Enhanced Terrestrial Carbon Export From East Antarctica During the Early Eocene
Terrestrial organic carbon (TerrOC) acts as an important CO2 sink when transported via rivers to the ocean and sequestered in coastal marine sediments. This mechanism might help to modulate atmospheric CO2 levels over short- and long- timescales (103–106 years), but its importance during past warm c...
Published in: | Paleoceanography and Paleoclimatology |
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Online Access: | https://hdl.handle.net/11250/2998284 https://doi.org/10.1029/2021PA004348 |
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ftcicerosfk:oai:pub.cicero.oslo.no:11250/2998284 2023-05-15T13:38:18+02:00 Enhanced Terrestrial Carbon Export From East Antarctica During the Early Eocene Inglis, Gordon N. Toney, Jaime L. Zhu, Jiang Poulsen, Christopher J. Röhl, Ursula Jamieson, Stewart S. R. Pross, Jörg Cramwinckel, Margot J. Srinath, Krishnan Pagani, Mark Bijl, Peter K. Bendle, James 2022 application/pdf https://hdl.handle.net/11250/2998284 https://doi.org/10.1029/2021PA004348 eng eng AGU Paleoceanography and Paleoclimatology. 2022, 37 (2), . urn:issn:2572-4517 https://hdl.handle.net/11250/2998284 https://doi.org/10.1029/2021PA004348 cristin:2019202 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no CC-BY 0 37 Paleoceanography and Paleoclimatology 2 Journal article Peer reviewed 2022 ftcicerosfk https://doi.org/10.1029/2021PA004348 2022-06-15T22:44:00Z Terrestrial organic carbon (TerrOC) acts as an important CO2 sink when transported via rivers to the ocean and sequestered in coastal marine sediments. This mechanism might help to modulate atmospheric CO2 levels over short- and long- timescales (103–106 years), but its importance during past warm climates remains unknown. Here we use terrestrial biomarkers preserved in coastal marine sediment samples from Wilkes Land, East Antarctica (∼67°S) to quantify TerrOC burial during the early Eocene (∼54.4–51.5 Ma). Terrestrial biomarker distributions indicate the delivery of plant-, soil-, and peat-derived organic carbon (OC) into the marine realm. Mass accumulation rates of plant- (long-chain n-alkane) and soil-derived (hopane) biomarkers dramatically increase between the earliest Eocene (∼54 Ma) and the early Eocene Climatic Optimum (EECO; ∼53 Ma). This coincides with increased OC mass accumulation rates and indicates enhanced TerrOC burial during the EECO. Leaf wax δ2H values indicate that the EECO was characterized by wetter conditions relative to the earliest Eocene, suggesting that hydroclimate exerts a first-order control on TerrOC export. Our results indicate that TerrOC burial in coastal marine sediments could have acted as an important negative feedback mechanism during the early Eocene, but also during other warm climate intervals. publishedVersion Article in Journal/Newspaper Antarc* Antarctica East Antarctica Wilkes Land Center for International Climate and Environmental Research Oslo (BIBSYS Brage) East Antarctica Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Paleoceanography and Paleoclimatology 37 2 |
institution |
Open Polar |
collection |
Center for International Climate and Environmental Research Oslo (BIBSYS Brage) |
op_collection_id |
ftcicerosfk |
language |
English |
description |
Terrestrial organic carbon (TerrOC) acts as an important CO2 sink when transported via rivers to the ocean and sequestered in coastal marine sediments. This mechanism might help to modulate atmospheric CO2 levels over short- and long- timescales (103–106 years), but its importance during past warm climates remains unknown. Here we use terrestrial biomarkers preserved in coastal marine sediment samples from Wilkes Land, East Antarctica (∼67°S) to quantify TerrOC burial during the early Eocene (∼54.4–51.5 Ma). Terrestrial biomarker distributions indicate the delivery of plant-, soil-, and peat-derived organic carbon (OC) into the marine realm. Mass accumulation rates of plant- (long-chain n-alkane) and soil-derived (hopane) biomarkers dramatically increase between the earliest Eocene (∼54 Ma) and the early Eocene Climatic Optimum (EECO; ∼53 Ma). This coincides with increased OC mass accumulation rates and indicates enhanced TerrOC burial during the EECO. Leaf wax δ2H values indicate that the EECO was characterized by wetter conditions relative to the earliest Eocene, suggesting that hydroclimate exerts a first-order control on TerrOC export. Our results indicate that TerrOC burial in coastal marine sediments could have acted as an important negative feedback mechanism during the early Eocene, but also during other warm climate intervals. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Inglis, Gordon N. Toney, Jaime L. Zhu, Jiang Poulsen, Christopher J. Röhl, Ursula Jamieson, Stewart S. R. Pross, Jörg Cramwinckel, Margot J. Srinath, Krishnan Pagani, Mark Bijl, Peter K. Bendle, James |
spellingShingle |
Inglis, Gordon N. Toney, Jaime L. Zhu, Jiang Poulsen, Christopher J. Röhl, Ursula Jamieson, Stewart S. R. Pross, Jörg Cramwinckel, Margot J. Srinath, Krishnan Pagani, Mark Bijl, Peter K. Bendle, James Enhanced Terrestrial Carbon Export From East Antarctica During the Early Eocene |
author_facet |
Inglis, Gordon N. Toney, Jaime L. Zhu, Jiang Poulsen, Christopher J. Röhl, Ursula Jamieson, Stewart S. R. Pross, Jörg Cramwinckel, Margot J. Srinath, Krishnan Pagani, Mark Bijl, Peter K. Bendle, James |
author_sort |
Inglis, Gordon N. |
title |
Enhanced Terrestrial Carbon Export From East Antarctica During the Early Eocene |
title_short |
Enhanced Terrestrial Carbon Export From East Antarctica During the Early Eocene |
title_full |
Enhanced Terrestrial Carbon Export From East Antarctica During the Early Eocene |
title_fullStr |
Enhanced Terrestrial Carbon Export From East Antarctica During the Early Eocene |
title_full_unstemmed |
Enhanced Terrestrial Carbon Export From East Antarctica During the Early Eocene |
title_sort |
enhanced terrestrial carbon export from east antarctica during the early eocene |
publisher |
AGU |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/2998284 https://doi.org/10.1029/2021PA004348 |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) |
geographic |
East Antarctica Wilkes Land |
geographic_facet |
East Antarctica Wilkes Land |
genre |
Antarc* Antarctica East Antarctica Wilkes Land |
genre_facet |
Antarc* Antarctica East Antarctica Wilkes Land |
op_source |
0 37 Paleoceanography and Paleoclimatology 2 |
op_relation |
Paleoceanography and Paleoclimatology. 2022, 37 (2), . urn:issn:2572-4517 https://hdl.handle.net/11250/2998284 https://doi.org/10.1029/2021PA004348 cristin:2019202 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2021PA004348 |
container_title |
Paleoceanography and Paleoclimatology |
container_volume |
37 |
container_issue |
2 |
_version_ |
1766103879631503360 |