Enhance seasonal amplitude of atmospheric CO 2 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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craaas:10.1126/sciadv.abq0220 2024-06-23T07:55:52+00:00 Enhance seasonal amplitude of atmospheric CO 2 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 http://dx.doi.org/10.1126/sciadv.abq0220 https://www.science.org/doi/pdf/10.1126/sciadv.abq0220 en eng American Association for the Advancement of Science (AAAS) Science Advances volume 8, issue 41 ISSN 2375-2548 journal-article 2022 craaas https://doi.org/10.1126/sciadv.abq0220 2024-06-13T04:01:25Z 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 AAAS Resource Center (American Association for the Advancement of Science) Southern Ocean Science Advances 8 41 |
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AAAS Resource Center (American Association for the Advancement of Science) |
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craaas |
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 CO 2 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 CO 2 by the changing Southern Ocean carbon sink |
title_short |
Enhance seasonal amplitude of atmospheric CO 2 by the changing Southern Ocean carbon sink |
title_full |
Enhance seasonal amplitude of atmospheric CO 2 by the changing Southern Ocean carbon sink |
title_fullStr |
Enhance seasonal amplitude of atmospheric CO 2 by the changing Southern Ocean carbon sink |
title_full_unstemmed |
Enhance seasonal amplitude of atmospheric CO 2 by the changing Southern Ocean carbon sink |
title_sort |
enhance seasonal amplitude of atmospheric co 2 by the changing southern ocean carbon sink |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2022 |
url |
http://dx.doi.org/10.1126/sciadv.abq0220 https://www.science.org/doi/pdf/10.1126/sciadv.abq0220 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Ocean acidification Southern Ocean |
genre_facet |
Ocean acidification Southern Ocean |
op_source |
Science Advances volume 8, issue 41 ISSN 2375-2548 |
op_doi |
https://doi.org/10.1126/sciadv.abq0220 |
container_title |
Science Advances |
container_volume |
8 |
container_issue |
41 |
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1802648631762747392 |