Dynamical and biogeochemical control on the decadal variability of ocean carbon fluxes
Several recent observation-based studies suggest that ocean anthropogenic carbon uptake has slowed down due to the impact of anthropogenic forced climate change. However, it remains unclear whether detected changes over the recent time period can be attributed to anthropogenic climate change or rath...
Published in: | Earth System Dynamics |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2013
|
Subjects: | |
Online Access: | https://doi.org/10.5194/esd-4-109-2013 https://doaj.org/article/12f44e22c2b54712baae12d7320908d1 |
id |
ftdoajarticles:oai:doaj.org/article:12f44e22c2b54712baae12d7320908d1 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:12f44e22c2b54712baae12d7320908d1 2023-05-15T17:31:41+02:00 Dynamical and biogeochemical control on the decadal variability of ocean carbon fluxes R. Séférian L. Bopp D. Swingedouw J. Servonnat 2013-04-01T00:00:00Z https://doi.org/10.5194/esd-4-109-2013 https://doaj.org/article/12f44e22c2b54712baae12d7320908d1 EN eng Copernicus Publications http://www.earth-syst-dynam.net/4/109/2013/esd-4-109-2013.pdf https://doaj.org/toc/2190-4979 https://doaj.org/toc/2190-4987 doi:10.5194/esd-4-109-2013 2190-4979 2190-4987 https://doaj.org/article/12f44e22c2b54712baae12d7320908d1 Earth System Dynamics, Vol 4, Iss 1, Pp 109-127 (2013) Science Q Geology QE1-996.5 Dynamic and structural geology QE500-639.5 article 2013 ftdoajarticles https://doi.org/10.5194/esd-4-109-2013 2022-12-31T11:24:14Z Several recent observation-based studies suggest that ocean anthropogenic carbon uptake has slowed down due to the impact of anthropogenic forced climate change. However, it remains unclear whether detected changes over the recent time period can be attributed to anthropogenic climate change or rather to natural climate variability (internal plus naturally forced variability) alone. One large uncertainty arises from the lack of knowledge on ocean carbon flux natural variability at the decadal time scales. To gain more insights into decadal time scales, we have examined the internal variability of ocean carbon fluxes in a 1000 yr long preindustrial simulation performed with the Earth System Model IPSL-CM5A-LR. Our analysis shows that ocean carbon fluxes exhibit low-frequency oscillations that emerge from their year-to-year variability in the North Atlantic, the North Pacific, and the Southern Ocean. In our model, a 20 yr mode of variability in the North Atlantic air-sea carbon flux is driven by sea surface temperature variability and accounts for ~40% of the interannual regional variance. The North Pacific and the Southern Ocean carbon fluxes are also characterised by decadal to multi-decadal modes of variability (10 to 50 yr) that account for 20–40% of the interannual regional variance. These modes are driven by the vertical supply of dissolved inorganic carbon through the variability of Ekman-induced upwelling and deep-mixing events. Differences in drivers of regional modes of variability stem from the coupling between ocean dynamics variability and the ocean carbon distribution, which is set by large-scale secular ocean circulation. Article in Journal/Newspaper North Atlantic Southern Ocean Directory of Open Access Journals: DOAJ Articles Southern Ocean Pacific Earth System Dynamics 4 1 109 127 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Science Q Geology QE1-996.5 Dynamic and structural geology QE500-639.5 |
spellingShingle |
Science Q Geology QE1-996.5 Dynamic and structural geology QE500-639.5 R. Séférian L. Bopp D. Swingedouw J. Servonnat Dynamical and biogeochemical control on the decadal variability of ocean carbon fluxes |
topic_facet |
Science Q Geology QE1-996.5 Dynamic and structural geology QE500-639.5 |
description |
Several recent observation-based studies suggest that ocean anthropogenic carbon uptake has slowed down due to the impact of anthropogenic forced climate change. However, it remains unclear whether detected changes over the recent time period can be attributed to anthropogenic climate change or rather to natural climate variability (internal plus naturally forced variability) alone. One large uncertainty arises from the lack of knowledge on ocean carbon flux natural variability at the decadal time scales. To gain more insights into decadal time scales, we have examined the internal variability of ocean carbon fluxes in a 1000 yr long preindustrial simulation performed with the Earth System Model IPSL-CM5A-LR. Our analysis shows that ocean carbon fluxes exhibit low-frequency oscillations that emerge from their year-to-year variability in the North Atlantic, the North Pacific, and the Southern Ocean. In our model, a 20 yr mode of variability in the North Atlantic air-sea carbon flux is driven by sea surface temperature variability and accounts for ~40% of the interannual regional variance. The North Pacific and the Southern Ocean carbon fluxes are also characterised by decadal to multi-decadal modes of variability (10 to 50 yr) that account for 20–40% of the interannual regional variance. These modes are driven by the vertical supply of dissolved inorganic carbon through the variability of Ekman-induced upwelling and deep-mixing events. Differences in drivers of regional modes of variability stem from the coupling between ocean dynamics variability and the ocean carbon distribution, which is set by large-scale secular ocean circulation. |
format |
Article in Journal/Newspaper |
author |
R. Séférian L. Bopp D. Swingedouw J. Servonnat |
author_facet |
R. Séférian L. Bopp D. Swingedouw J. Servonnat |
author_sort |
R. Séférian |
title |
Dynamical and biogeochemical control on the decadal variability of ocean carbon fluxes |
title_short |
Dynamical and biogeochemical control on the decadal variability of ocean carbon fluxes |
title_full |
Dynamical and biogeochemical control on the decadal variability of ocean carbon fluxes |
title_fullStr |
Dynamical and biogeochemical control on the decadal variability of ocean carbon fluxes |
title_full_unstemmed |
Dynamical and biogeochemical control on the decadal variability of ocean carbon fluxes |
title_sort |
dynamical and biogeochemical control on the decadal variability of ocean carbon fluxes |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/esd-4-109-2013 https://doaj.org/article/12f44e22c2b54712baae12d7320908d1 |
geographic |
Southern Ocean Pacific |
geographic_facet |
Southern Ocean Pacific |
genre |
North Atlantic Southern Ocean |
genre_facet |
North Atlantic Southern Ocean |
op_source |
Earth System Dynamics, Vol 4, Iss 1, Pp 109-127 (2013) |
op_relation |
http://www.earth-syst-dynam.net/4/109/2013/esd-4-109-2013.pdf https://doaj.org/toc/2190-4979 https://doaj.org/toc/2190-4987 doi:10.5194/esd-4-109-2013 2190-4979 2190-4987 https://doaj.org/article/12f44e22c2b54712baae12d7320908d1 |
op_doi |
https://doi.org/10.5194/esd-4-109-2013 |
container_title |
Earth System Dynamics |
container_volume |
4 |
container_issue |
1 |
container_start_page |
109 |
op_container_end_page |
127 |
_version_ |
1766129370006552576 |