Barium concentrations and GDGT abundances across the PETM
Current climate change may induce positive carbon cycle feedbacks that amplify anthropogenic warming on time scales of centuries to millennia. Similar feedbacks might have been active during a phase of carbon cycle perturbation and global warming, termed the Paleocene-Eocene Thermal Maximum (PETM, 5...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.899283 2024-09-15T18:37:20+00:00 Barium concentrations and GDGT abundances across the PETM Frieling, Joost Peterse, Francien Lunt, Daniel J Bohaty, Steven M Sinninghe Damsté, Jaap S Reichart, Gert-Jan Sluijs, Appy MEDIAN LATITUDE: 16.909937 * MEDIAN LONGITUDE: 17.763722 * SOUTH-BOUND LATITUDE: 3.627500 * WEST-BOUND LONGITUDE: -2.735830 * NORTH-BOUND LATITUDE: 53.501750 * EAST-BOUND LONGITUDE: 73.526550 * DATE/TIME START: 1995-01-14T00:00:00 * DATE/TIME END: 1995-01-24T05:30:00 2019 application/zip, 4 datasets https://doi.pangaea.de/10.1594/PANGAEA.899283 https://doi.org/10.1594/PANGAEA.899283 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.899283 https://doi.org/10.1594/PANGAEA.899283 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Frieling, Joost; Peterse, Francien; Lunt, Daniel J; Bohaty, Steven M; Sinninghe Damsté, Jaap S; Reichart, Gert-Jan; Sluijs, Appy (2019): Widespread warming before and elevated barium burial during the Paleocene-Eocene Thermal Maximum: evidence for methane hydrate release? Paleoceanography and Paleoclimatology, https://doi.org/10.1029/2018PA003425 Ocean Drilling Program ODP dataset publication series 2019 ftpangaea https://doi.org/10.1594/PANGAEA.89928310.1029/2018PA003425 2024-07-24T02:31:21Z Current climate change may induce positive carbon cycle feedbacks that amplify anthropogenic warming on time scales of centuries to millennia. Similar feedbacks might have been active during a phase of carbon cycle perturbation and global warming, termed the Paleocene-Eocene Thermal Maximum (PETM, 56 million years ago). The PETM may help constrain these feedbacks and their sensitivity to warming. We present new high-resolution carbon isotope and sea surface temperature data from Ocean Drilling Project Site 959 in the Equatorial Atlantic. With these and existing data from the New Jersey shelf and Maud Rise, Southern Ocean, we quantify the lead-lag relation between PETM warming and the carbon input that caused the carbon isotope excursion. We show ~2 ºC of global warming preceded the CIE by millennia, strongly implicating CO2-driven warming triggered a positive carbon cycle feedback. We further compile new and published barium (Ba) records encompassing continental shelf, slope and deep-ocean settings. Based on this compilation, average Ba burial rates approximately tripled during the PETM, which may require an additional source of Ba to the ocean. Although the precipitation pathway is not well constrained, dissolved Ba stored in sulfate-depleted pore-waters below methane hydrates could represent an additional source. We speculate the most complete explanation for early warming and rise in Ba supply is that hydrate dissociation acted as a positive feedback and caused the CIE. This could imply hydrates are more temperature-sensitive than previously considered, and may warrant reconsideration of the political assignment of 2 °C warming as a safe future scenario. Other/Unknown Material Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-2.735830,73.526550,53.501750,3.627500) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Ocean Drilling Program ODP |
spellingShingle |
Ocean Drilling Program ODP Frieling, Joost Peterse, Francien Lunt, Daniel J Bohaty, Steven M Sinninghe Damsté, Jaap S Reichart, Gert-Jan Sluijs, Appy Barium concentrations and GDGT abundances across the PETM |
topic_facet |
Ocean Drilling Program ODP |
description |
Current climate change may induce positive carbon cycle feedbacks that amplify anthropogenic warming on time scales of centuries to millennia. Similar feedbacks might have been active during a phase of carbon cycle perturbation and global warming, termed the Paleocene-Eocene Thermal Maximum (PETM, 56 million years ago). The PETM may help constrain these feedbacks and their sensitivity to warming. We present new high-resolution carbon isotope and sea surface temperature data from Ocean Drilling Project Site 959 in the Equatorial Atlantic. With these and existing data from the New Jersey shelf and Maud Rise, Southern Ocean, we quantify the lead-lag relation between PETM warming and the carbon input that caused the carbon isotope excursion. We show ~2 ºC of global warming preceded the CIE by millennia, strongly implicating CO2-driven warming triggered a positive carbon cycle feedback. We further compile new and published barium (Ba) records encompassing continental shelf, slope and deep-ocean settings. Based on this compilation, average Ba burial rates approximately tripled during the PETM, which may require an additional source of Ba to the ocean. Although the precipitation pathway is not well constrained, dissolved Ba stored in sulfate-depleted pore-waters below methane hydrates could represent an additional source. We speculate the most complete explanation for early warming and rise in Ba supply is that hydrate dissociation acted as a positive feedback and caused the CIE. This could imply hydrates are more temperature-sensitive than previously considered, and may warrant reconsideration of the political assignment of 2 °C warming as a safe future scenario. |
format |
Other/Unknown Material |
author |
Frieling, Joost Peterse, Francien Lunt, Daniel J Bohaty, Steven M Sinninghe Damsté, Jaap S Reichart, Gert-Jan Sluijs, Appy |
author_facet |
Frieling, Joost Peterse, Francien Lunt, Daniel J Bohaty, Steven M Sinninghe Damsté, Jaap S Reichart, Gert-Jan Sluijs, Appy |
author_sort |
Frieling, Joost |
title |
Barium concentrations and GDGT abundances across the PETM |
title_short |
Barium concentrations and GDGT abundances across the PETM |
title_full |
Barium concentrations and GDGT abundances across the PETM |
title_fullStr |
Barium concentrations and GDGT abundances across the PETM |
title_full_unstemmed |
Barium concentrations and GDGT abundances across the PETM |
title_sort |
barium concentrations and gdgt abundances across the petm |
publisher |
PANGAEA |
publishDate |
2019 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.899283 https://doi.org/10.1594/PANGAEA.899283 |
op_coverage |
MEDIAN LATITUDE: 16.909937 * MEDIAN LONGITUDE: 17.763722 * SOUTH-BOUND LATITUDE: 3.627500 * WEST-BOUND LONGITUDE: -2.735830 * NORTH-BOUND LATITUDE: 53.501750 * EAST-BOUND LONGITUDE: 73.526550 * DATE/TIME START: 1995-01-14T00:00:00 * DATE/TIME END: 1995-01-24T05:30:00 |
long_lat |
ENVELOPE(-2.735830,73.526550,53.501750,3.627500) |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Supplement to: Frieling, Joost; Peterse, Francien; Lunt, Daniel J; Bohaty, Steven M; Sinninghe Damsté, Jaap S; Reichart, Gert-Jan; Sluijs, Appy (2019): Widespread warming before and elevated barium burial during the Paleocene-Eocene Thermal Maximum: evidence for methane hydrate release? Paleoceanography and Paleoclimatology, https://doi.org/10.1029/2018PA003425 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.899283 https://doi.org/10.1594/PANGAEA.899283 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.89928310.1029/2018PA003425 |
_version_ |
1810481703897006080 |