Long-term time series of Arctic tropospheric BrO derived from UV–VIS satellite remote sensing and its relation to first-year sea ice
Every polar spring, phenomena called bromine explosions occur over sea ice. These bromine explosions comprise photochemical heterogeneous chain reactions that release bromine molecules, Br 2 , to the troposphere and lead to tropospheric plumes of bromine monoxide, BrO. This autocatalytic mechanism d...
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ftcopernicus:oai:publications.copernicus.org:acp83697 2023-05-15T14:55:34+02:00 Long-term time series of Arctic tropospheric BrO derived from UV–VIS satellite remote sensing and its relation to first-year sea ice Bougoudis, Ilias Blechschmidt, Anne-Marlene Richter, Andreas Seo, Sora Burrows, John Philip Theys, Nicolas Rinke, Annette 2020-10-22 application/pdf https://doi.org/10.5194/acp-20-11869-2020 https://acp.copernicus.org/articles/20/11869/2020/ eng eng doi:10.5194/acp-20-11869-2020 https://acp.copernicus.org/articles/20/11869/2020/ eISSN: 1680-7324 Text 2020 ftcopernicus https://doi.org/10.5194/acp-20-11869-2020 2020-10-26T17:22:13Z Every polar spring, phenomena called bromine explosions occur over sea ice. These bromine explosions comprise photochemical heterogeneous chain reactions that release bromine molecules, Br 2 , to the troposphere and lead to tropospheric plumes of bromine monoxide, BrO. This autocatalytic mechanism depletes ozone, O 3 , in the boundary layer and troposphere and thereby changes the oxidizing capacity of the atmosphere. The phenomenon also leads to accelerated deposition of metals (e.g., Hg). In this study, we present a 22-year (1996 to 2017) consolidated and consistent tropospheric BrO dataset north of 70 ∘ N, derived from four different ultraviolet–visible (UV–VIS) satellite instruments (GOME, SCIAMACHY, GOME-2A and GOME-2B). The retrieval data products from the different sensors are compared during periods of overlap and show good agreement (correlations of 0.82–0.98 between the sensors). From our merged time series of tropospheric BrO vertical column densities (VCDs), we infer changes in the bromine explosions and thus an increase in the extent and magnitude of tropospheric BrO plumes during the period of Arctic warming. We determined an increasing trend of about 1.5 % of the tropospheric BrO VCDs per year during polar springs, while the size of the areas where enhanced tropospheric BrO VCDs can be found has increased about 896 km 2 yr −1 . We infer from comparisons and correlations with sea ice age data that the reported changes in the extent and magnitude of tropospheric BrO VCDs are moderately related to the increase in first-year ice extent in the Arctic north of 70 ∘ N, both temporally and spatially, with a correlation coefficient of 0.32. However, the BrO plumes and thus bromine explosions show significant variability, which also depends, apart from sea ice, on meteorological conditions. Text Arctic Sea ice Copernicus Publications: E-Journals Arctic Atmospheric Chemistry and Physics 20 20 11869 11892 |
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Open Polar |
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Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Every polar spring, phenomena called bromine explosions occur over sea ice. These bromine explosions comprise photochemical heterogeneous chain reactions that release bromine molecules, Br 2 , to the troposphere and lead to tropospheric plumes of bromine monoxide, BrO. This autocatalytic mechanism depletes ozone, O 3 , in the boundary layer and troposphere and thereby changes the oxidizing capacity of the atmosphere. The phenomenon also leads to accelerated deposition of metals (e.g., Hg). In this study, we present a 22-year (1996 to 2017) consolidated and consistent tropospheric BrO dataset north of 70 ∘ N, derived from four different ultraviolet–visible (UV–VIS) satellite instruments (GOME, SCIAMACHY, GOME-2A and GOME-2B). The retrieval data products from the different sensors are compared during periods of overlap and show good agreement (correlations of 0.82–0.98 between the sensors). From our merged time series of tropospheric BrO vertical column densities (VCDs), we infer changes in the bromine explosions and thus an increase in the extent and magnitude of tropospheric BrO plumes during the period of Arctic warming. We determined an increasing trend of about 1.5 % of the tropospheric BrO VCDs per year during polar springs, while the size of the areas where enhanced tropospheric BrO VCDs can be found has increased about 896 km 2 yr −1 . We infer from comparisons and correlations with sea ice age data that the reported changes in the extent and magnitude of tropospheric BrO VCDs are moderately related to the increase in first-year ice extent in the Arctic north of 70 ∘ N, both temporally and spatially, with a correlation coefficient of 0.32. However, the BrO plumes and thus bromine explosions show significant variability, which also depends, apart from sea ice, on meteorological conditions. |
format |
Text |
author |
Bougoudis, Ilias Blechschmidt, Anne-Marlene Richter, Andreas Seo, Sora Burrows, John Philip Theys, Nicolas Rinke, Annette |
spellingShingle |
Bougoudis, Ilias Blechschmidt, Anne-Marlene Richter, Andreas Seo, Sora Burrows, John Philip Theys, Nicolas Rinke, Annette Long-term time series of Arctic tropospheric BrO derived from UV–VIS satellite remote sensing and its relation to first-year sea ice |
author_facet |
Bougoudis, Ilias Blechschmidt, Anne-Marlene Richter, Andreas Seo, Sora Burrows, John Philip Theys, Nicolas Rinke, Annette |
author_sort |
Bougoudis, Ilias |
title |
Long-term time series of Arctic tropospheric BrO derived from UV–VIS satellite remote sensing and its relation to first-year sea ice |
title_short |
Long-term time series of Arctic tropospheric BrO derived from UV–VIS satellite remote sensing and its relation to first-year sea ice |
title_full |
Long-term time series of Arctic tropospheric BrO derived from UV–VIS satellite remote sensing and its relation to first-year sea ice |
title_fullStr |
Long-term time series of Arctic tropospheric BrO derived from UV–VIS satellite remote sensing and its relation to first-year sea ice |
title_full_unstemmed |
Long-term time series of Arctic tropospheric BrO derived from UV–VIS satellite remote sensing and its relation to first-year sea ice |
title_sort |
long-term time series of arctic tropospheric bro derived from uv–vis satellite remote sensing and its relation to first-year sea ice |
publishDate |
2020 |
url |
https://doi.org/10.5194/acp-20-11869-2020 https://acp.copernicus.org/articles/20/11869/2020/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-20-11869-2020 https://acp.copernicus.org/articles/20/11869/2020/ |
op_doi |
https://doi.org/10.5194/acp-20-11869-2020 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
20 |
container_issue |
20 |
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11869 |
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11892 |
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1766327599768797184 |