Winter season Southern Ocean distributions of climate-relevant trace gases
Climate-relevant trace gas air–sea exchange exerts an important control on air quality and climate, especially in remote regions of the planet such as the Southern Ocean. It is clear that polar regions exhibit seasonal trends in productivity and biogeochemical cycling, but almost all of the measurem...
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ftcopernicus:oai:publications.copernicus.org:bg102815 2023-05-15T18:24:02+02:00 Winter season Southern Ocean distributions of climate-relevant trace gases Zhou, Li Booge, Dennis Zhang, Miming Marandino, Christa A. 2022-10-28 application/pdf https://doi.org/10.5194/bg-19-5021-2022 https://bg.copernicus.org/articles/19/5021/2022/ eng eng doi:10.5194/bg-19-5021-2022 https://bg.copernicus.org/articles/19/5021/2022/ eISSN: 1726-4189 Text 2022 ftcopernicus https://doi.org/10.5194/bg-19-5021-2022 2022-10-31T17:22:41Z Climate-relevant trace gas air–sea exchange exerts an important control on air quality and climate, especially in remote regions of the planet such as the Southern Ocean. It is clear that polar regions exhibit seasonal trends in productivity and biogeochemical cycling, but almost all of the measurements there are skewed to summer months. If we want to understand how the Southern Ocean affects the balance of climate through trace gas air–sea exchange, it is essential to expand our measurement database over greater temporal and spatial scales, including all seasons. Therefore, in this study, we report measured concentrations of dimethylsulfide (DMS, as well as related sulfur compounds) and isoprene in the Atlantic sector of the Southern Ocean during the winter to understand the spatial and temporal distribution in comparison to current knowledge and climatological calculations for the Southern Ocean. The observations of isoprene are the first in the winter season in the Southern Ocean. We found that the concentrations of DMS from the surface seawater and air in the investigated area were 1.03 ± 0.98 nmol −1 and 28.80 ± 12.49 pptv, respectively. The concentrations of isoprene in surface seawater were 14.46 ± 12.23 pmol −1 . DMS and isoprene fluxes were 4.04 ± 4.12 µ mol m −2 d −1 and 80.55 ± 78.57 nmol m −2 d −1 , respectively. These results are generally lower than the values presented or calculated in currently used climatologies and models. More data are urgently needed to better interpolate climatological values and validate process-oriented models, as well as to explore how finer measurement resolution, both spatially and temporally, can influence air–sea flux calculations. Text Southern Ocean Copernicus Publications: E-Journals Southern Ocean Biogeosciences 19 20 5021 5040 |
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Copernicus Publications: E-Journals |
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English |
description |
Climate-relevant trace gas air–sea exchange exerts an important control on air quality and climate, especially in remote regions of the planet such as the Southern Ocean. It is clear that polar regions exhibit seasonal trends in productivity and biogeochemical cycling, but almost all of the measurements there are skewed to summer months. If we want to understand how the Southern Ocean affects the balance of climate through trace gas air–sea exchange, it is essential to expand our measurement database over greater temporal and spatial scales, including all seasons. Therefore, in this study, we report measured concentrations of dimethylsulfide (DMS, as well as related sulfur compounds) and isoprene in the Atlantic sector of the Southern Ocean during the winter to understand the spatial and temporal distribution in comparison to current knowledge and climatological calculations for the Southern Ocean. The observations of isoprene are the first in the winter season in the Southern Ocean. We found that the concentrations of DMS from the surface seawater and air in the investigated area were 1.03 ± 0.98 nmol −1 and 28.80 ± 12.49 pptv, respectively. The concentrations of isoprene in surface seawater were 14.46 ± 12.23 pmol −1 . DMS and isoprene fluxes were 4.04 ± 4.12 µ mol m −2 d −1 and 80.55 ± 78.57 nmol m −2 d −1 , respectively. These results are generally lower than the values presented or calculated in currently used climatologies and models. More data are urgently needed to better interpolate climatological values and validate process-oriented models, as well as to explore how finer measurement resolution, both spatially and temporally, can influence air–sea flux calculations. |
format |
Text |
author |
Zhou, Li Booge, Dennis Zhang, Miming Marandino, Christa A. |
spellingShingle |
Zhou, Li Booge, Dennis Zhang, Miming Marandino, Christa A. Winter season Southern Ocean distributions of climate-relevant trace gases |
author_facet |
Zhou, Li Booge, Dennis Zhang, Miming Marandino, Christa A. |
author_sort |
Zhou, Li |
title |
Winter season Southern Ocean distributions of climate-relevant trace gases |
title_short |
Winter season Southern Ocean distributions of climate-relevant trace gases |
title_full |
Winter season Southern Ocean distributions of climate-relevant trace gases |
title_fullStr |
Winter season Southern Ocean distributions of climate-relevant trace gases |
title_full_unstemmed |
Winter season Southern Ocean distributions of climate-relevant trace gases |
title_sort |
winter season southern ocean distributions of climate-relevant trace gases |
publishDate |
2022 |
url |
https://doi.org/10.5194/bg-19-5021-2022 https://bg.copernicus.org/articles/19/5021/2022/ |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
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Southern Ocean |
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eISSN: 1726-4189 |
op_relation |
doi:10.5194/bg-19-5021-2022 https://bg.copernicus.org/articles/19/5021/2022/ |
op_doi |
https://doi.org/10.5194/bg-19-5021-2022 |
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Biogeosciences |
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19 |
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20 |
container_start_page |
5021 |
op_container_end_page |
5040 |
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1766204305224761344 |