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 to 106 years), but its importance during past warm...
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ftsouthampton:oai:eprints.soton.ac.uk:453192 2024-05-12T07:56:13+00:00 Enhanced terrestrial carbon export from East Antarctica during the early Eocene Inglis, Gordon Toney, Jaime Zhu, Jiang Poulsen, Christopher J. Röhl, Ulla Jamieson, Stewart S.R. Pross, Jörg Cramwinckel, Margot J Krishnan, Srinath Pagani, Mark Bijl, P.K. Bendle, James 2021-12-08 text https://eprints.soton.ac.uk/453192/ https://eprints.soton.ac.uk/453192/1/inglis_2022.pdf en English eng https://eprints.soton.ac.uk/453192/1/inglis_2022.pdf Inglis, Gordon, Toney, Jaime, Zhu, Jiang, Poulsen, Christopher J., Röhl, Ulla, Jamieson, Stewart S.R., Pross, Jörg, Cramwinckel, Margot J, Krishnan, Srinath, Pagani, Mark, Bijl, P.K. and Bendle, James (2021) Enhanced terrestrial carbon export from East Antarctica during the early Eocene. Paleoceanography and Paleoclimatology. (In Press) accepted_manuscript Article PeerReviewed 2021 ftsouthampton 2024-04-17T14:07:16Z 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 to 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 to 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 δ 2H values indicate that the EECO was characterised 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 UOB Open could have acted as an important negative feedback mechanism during the early Eocene, but also during other warm climate intervals. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Wilkes Land University of Southampton: e-Prints Soton East Antarctica Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
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 to 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 to 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 δ 2H values indicate that the EECO was characterised 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 UOB Open could have acted as an important negative feedback mechanism during the early Eocene, but also during other warm climate intervals. |
format |
Article in Journal/Newspaper |
author |
Inglis, Gordon Toney, Jaime Zhu, Jiang Poulsen, Christopher J. Röhl, Ulla Jamieson, Stewart S.R. Pross, Jörg Cramwinckel, Margot J Krishnan, Srinath Pagani, Mark Bijl, P.K. Bendle, James |
spellingShingle |
Inglis, Gordon Toney, Jaime Zhu, Jiang Poulsen, Christopher J. Röhl, Ulla Jamieson, Stewart S.R. Pross, Jörg Cramwinckel, Margot J Krishnan, Srinath Pagani, Mark Bijl, P.K. Bendle, James Enhanced terrestrial carbon export from East Antarctica during the early Eocene |
author_facet |
Inglis, Gordon Toney, Jaime Zhu, Jiang Poulsen, Christopher J. Röhl, Ulla Jamieson, Stewart S.R. Pross, Jörg Cramwinckel, Margot J Krishnan, Srinath Pagani, Mark Bijl, P.K. Bendle, James |
author_sort |
Inglis, Gordon |
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 |
publishDate |
2021 |
url |
https://eprints.soton.ac.uk/453192/ https://eprints.soton.ac.uk/453192/1/inglis_2022.pdf |
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_relation |
https://eprints.soton.ac.uk/453192/1/inglis_2022.pdf Inglis, Gordon, Toney, Jaime, Zhu, Jiang, Poulsen, Christopher J., Röhl, Ulla, Jamieson, Stewart S.R., Pross, Jörg, Cramwinckel, Margot J, Krishnan, Srinath, Pagani, Mark, Bijl, P.K. and Bendle, James (2021) Enhanced terrestrial carbon export from East Antarctica during the early Eocene. Paleoceanography and Paleoclimatology. (In Press) |
op_rights |
accepted_manuscript |
_version_ |
1798836203494047744 |