Air-sea disequilibrium enhances ocean carbon storage during glacial periods
The prevailing hypothesis for lower atmospheric carbon dioxide (CO2) concentrations during glacial periods is an increased efficiency of the ocean’s biological pump. However, tests of this and other hypotheses have been hampered by the difficulty to accurately quantify ocean carbon components. Here,...
Published in: | Science Advances |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Association for the Advancement of Science
|
Subjects: | |
Online Access: | http://hdl.handle.net/11336/110965 |
id |
ftconicet:oai:ri.conicet.gov.ar:11336/110965 |
---|---|
record_format |
openpolar |
spelling |
ftconicet:oai:ri.conicet.gov.ar:11336/110965 2023-10-09T21:55:52+02:00 Air-sea disequilibrium enhances ocean carbon storage during glacial periods Khatiwala, S. Schmittner, A. Muglia, Juan application/pdf http://hdl.handle.net/11336/110965 eng eng American Association for the Advancement of Science info:eu-repo/semantics/altIdentifier/url/http://advances.sciencemag.org/lookup/doi/10.1126/sciadv.aaw4981 info:eu-repo/semantics/altIdentifier/doi/10.1126/sciadv.aaw4981 http://hdl.handle.net/11336/110965 Khatiwala, S.; Schmittner, A.; Muglia, Juan; Air-sea disequilibrium enhances ocean carbon storage during glacial periods; American Association for the Advancement of Science; Science Advances; 5; 6; 18-6-2019; 1-11 2375-2548 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ CARBON GLACIAL PERIODS AIR-SEA GAS EXCHANGE https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1126/sciadv.aaw4981 2023-09-24T19:24:41Z The prevailing hypothesis for lower atmospheric carbon dioxide (CO2) concentrations during glacial periods is an increased efficiency of the ocean’s biological pump. However, tests of this and other hypotheses have been hampered by the difficulty to accurately quantify ocean carbon components. Here, we use an observationally constrained earth system model to precisely quantify these components and the role that different processes play in simulated glacial-interglacial CO2 variations. We find that air-sea disequilibrium greatly amplifies the effects of cooler temperatures and iron fertilization on glacial ocean carbon storage even as the efficiency of the soft-tissue biological pump decreases. These two processes, which have previously been regarded as minor, explain most of our simulated glacial CO2 drawdown, while ocean circulation and sea ice extent, hitherto considered dominant, emerge as relatively small contributors. Fil: Khatiwala, S. University of Oxford; Reino Unido Fil: Schmittner, A. State University Of Oregon. College Of Earth, Ocean And Atmospheric Sciences.; Estados Unidos Fil: Muglia, Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina. State University Of Oregon. College Of Earth, Ocean And Atmospheric Sciences.; Estados Unidos Article in Journal/Newspaper Sea ice CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Argentina Science Advances 5 6 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
CARBON GLACIAL PERIODS AIR-SEA GAS EXCHANGE https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
CARBON GLACIAL PERIODS AIR-SEA GAS EXCHANGE https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Khatiwala, S. Schmittner, A. Muglia, Juan Air-sea disequilibrium enhances ocean carbon storage during glacial periods |
topic_facet |
CARBON GLACIAL PERIODS AIR-SEA GAS EXCHANGE https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
The prevailing hypothesis for lower atmospheric carbon dioxide (CO2) concentrations during glacial periods is an increased efficiency of the ocean’s biological pump. However, tests of this and other hypotheses have been hampered by the difficulty to accurately quantify ocean carbon components. Here, we use an observationally constrained earth system model to precisely quantify these components and the role that different processes play in simulated glacial-interglacial CO2 variations. We find that air-sea disequilibrium greatly amplifies the effects of cooler temperatures and iron fertilization on glacial ocean carbon storage even as the efficiency of the soft-tissue biological pump decreases. These two processes, which have previously been regarded as minor, explain most of our simulated glacial CO2 drawdown, while ocean circulation and sea ice extent, hitherto considered dominant, emerge as relatively small contributors. Fil: Khatiwala, S. University of Oxford; Reino Unido Fil: Schmittner, A. State University Of Oregon. College Of Earth, Ocean And Atmospheric Sciences.; Estados Unidos Fil: Muglia, Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina. State University Of Oregon. College Of Earth, Ocean And Atmospheric Sciences.; Estados Unidos |
format |
Article in Journal/Newspaper |
author |
Khatiwala, S. Schmittner, A. Muglia, Juan |
author_facet |
Khatiwala, S. Schmittner, A. Muglia, Juan |
author_sort |
Khatiwala, S. |
title |
Air-sea disequilibrium enhances ocean carbon storage during glacial periods |
title_short |
Air-sea disequilibrium enhances ocean carbon storage during glacial periods |
title_full |
Air-sea disequilibrium enhances ocean carbon storage during glacial periods |
title_fullStr |
Air-sea disequilibrium enhances ocean carbon storage during glacial periods |
title_full_unstemmed |
Air-sea disequilibrium enhances ocean carbon storage during glacial periods |
title_sort |
air-sea disequilibrium enhances ocean carbon storage during glacial periods |
publisher |
American Association for the Advancement of Science |
url |
http://hdl.handle.net/11336/110965 |
geographic |
Argentina |
geographic_facet |
Argentina |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://advances.sciencemag.org/lookup/doi/10.1126/sciadv.aaw4981 info:eu-repo/semantics/altIdentifier/doi/10.1126/sciadv.aaw4981 http://hdl.handle.net/11336/110965 Khatiwala, S.; Schmittner, A.; Muglia, Juan; Air-sea disequilibrium enhances ocean carbon storage during glacial periods; American Association for the Advancement of Science; Science Advances; 5; 6; 18-6-2019; 1-11 2375-2548 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1126/sciadv.aaw4981 |
container_title |
Science Advances |
container_volume |
5 |
container_issue |
6 |
_version_ |
1779320083167838208 |