ozone-recovery"-period (2000–2020) at northern high-latitudes, this study investigates trends from ground-based total ozone measurements at three stations in Norway (Oslo, Andøya, and Ny-Ålesund). For this purpose, we combine measurements from Brewer spectrophotometers, ground-based UV filter radiometers (GUVs), and a SAOZ instrument. The Brewer measurements have been extended to work under cloudy conditions using the global irradiance (GI) technique, which is also presented in this study. We derive trends from the combined ground-based time series with the multiple linear regression model from the Long-term Ozone Trends and Uncertainties in the Stratosphere (LOTUS) project. We evaluate various predictors in the regression model and found that tropopause pressure and lower-stratospheric temperature contribute most to ozone variability at the three stations. We report significant positive trends at Andøya (0.9 % per decade) and Ny-Ålesund (1.5 % per decade) and no annual trends at Oslo, but significant positive trends in autumn at all stations. Finally we found positive but insignificant trends of around 3 % per decade in March at all three stations, which may be an indication for Arctic spring-time ozone recovery. Our results contribute to a better understanding of regional total ozone trends at northern high-latitudes, which is essential to assess how Arctic ozone responds to changes in ODSs and to climate change. |
format |
Text |
author |
Bernet, Leonie Svendby, Tove Hansen, Georg Orsolini, Yvan Dahlback, Arne Goutail, Florence Pazmiño, Andrea Petkov, Boyan Kylling, Arve |
spellingShingle |
Bernet, Leonie Svendby, Tove Hansen, Georg Orsolini, Yvan Dahlback, Arne Goutail, Florence Pazmiño, Andrea Petkov, Boyan Kylling, Arve Total ozone trends at three northern high-latitude stations |
author_facet |
Bernet, Leonie Svendby, Tove Hansen, Georg Orsolini, Yvan Dahlback, Arne Goutail, Florence Pazmiño, Andrea Petkov, Boyan Kylling, Arve |
author_sort |
Bernet, Leonie |
title |
Total ozone trends at three northern high-latitude stations |
title_short |
Total ozone trends at three northern high-latitude stations |
title_full |
Total ozone trends at three northern high-latitude stations |
title_fullStr |
Total ozone trends at three northern high-latitude stations |
title_full_unstemmed |
Total ozone trends at three northern high-latitude stations |
title_sort |
total ozone trends at three northern high-latitude stations |
publishDate |
2022 |
url |
https://doi.org/10.5194/acp-2022-488 https://acp.copernicus.org/preprints/acp-2022-488/ |
long_lat |
ENVELOPE(13.982,13.982,68.185,68.185) |
geographic |
Andøya Arctic Norway Ny-Ålesund |
geographic_facet |
Andøya Arctic Norway Ny-Ålesund |
genre |
Andøya Arctic Climate change Ny Ålesund Ny-Ålesund |
genre_facet |
Andøya Arctic Climate change Ny Ålesund Ny-Ålesund |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-2022-488 https://acp.copernicus.org/preprints/acp-2022-488/ |
op_doi |
https://doi.org/10.5194/acp-2022-488 |
_version_ |
1766386709891645440 |