Southern ocean warming, sea level and hydrological change during the Paleocene-Eocene thermal maximum
A brief (~150 kyr) period of widespread global average surface warming marks the transition between the Paleocene and Eocene epochs, ~56 million years ago. This so-called "Paleocene-Eocene thermal maximum" (PETM) is associated with the massive injection of 13 C-depleted carbon, reflected i...
Published in: | Climate of the Past |
---|---|
Main Authors: | , , , , , |
Format: | Other/Unknown Material |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | https://doi.org/10.5194/cp-7-47-2011 https://cp.copernicus.org/articles/7/47/2011/ |
id |
ftcopernicus:oai:publications.copernicus.org:cp8501 |
---|---|
record_format |
openpolar |
spelling |
ftcopernicus:oai:publications.copernicus.org:cp8501 2023-05-15T13:36:36+02:00 Southern ocean warming, sea level and hydrological change during the Paleocene-Eocene thermal maximum Sluijs, A. Bijl, P. K. Schouten, S. Röhl, U. Reichart, G.-J. Brinkhuis, H. 2018-09-27 info:eu-repo/semantics/application/pdf https://doi.org/10.5194/cp-7-47-2011 https://cp.copernicus.org/articles/7/47/2011/ eng eng info:eu-repo/grantAgreement/EC/FP7/259627 doi:10.5194/cp-7-47-2011 https://cp.copernicus.org/articles/7/47/2011/ info:eu-repo/semantics/openAccess eISSN: 1814-9332 info:eu-repo/semantics/Text 2018 ftcopernicus https://doi.org/10.5194/cp-7-47-2011 2020-07-20T16:26:14Z A brief (~150 kyr) period of widespread global average surface warming marks the transition between the Paleocene and Eocene epochs, ~56 million years ago. This so-called "Paleocene-Eocene thermal maximum" (PETM) is associated with the massive injection of 13 C-depleted carbon, reflected in a negative carbon isotope excursion (CIE). Biotic responses include a global abundance peak (acme) of the subtropical dinoflagellate Apectodinium . Here we identify the PETM in a marine sedimentary sequence deposited on the East Tasman Plateau at Ocean Drilling Program (ODP) Site 1172 and show, based on the organic paleothermometer TEX 86 , that southwest Pacific sea surface temperatures increased from ~26 °C to ~33°C during the PETM. Such temperatures before, during and after the PETM are >10 °C warmer than predicted by paleoclimate model simulations for this latitude. In part, this discrepancy may be explained by potential seasonal biases in the TEX 86 proxy in polar oceans. Additionally, the data suggest that not only Arctic, but also Antarctic temperatures may be underestimated in simulations of ancient greenhouse climates by current generation fully coupled climate models. An early influx of abundant Apectodinium confirms that environmental change preceded the CIE on a global scale. Organic dinoflagellate cyst assemblages suggest a local decrease in the amount of river run off reaching the core site during the PETM, possibly in concert with eustatic rise. Moreover, the assemblages suggest changes in seasonality of the regional hydrological system and storm activity. Finally, significant variation in dinoflagellate cyst assemblages during the PETM indicates that southwest Pacific climates varied significantly over time scales of 10 3 – 10 4 years during this event, a finding comparable to similar studies of PETM successions from the New Jersey Shelf. Other/Unknown Material Antarc* Antarctic Arctic Southern Ocean Copernicus Publications: E-Journals Antarctic Arctic Pacific Southern Ocean Climate of the Past 7 1 47 61 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
A brief (~150 kyr) period of widespread global average surface warming marks the transition between the Paleocene and Eocene epochs, ~56 million years ago. This so-called "Paleocene-Eocene thermal maximum" (PETM) is associated with the massive injection of 13 C-depleted carbon, reflected in a negative carbon isotope excursion (CIE). Biotic responses include a global abundance peak (acme) of the subtropical dinoflagellate Apectodinium . Here we identify the PETM in a marine sedimentary sequence deposited on the East Tasman Plateau at Ocean Drilling Program (ODP) Site 1172 and show, based on the organic paleothermometer TEX 86 , that southwest Pacific sea surface temperatures increased from ~26 °C to ~33°C during the PETM. Such temperatures before, during and after the PETM are >10 °C warmer than predicted by paleoclimate model simulations for this latitude. In part, this discrepancy may be explained by potential seasonal biases in the TEX 86 proxy in polar oceans. Additionally, the data suggest that not only Arctic, but also Antarctic temperatures may be underestimated in simulations of ancient greenhouse climates by current generation fully coupled climate models. An early influx of abundant Apectodinium confirms that environmental change preceded the CIE on a global scale. Organic dinoflagellate cyst assemblages suggest a local decrease in the amount of river run off reaching the core site during the PETM, possibly in concert with eustatic rise. Moreover, the assemblages suggest changes in seasonality of the regional hydrological system and storm activity. Finally, significant variation in dinoflagellate cyst assemblages during the PETM indicates that southwest Pacific climates varied significantly over time scales of 10 3 – 10 4 years during this event, a finding comparable to similar studies of PETM successions from the New Jersey Shelf. |
format |
Other/Unknown Material |
author |
Sluijs, A. Bijl, P. K. Schouten, S. Röhl, U. Reichart, G.-J. Brinkhuis, H. |
spellingShingle |
Sluijs, A. Bijl, P. K. Schouten, S. Röhl, U. Reichart, G.-J. Brinkhuis, H. Southern ocean warming, sea level and hydrological change during the Paleocene-Eocene thermal maximum |
author_facet |
Sluijs, A. Bijl, P. K. Schouten, S. Röhl, U. Reichart, G.-J. Brinkhuis, H. |
author_sort |
Sluijs, A. |
title |
Southern ocean warming, sea level and hydrological change during the Paleocene-Eocene thermal maximum |
title_short |
Southern ocean warming, sea level and hydrological change during the Paleocene-Eocene thermal maximum |
title_full |
Southern ocean warming, sea level and hydrological change during the Paleocene-Eocene thermal maximum |
title_fullStr |
Southern ocean warming, sea level and hydrological change during the Paleocene-Eocene thermal maximum |
title_full_unstemmed |
Southern ocean warming, sea level and hydrological change during the Paleocene-Eocene thermal maximum |
title_sort |
southern ocean warming, sea level and hydrological change during the paleocene-eocene thermal maximum |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-7-47-2011 https://cp.copernicus.org/articles/7/47/2011/ |
geographic |
Antarctic Arctic Pacific Southern Ocean |
geographic_facet |
Antarctic Arctic Pacific Southern Ocean |
genre |
Antarc* Antarctic Arctic Southern Ocean |
genre_facet |
Antarc* Antarctic Arctic Southern Ocean |
op_source |
eISSN: 1814-9332 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/259627 doi:10.5194/cp-7-47-2011 https://cp.copernicus.org/articles/7/47/2011/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-7-47-2011 |
container_title |
Climate of the Past |
container_volume |
7 |
container_issue |
1 |
container_start_page |
47 |
op_container_end_page |
61 |
_version_ |
1766081340056272896 |