A High‐Fidelity Benthic Stable Isotope Record of Late Cretaceous–Early Eocene Climate Change and Carbon‐Cycling
The Late Cretaceous–Early Paleogene is the most recent period in Earth history that experienced sustained global greenhouse warmth on multimillion year timescales. Yet, knowledge of ambient climate conditions and the complex interplay between various forcing mechanisms are still poorly constrained....
Published in: | Paleoceanography and Paleoclimatology |
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American Geophysical Union
2019
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Online Access: | http://nora.nerc.ac.uk/id/eprint/523163/ https://nora.nerc.ac.uk/id/eprint/523163/1/Barnet_et_al-2019-Paleoceanography_and_Paleoclimatology.pdf https://doi.org/10.1029/2019PA003556 |
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ftnerc:oai:nora.nerc.ac.uk:523163 2023-05-15T17:34:47+02:00 A High‐Fidelity Benthic Stable Isotope Record of Late Cretaceous–Early Eocene Climate Change and Carbon‐Cycling Barnet, J.S.K. Littler, K. Westerhold, T. Kroon, D. Leng, M.J. Bailey, I. Röhl, U. Zachos, J.C. 2019 text http://nora.nerc.ac.uk/id/eprint/523163/ https://nora.nerc.ac.uk/id/eprint/523163/1/Barnet_et_al-2019-Paleoceanography_and_Paleoclimatology.pdf https://doi.org/10.1029/2019PA003556 en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/523163/1/Barnet_et_al-2019-Paleoceanography_and_Paleoclimatology.pdf Barnet, J.S.K.; Littler, K.; Westerhold, T.; Kroon, D.; Leng, M.J. orcid:0000-0003-1115-5166 Bailey, I.; Röhl, U.; Zachos, J.C. 2019 A High‐Fidelity Benthic Stable Isotope Record of Late Cretaceous–Early Eocene Climate Change and Carbon‐Cycling. Paleoceanography and Paleoclimatology, 34 (4). 672-691. https://doi.org/10.1029/2019PA003556 <https://doi.org/10.1029/2019PA003556> cc_by_4 CC-BY Publication - Article PeerReviewed 2019 ftnerc https://doi.org/10.1029/2019PA003556 2023-02-04T19:48:15Z The Late Cretaceous–Early Paleogene is the most recent period in Earth history that experienced sustained global greenhouse warmth on multimillion year timescales. Yet, knowledge of ambient climate conditions and the complex interplay between various forcing mechanisms are still poorly constrained. Here we present a 14.75 million‐year‐long, high‐resolution, orbitally tuned record of paired climate change and carbon‐cycling for this enigmatic period (~67–52 Ma), which we compare to an up‐to‐date compilation of atmospheric pCO2 records. Our climate and carbon‐cycling records, which are the highest resolution stratigraphically complete records to be constructed from a single marine site in the Atlantic Ocean, feature all major transient warming events (termed “hyperthermals”) known from this time period. We identify eccentricity as the dominant pacemaker of climate and the carbon cycle throughout the Late Maastrichtian to Early Eocene, through the modulation of precession. On average, changes in the carbon cycle lagged changes in climate by ~23,000 years at the long eccentricity (405,000‐year) band, and by ~3,000–4,500 years at the short eccentricity (100,000‐year) band, suggesting that light carbon was released as a positive feedback to warming induced by orbital forcing. Our new record places all known hyperthermals of the Late Maastrichtian–Early Eocene into temporal context with regards to evolving ambient climate of the time. We constrain potential carbon cycle influences of Large Igneous Province volcanism associated with the Deccan Traps and North Atlantic Igneous Province, as well as the sensitivity of climate and the carbon‐cycle to the 2.4 million‐year‐long eccentricity cycle. Article in Journal/Newspaper North Atlantic Natural Environment Research Council: NERC Open Research Archive Paleoceanography and Paleoclimatology 34 4 672 691 |
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Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
