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 13C-depleted carbon, reflected in...
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fttriple:oai:gotriple.eu:D_8arKB6SHqsj4OwLM4Xv 2023-05-15T14:02:27+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 https://doi.org/10.5194/cp-7-47-2011 https://cp.copernicus.org/articles/7/47/2011/ en eng Copernicus Publications doi:10.5194/cp-7-47-2011 10670/1.20e3ja 1814-9324 1814-9332 https://cp.copernicus.org/articles/7/47/2011/ other undefined Geographica Helvetica - geography eISSN: 1814-9332 geo envir Other https://vocabularies.coar-repositories.org/resource_types/c_1843/ Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2018 fttriple https://doi.org/10.5194/cp-7-47-2011 2023-01-22T17:39:25Z 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 13C-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 TEX86, 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 TEX86 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 103 – 104 years during this event, a finding comparable to similar studies of PETM successions from the New Jersey Shelf. Article in Journal/Newspaper Antarc* Antarctic Arctic Southern Ocean Unknown Arctic Antarctic Southern Ocean Pacific Climate of the Past 7 1 47 61 |
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geo envir 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 |
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geo envir |
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 13C-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 TEX86, 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 TEX86 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 103 – 104 years during this event, a finding comparable to similar studies of PETM successions from the New Jersey Shelf. |
format |
Article in Journal/Newspaper |
author |
Sluijs, A. Bijl, P. K. Schouten, S. Röhl, U. Reichart, G.-J. Brinkhuis, H. |
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 |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-7-47-2011 https://cp.copernicus.org/articles/7/47/2011/ |
geographic |
Arctic Antarctic Southern Ocean Pacific |
geographic_facet |
Arctic Antarctic Southern Ocean Pacific |
genre |
Antarc* Antarctic Arctic Southern Ocean |
genre_facet |
Antarc* Antarctic Arctic Southern Ocean |
op_source |
Geographica Helvetica - geography eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-7-47-2011 10670/1.20e3ja 1814-9324 1814-9332 https://cp.copernicus.org/articles/7/47/2011/ |
op_rights |
other undefined |
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 |
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1766272730354679808 |