Carbonate dissolution enhanced by ocean stagnation and respiration at the onset of the Paleocene-Eocene thermal maximum
The Paleocene-Eocene Thermal Maximum was a transient, carbon-induced global warming event, considered the closest analog to ongoing climate change. Impacts of a decrease in deepwater formation during the onset of the Paleocene-Eocene Thermal Maximum suggested by proxy data on the carbon cycle are no...
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ftpubman:oai:pure.mpg.de:item_3027550 2023-08-27T04:12:11+02:00 Carbonate dissolution enhanced by ocean stagnation and respiration at the onset of the Paleocene-Eocene thermal maximum Ilyina, T. Heinze, M. 2019 application/pdf http://hdl.handle.net/21.11116/0000-0003-0BCB-D http://hdl.handle.net/21.11116/0000-0003-14A1-0 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1029/2018GL080761 http://hdl.handle.net/21.11116/0000-0003-0BCB-D http://hdl.handle.net/21.11116/0000-0003-14A1-0 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/3.0/ Geophysical Research Letters info:eu-repo/semantics/article 2019 ftpubman https://doi.org/10.1029/2018GL080761 2023-08-02T01:20:40Z The Paleocene-Eocene Thermal Maximum was a transient, carbon-induced global warming event, considered the closest analog to ongoing climate change. Impacts of a decrease in deepwater formation during the onset of the Paleocene-Eocene Thermal Maximum suggested by proxy data on the carbon cycle are not yet fully understood. Using an Earth System Model, we find that changes in overturning circulation are key to reproduce the deoxygenation and carbonate dissolution record. Weakening of the Southern Ocean deepwater formation and enhancement of ocean stratification driven by warming cause an asymmetry in carbonate dissolution between the Atlantic and Pacific basins suggested by proxy data. Reduced ventilation results in accumulation of remineralization products (CO2 and nutrients) in intermediate waters, thereby lowering O2 and increasing CO2. As a result, carbonate dissolution is triggered throughout the water column, while the ocean surface remains supersaturated. Our findings contribute to understanding of the long-term response of the carbon cycle to climate change. ©2018. The Authors. Article in Journal/Newspaper Southern Ocean Max Planck Society: MPG.PuRe Southern Ocean Pacific Geophysical Research Letters 46 2 842 852 |
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Max Planck Society: MPG.PuRe |
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ftpubman |
language |
English |
description |
The Paleocene-Eocene Thermal Maximum was a transient, carbon-induced global warming event, considered the closest analog to ongoing climate change. Impacts of a decrease in deepwater formation during the onset of the Paleocene-Eocene Thermal Maximum suggested by proxy data on the carbon cycle are not yet fully understood. Using an Earth System Model, we find that changes in overturning circulation are key to reproduce the deoxygenation and carbonate dissolution record. Weakening of the Southern Ocean deepwater formation and enhancement of ocean stratification driven by warming cause an asymmetry in carbonate dissolution between the Atlantic and Pacific basins suggested by proxy data. Reduced ventilation results in accumulation of remineralization products (CO2 and nutrients) in intermediate waters, thereby lowering O2 and increasing CO2. As a result, carbonate dissolution is triggered throughout the water column, while the ocean surface remains supersaturated. Our findings contribute to understanding of the long-term response of the carbon cycle to climate change. ©2018. The Authors. |
format |
Article in Journal/Newspaper |
author |
Ilyina, T. Heinze, M. |
spellingShingle |
Ilyina, T. Heinze, M. Carbonate dissolution enhanced by ocean stagnation and respiration at the onset of the Paleocene-Eocene thermal maximum |
author_facet |
Ilyina, T. Heinze, M. |
author_sort |
Ilyina, T. |
title |
Carbonate dissolution enhanced by ocean stagnation and respiration at the onset of the Paleocene-Eocene thermal maximum |
title_short |
Carbonate dissolution enhanced by ocean stagnation and respiration at the onset of the Paleocene-Eocene thermal maximum |
title_full |
Carbonate dissolution enhanced by ocean stagnation and respiration at the onset of the Paleocene-Eocene thermal maximum |
title_fullStr |
Carbonate dissolution enhanced by ocean stagnation and respiration at the onset of the Paleocene-Eocene thermal maximum |
title_full_unstemmed |
Carbonate dissolution enhanced by ocean stagnation and respiration at the onset of the Paleocene-Eocene thermal maximum |
title_sort |
carbonate dissolution enhanced by ocean stagnation and respiration at the onset of the paleocene-eocene thermal maximum |
publishDate |
2019 |
url |
http://hdl.handle.net/21.11116/0000-0003-0BCB-D http://hdl.handle.net/21.11116/0000-0003-14A1-0 |
geographic |
Southern Ocean Pacific |
geographic_facet |
Southern Ocean Pacific |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Geophysical Research Letters |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2018GL080761 http://hdl.handle.net/21.11116/0000-0003-0BCB-D http://hdl.handle.net/21.11116/0000-0003-14A1-0 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/3.0/ |
op_doi |
https://doi.org/10.1029/2018GL080761 |
container_title |
Geophysical Research Letters |
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46 |
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2 |
container_start_page |
842 |
op_container_end_page |
852 |
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1775356056730337280 |