The Late Cretaceous–Early Paleogene is the most recent period in Earth history that experienced sustained global greenhouse warmth on multimillion year timescales. Yet, knowledge of ambient climate conditions and the complex interplay between various forcing mechanisms are still poorly constrained. Here we present a 14.75 million‐year‐long, high‐resolution, orbitally tuned record of paired climate change and carbon‐cycling for this enigmatic period (~67–52 Ma), which we compare to an up‐to‐date compilation of atmospheric pCO2 records. Our climate and carbon‐cycling records, which are the highest resolution stratigraphically complete records to be constructed from a single marine site in the Atlantic Ocean, feature all major transient warming events (termed “hyperthermals”) known from this time period. We identify eccentricity as the dominant pacemaker of climate and the carbon cycle throughout the Late Maastrichtian to Early Eocene, through the modulation of precession. On average, changes in the carbon cycle lagged changes in climate by ~23,000 years at the long eccentricity (405,000‐year) band, and by ~3,000–4,500 years at the short eccentricity (100,000‐year) band, suggesting that light carbon was released as a positive feedback to warming induced by orbital forcing. Our new record places all known hyperthermals of the Late Maastrichtian–Early Eocene into temporal context with regards to evolving ambient climate of the time. We constrain potential carbon cycle influences of Large Igneous Province volcanism associated with the Deccan Traps and North Atlantic Igneous Province, as well as the sensitivity of climate and the carbon‐cycle to the 2.4 million‐year‐long eccentricity cycle. |
format |
Article in Journal/Newspaper |
author |
Barnet, J.S.K. Littler, K. Westerhold, T. Kroon, D. Leng, M.J. Bailey, I. Röhl, U. Zachos, J.C. |
spellingShingle |
Barnet, J.S.K. Littler, K. Westerhold, T. Kroon, D. Leng, M.J. Bailey, I. Röhl, U. Zachos, J.C. A High‐Fidelity Benthic Stable Isotope Record of Late Cretaceous–Early Eocene Climate Change and Carbon‐Cycling |
author_facet |
Barnet, J.S.K. Littler, K. Westerhold, T. Kroon, D. Leng, M.J. Bailey, I. Röhl, U. Zachos, J.C. |
author_sort |
Barnet, J.S.K. |
title |
A High‐Fidelity Benthic Stable Isotope Record of Late Cretaceous–Early Eocene Climate Change and Carbon‐Cycling |
title_short |
A High‐Fidelity Benthic Stable Isotope Record of Late Cretaceous–Early Eocene Climate Change and Carbon‐Cycling |
title_full |
A High‐Fidelity Benthic Stable Isotope Record of Late Cretaceous–Early Eocene Climate Change and Carbon‐Cycling |
title_fullStr |
A High‐Fidelity Benthic Stable Isotope Record of Late Cretaceous–Early Eocene Climate Change and Carbon‐Cycling |
title_full_unstemmed |
A High‐Fidelity Benthic Stable Isotope Record of Late Cretaceous–Early Eocene Climate Change and Carbon‐Cycling |
title_sort |
high‐fidelity benthic stable isotope record of late cretaceous–early eocene climate change and carbon‐cycling |
publisher |
American Geophysical Union |
publishDate |
2019 |
url |
http://nora.nerc.ac.uk/id/eprint/523163/ https://nora.nerc.ac.uk/id/eprint/523163/1/Barnet_et_al-2019-Paleoceanography_and_Paleoclimatology.pdf https://doi.org/10.1029/2019PA003556 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://nora.nerc.ac.uk/id/eprint/523163/1/Barnet_et_al-2019-Paleoceanography_and_Paleoclimatology.pdf Barnet, J.S.K.; Littler, K.; Westerhold, T.; Kroon, D.; Leng, M.J. orcid:0000-0003-1115-5166 Bailey, I.; Röhl, U.; Zachos, J.C. 2019 A High‐Fidelity Benthic Stable Isotope Record of Late Cretaceous–Early Eocene Climate Change and Carbon‐Cycling. Paleoceanography and Paleoclimatology, 34 (4). 672-691. https://doi.org/10.1029/2019PA003556 <https://doi.org/10.1029/2019PA003556> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2019PA003556 |
container_title |
Paleoceanography and Paleoclimatology |
container_volume |
34 |
container_issue |
4 |
container_start_page |
672 |
op_container_end_page |
691 |
_version_ |
1766133724959735808 |