Seasonal to decadal spatiotemporal variations of the global ocean carbon sink
The global ocean has absorbed approximately 30% of anthropogenic CO2 since the beginning of the industrial revolution. However, the spatiotemporal evolution of this important global carbon sink varies substantially on all timescales and has not yet been well evaluated. Here, based on a reconstructed...
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ftarchimer:oai:archimer.ifremer.fr:86717 2023-05-15T18:24:55+02:00 Seasonal to decadal spatiotemporal variations of the global ocean carbon sink Zhang, Min Cheng, Yangyan Bao, Ying Zhao, Chang Wang, Gang Zhang, Yuanling Song, Zhenya Wu, Zhaohua Qiao, Fangli 2022-03 application/pdf https://archimer.ifremer.fr/doc/00755/86717/92152.pdf https://doi.org/10.1111/gcb.16031 https://archimer.ifremer.fr/doc/00755/86717/ eng eng Wiley https://archimer.ifremer.fr/doc/00755/86717/92152.pdf doi:10.1111/gcb.16031 https://archimer.ifremer.fr/doc/00755/86717/ info:eu-repo/semantics/openAccess restricted use Global Change Biology (1354-1013) (Wiley), 2022-03 , Vol. 28 , N. 5 , P. 1786-1797 decadal variation ensemble empirical mode decomposition equatorial Pacific Ocean modulated annual cycle ocean carbon sink seasonal strengthening Southern Ocean text Publication info:eu-repo/semantics/article 2022 ftarchimer https://doi.org/10.1111/gcb.16031 2022-03-15T23:50:01Z The global ocean has absorbed approximately 30% of anthropogenic CO2 since the beginning of the industrial revolution. However, the spatiotemporal evolution of this important global carbon sink varies substantially on all timescales and has not yet been well evaluated. Here, based on a reconstructed observation-based product of surface ocean pCO(2) and air-sea CO2 flux (the MPI-SOMFFN method), we investigated seasonal to decadal spatiotemporal variations of the ocean CO2 sink during the past three decades using an adaptive data analysis method. Two predominant variations are modulated annual cycles and decadal fluctuations, which account for approximately 46% and 25% of all extracted components, respectively. Although the whole summer to non-summer seasonal difference pattern is determined by the Southern Ocean, the non-summer CO2 sink at mid-latitudes in both hemispheres shows an increasing trend (a total increase of approximately 1.0 PgC during the period 1982-2019), while it is relatively stable in summer. On decadal timescales for the global ocean carbon sink, unlike the weakening decade (1990-1999) and the reinvigoration decade (2000-2009) in which the Southern Ocean plays the dominant role, the reinforcement decade (2010-2019) is mainly the result from the weakening source effect in the equatorial Pacific Ocean. Our results suggest that except for the Southern Ocean's role in the global ocean carbon sink, the strengthening non-summer's sink at mid-latitudes in both hemispheres and the decadal or longer timescales of equatorial Pacific Ocean dynamics should be fully considered in understanding the oceanic carbon cycle on a global scale. Article in Journal/Newspaper Southern Ocean Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Pacific Southern Ocean Global Change Biology 28 5 1786 1797 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
decadal variation ensemble empirical mode decomposition equatorial Pacific Ocean modulated annual cycle ocean carbon sink seasonal strengthening Southern Ocean |
spellingShingle |
decadal variation ensemble empirical mode decomposition equatorial Pacific Ocean modulated annual cycle ocean carbon sink seasonal strengthening Southern Ocean Zhang, Min Cheng, Yangyan Bao, Ying Zhao, Chang Wang, Gang Zhang, Yuanling Song, Zhenya Wu, Zhaohua Qiao, Fangli Seasonal to decadal spatiotemporal variations of the global ocean carbon sink |
topic_facet |
decadal variation ensemble empirical mode decomposition equatorial Pacific Ocean modulated annual cycle ocean carbon sink seasonal strengthening Southern Ocean |
description |
The global ocean has absorbed approximately 30% of anthropogenic CO2 since the beginning of the industrial revolution. However, the spatiotemporal evolution of this important global carbon sink varies substantially on all timescales and has not yet been well evaluated. Here, based on a reconstructed observation-based product of surface ocean pCO(2) and air-sea CO2 flux (the MPI-SOMFFN method), we investigated seasonal to decadal spatiotemporal variations of the ocean CO2 sink during the past three decades using an adaptive data analysis method. Two predominant variations are modulated annual cycles and decadal fluctuations, which account for approximately 46% and 25% of all extracted components, respectively. Although the whole summer to non-summer seasonal difference pattern is determined by the Southern Ocean, the non-summer CO2 sink at mid-latitudes in both hemispheres shows an increasing trend (a total increase of approximately 1.0 PgC during the period 1982-2019), while it is relatively stable in summer. On decadal timescales for the global ocean carbon sink, unlike the weakening decade (1990-1999) and the reinvigoration decade (2000-2009) in which the Southern Ocean plays the dominant role, the reinforcement decade (2010-2019) is mainly the result from the weakening source effect in the equatorial Pacific Ocean. Our results suggest that except for the Southern Ocean's role in the global ocean carbon sink, the strengthening non-summer's sink at mid-latitudes in both hemispheres and the decadal or longer timescales of equatorial Pacific Ocean dynamics should be fully considered in understanding the oceanic carbon cycle on a global scale. |
format |
Article in Journal/Newspaper |
author |
Zhang, Min Cheng, Yangyan Bao, Ying Zhao, Chang Wang, Gang Zhang, Yuanling Song, Zhenya Wu, Zhaohua Qiao, Fangli |
author_facet |
Zhang, Min Cheng, Yangyan Bao, Ying Zhao, Chang Wang, Gang Zhang, Yuanling Song, Zhenya Wu, Zhaohua Qiao, Fangli |
author_sort |
Zhang, Min |
title |
Seasonal to decadal spatiotemporal variations of the global ocean carbon sink |
title_short |
Seasonal to decadal spatiotemporal variations of the global ocean carbon sink |
title_full |
Seasonal to decadal spatiotemporal variations of the global ocean carbon sink |
title_fullStr |
Seasonal to decadal spatiotemporal variations of the global ocean carbon sink |
title_full_unstemmed |
Seasonal to decadal spatiotemporal variations of the global ocean carbon sink |
title_sort |
seasonal to decadal spatiotemporal variations of the global ocean carbon sink |
publisher |
Wiley |
publishDate |
2022 |
url |
https://archimer.ifremer.fr/doc/00755/86717/92152.pdf https://doi.org/10.1111/gcb.16031 https://archimer.ifremer.fr/doc/00755/86717/ |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Global Change Biology (1354-1013) (Wiley), 2022-03 , Vol. 28 , N. 5 , P. 1786-1797 |
op_relation |
https://archimer.ifremer.fr/doc/00755/86717/92152.pdf doi:10.1111/gcb.16031 https://archimer.ifremer.fr/doc/00755/86717/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1111/gcb.16031 |
container_title |
Global Change Biology |
container_volume |
28 |
container_issue |
5 |
container_start_page |
1786 |
op_container_end_page |
1797 |
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1766205966546632704 |