Decadal Trends in the Oceanic Storage of Anthropogenic Carbon From 1994 to 2014
The oceanic uptake and resulting storage of the anthropogenic CO₂ (Cₐₙₜ) that humans have emitted into the atmosphere moderates climate change. Yet our knowledge about how this uptake and storage has progressed in time remained limited. Here, we determine decadal trends in the storage of Cₐₙₜ by app...
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/628166 2024-02-27T08:43:32+00:00 Decadal Trends in the Oceanic Storage of Anthropogenic Carbon From 1994 to 2014 Müller, Jens Daniel id_orcid:0 000-0003-3137-0883 Gruber, Nicolas id_orcid:0 000-0002-2085-2310 Carter, Brendan Feely, Richard Ishii, Masao Lange, Nico Lauvset, Siv K. Murata, Akihiko Olsen, Are Peréz, Fiz Fernandez Sabine, Christopher Tanhua, Toste Wanninkhof, Rik Zhu, Donghe 2023-08 application/application/pdf https://hdl.handle.net/20.500.11850/628166 https://doi.org/10.3929/ethz-b-000628166 en eng American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2023AV000875 info:eu-repo/semantics/altIdentifier/wos/001048589400001 info:eu-repo/grantAgreement/EC/H2020/821003 info:eu-repo/grantAgreement/EC/H2020/821001 http://hdl.handle.net/20.500.11850/628166 doi:10.3929/ethz-b-000628166 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International AGU Advances, 4 (4) ocean carbon climate info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2023 ftethz https://doi.org/20.500.11850/62816610.3929/ethz-b-00062816610.1029/2023AV000875 2024-01-29T00:52:00Z The oceanic uptake and resulting storage of the anthropogenic CO₂ (Cₐₙₜ) that humans have emitted into the atmosphere moderates climate change. Yet our knowledge about how this uptake and storage has progressed in time remained limited. Here, we determine decadal trends in the storage of Cₐₙₜ by applying the eMLR(C*) regression method to ocean interior observations collected repeatedly since the 1990s. We find that the global ocean storage of Cₐₙₜ grew from 1994 to 2004 by 29 ± 3 Pg C dec⁻¹ and from 2004 to 2014 by 27 ± 3 Pg C dec⁻¹ (±1σ). The storage change in the second decade is about 15 ± 11% lower than one would expect from the first decade and assuming proportional increase with atmospheric CO₂ . We attribute this reduction in sensitivity to a decrease of the ocean buffer capacity and changes in ocean circulation. In the Atlantic Ocean, the maximum storage rate shifted from the Northern to the Southern Hemisphere, plausibly caused by a weaker formation rate of North Atlantic Deep Waters and an intensified ventilation of mode and intermediate waters in the Southern Hemisphere. Our estimates of the Cₐₙₜ accumulation differ from cumulative net air-sea flux estimates by several Pg C dec⁻¹, suggesting a substantial and variable, but uncertain net loss of natural carbon from the ocean. Our findings indicate a considerable vulnerability of the ocean carbon sink to climate variability and change. ISSN:2576-604X Article in Journal/Newspaper North Atlantic ETH Zürich Research Collection |
institution |
Open Polar |
collection |
ETH Zürich Research Collection |
op_collection_id |
ftethz |
language |
English |
topic |
ocean carbon climate |
spellingShingle |
ocean carbon climate Müller, Jens Daniel id_orcid:0 000-0003-3137-0883 Gruber, Nicolas id_orcid:0 000-0002-2085-2310 Carter, Brendan Feely, Richard Ishii, Masao Lange, Nico Lauvset, Siv K. Murata, Akihiko Olsen, Are Peréz, Fiz Fernandez Sabine, Christopher Tanhua, Toste Wanninkhof, Rik Zhu, Donghe Decadal Trends in the Oceanic Storage of Anthropogenic Carbon From 1994 to 2014 |
topic_facet |
ocean carbon climate |
description |
The oceanic uptake and resulting storage of the anthropogenic CO₂ (Cₐₙₜ) that humans have emitted into the atmosphere moderates climate change. Yet our knowledge about how this uptake and storage has progressed in time remained limited. Here, we determine decadal trends in the storage of Cₐₙₜ by applying the eMLR(C*) regression method to ocean interior observations collected repeatedly since the 1990s. We find that the global ocean storage of Cₐₙₜ grew from 1994 to 2004 by 29 ± 3 Pg C dec⁻¹ and from 2004 to 2014 by 27 ± 3 Pg C dec⁻¹ (±1σ). The storage change in the second decade is about 15 ± 11% lower than one would expect from the first decade and assuming proportional increase with atmospheric CO₂ . We attribute this reduction in sensitivity to a decrease of the ocean buffer capacity and changes in ocean circulation. In the Atlantic Ocean, the maximum storage rate shifted from the Northern to the Southern Hemisphere, plausibly caused by a weaker formation rate of North Atlantic Deep Waters and an intensified ventilation of mode and intermediate waters in the Southern Hemisphere. Our estimates of the Cₐₙₜ accumulation differ from cumulative net air-sea flux estimates by several Pg C dec⁻¹, suggesting a substantial and variable, but uncertain net loss of natural carbon from the ocean. Our findings indicate a considerable vulnerability of the ocean carbon sink to climate variability and change. ISSN:2576-604X |
format |
Article in Journal/Newspaper |
author |
Müller, Jens Daniel id_orcid:0 000-0003-3137-0883 Gruber, Nicolas id_orcid:0 000-0002-2085-2310 Carter, Brendan Feely, Richard Ishii, Masao Lange, Nico Lauvset, Siv K. Murata, Akihiko Olsen, Are Peréz, Fiz Fernandez Sabine, Christopher Tanhua, Toste Wanninkhof, Rik Zhu, Donghe |
author_facet |
Müller, Jens Daniel id_orcid:0 000-0003-3137-0883 Gruber, Nicolas id_orcid:0 000-0002-2085-2310 Carter, Brendan Feely, Richard Ishii, Masao Lange, Nico Lauvset, Siv K. Murata, Akihiko Olsen, Are Peréz, Fiz Fernandez Sabine, Christopher Tanhua, Toste Wanninkhof, Rik Zhu, Donghe |
author_sort |
Müller, Jens Daniel |
title |
Decadal Trends in the Oceanic Storage of Anthropogenic Carbon From 1994 to 2014 |
title_short |
Decadal Trends in the Oceanic Storage of Anthropogenic Carbon From 1994 to 2014 |
title_full |
Decadal Trends in the Oceanic Storage of Anthropogenic Carbon From 1994 to 2014 |
title_fullStr |
Decadal Trends in the Oceanic Storage of Anthropogenic Carbon From 1994 to 2014 |
title_full_unstemmed |
Decadal Trends in the Oceanic Storage of Anthropogenic Carbon From 1994 to 2014 |
title_sort |
decadal trends in the oceanic storage of anthropogenic carbon from 1994 to 2014 |
publisher |
American Geophysical Union |
publishDate |
2023 |
url |
https://hdl.handle.net/20.500.11850/628166 https://doi.org/10.3929/ethz-b-000628166 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
AGU Advances, 4 (4) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2023AV000875 info:eu-repo/semantics/altIdentifier/wos/001048589400001 info:eu-repo/grantAgreement/EC/H2020/821003 info:eu-repo/grantAgreement/EC/H2020/821001 http://hdl.handle.net/20.500.11850/628166 doi:10.3929/ethz-b-000628166 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International |
op_doi |
https://doi.org/20.500.11850/62816610.3929/ethz-b-00062816610.1029/2023AV000875 |
_version_ |
1792051547238039552 |