Enhance seasonal amplitude of atmospheric CO2 by the changing Southern Ocean carbon sink
The enhanced seasonal amplitude of atmospheric CO 2 has been viewed so far primarily as a Northern Hemisphere phenomenon. Yet, analyses of atmospheric CO 2 records from 49 stations between 1980 and 2018 reveal substantial trends and variations in this amplitude globally. While no significant trends...
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ftarchimer:oai:archimer.ifremer.fr:91321 2023-05-15T17:51:09+02:00 Enhance seasonal amplitude of atmospheric CO2 by the changing Southern Ocean carbon sink Yun, Jeongmin Jeong, Sujong Gruber, Nicolas Gregor, Luke Ho, Chang-hoi Piao, Shilong Ciais, Philippe Schimel, David Kwon, Eun Young 2022-10 application/pdf https://archimer.ifremer.fr/doc/00801/91321/97131.pdf https://doi.org/10.1126/sciadv.abq0220 https://archimer.ifremer.fr/doc/00801/91321/ eng eng American Association for the Advancement of Science (AAAS) https://archimer.ifremer.fr/doc/00801/91321/97131.pdf doi:10.1126/sciadv.abq0220 https://archimer.ifremer.fr/doc/00801/91321/ info:eu-repo/semantics/openAccess restricted use Science Advances (2375-2548) (American Association for the Advancement of Science (AAAS)), 2022-10 , Vol. 8 , N. 41 , P. eabq0220 (12p.) text Publication info:eu-repo/semantics/article 2022 ftarchimer https://doi.org/10.1126/sciadv.abq0220 2023-03-14T23:55:22Z The enhanced seasonal amplitude of atmospheric CO 2 has been viewed so far primarily as a Northern Hemisphere phenomenon. Yet, analyses of atmospheric CO 2 records from 49 stations between 1980 and 2018 reveal substantial trends and variations in this amplitude globally. While no significant trends can be discerned before 2000 in most places, strong positive trends emerge after 2000 in the southern high latitudes. Using factorial simulations with an atmospheric transport model and analyses of surface ocean P co 2 observations, we show that the increase is best explained by the onset of increasing seasonality of air-sea CO 2 exchange over the Southern Ocean around 2000. Underlying these changes is the long-term ocean acidification trend that tends to enhance the seasonality of the air-sea fluxes, but this trend is modified by the decadal variability of the Southern Ocean carbon sink. The seasonal variations of atmospheric CO 2 thus emerge as a sensitive recorder of the variations of the Southern Ocean carbon sink. Article in Journal/Newspaper Ocean acidification Southern Ocean Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Southern Ocean Science Advances 8 41 |
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Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
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ftarchimer |
language |
English |
description |
The enhanced seasonal amplitude of atmospheric CO 2 has been viewed so far primarily as a Northern Hemisphere phenomenon. Yet, analyses of atmospheric CO 2 records from 49 stations between 1980 and 2018 reveal substantial trends and variations in this amplitude globally. While no significant trends can be discerned before 2000 in most places, strong positive trends emerge after 2000 in the southern high latitudes. Using factorial simulations with an atmospheric transport model and analyses of surface ocean P co 2 observations, we show that the increase is best explained by the onset of increasing seasonality of air-sea CO 2 exchange over the Southern Ocean around 2000. Underlying these changes is the long-term ocean acidification trend that tends to enhance the seasonality of the air-sea fluxes, but this trend is modified by the decadal variability of the Southern Ocean carbon sink. The seasonal variations of atmospheric CO 2 thus emerge as a sensitive recorder of the variations of the Southern Ocean carbon sink. |
format |
Article in Journal/Newspaper |
author |
Yun, Jeongmin Jeong, Sujong Gruber, Nicolas Gregor, Luke Ho, Chang-hoi Piao, Shilong Ciais, Philippe Schimel, David Kwon, Eun Young |
spellingShingle |
Yun, Jeongmin Jeong, Sujong Gruber, Nicolas Gregor, Luke Ho, Chang-hoi Piao, Shilong Ciais, Philippe Schimel, David Kwon, Eun Young Enhance seasonal amplitude of atmospheric CO2 by the changing Southern Ocean carbon sink |
author_facet |
Yun, Jeongmin Jeong, Sujong Gruber, Nicolas Gregor, Luke Ho, Chang-hoi Piao, Shilong Ciais, Philippe Schimel, David Kwon, Eun Young |
author_sort |
Yun, Jeongmin |
title |
Enhance seasonal amplitude of atmospheric CO2 by the changing Southern Ocean carbon sink |
title_short |
Enhance seasonal amplitude of atmospheric CO2 by the changing Southern Ocean carbon sink |
title_full |
Enhance seasonal amplitude of atmospheric CO2 by the changing Southern Ocean carbon sink |
title_fullStr |
Enhance seasonal amplitude of atmospheric CO2 by the changing Southern Ocean carbon sink |
title_full_unstemmed |
Enhance seasonal amplitude of atmospheric CO2 by the changing Southern Ocean carbon sink |
title_sort |
enhance seasonal amplitude of atmospheric co2 by the changing southern ocean carbon sink |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2022 |
url |
https://archimer.ifremer.fr/doc/00801/91321/97131.pdf https://doi.org/10.1126/sciadv.abq0220 https://archimer.ifremer.fr/doc/00801/91321/ |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Ocean acidification Southern Ocean |
genre_facet |
Ocean acidification Southern Ocean |
op_source |
Science Advances (2375-2548) (American Association for the Advancement of Science (AAAS)), 2022-10 , Vol. 8 , N. 41 , P. eabq0220 (12p.) |
op_relation |
https://archimer.ifremer.fr/doc/00801/91321/97131.pdf doi:10.1126/sciadv.abq0220 https://archimer.ifremer.fr/doc/00801/91321/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1126/sciadv.abq0220 |
container_title |
Science Advances |
container_volume |
8 |
container_issue |
41 |
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1766158194663489536 |