Revisiting the Geographical Extent of Exceptional Warmth in the Early Paleogene Southern Ocean
To assess zonal temperature and biogeographical patterns in the Southern Ocean during the Paleogene, we present new multi-proxy air- and sea-surface temperature data for the latest Paleocene (∼57–56 Ma) and the Paleocene-Eocene Thermal Maximum (PETM; ∼56 Ma) from the northern margin of the Australo-...
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2023
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ftunivutrecht:oai:dspace.library.uu.nl:1874/427466 2023-07-23T04:15:47+02:00 Revisiting the Geographical Extent of Exceptional Warmth in the Early Paleogene Southern Ocean Frieling, J. Bohaty, S. M. Cramwinckel, M. J. Gallagher, S. J. Holdgate, G. R. Reichgelt, T. Peterse, F. Pross, J. Sluijs, A. Bijl, P. K. Stratigraphy and paleontology Organic geochemistry Marine palynology and palaeoceanography Stratigraphy & paleontology 2023-03 application/pdf https://dspace.library.uu.nl/handle/1874/427466 en eng 2572-4517 https://dspace.library.uu.nl/handle/1874/427466 info:eu-repo/semantics/OpenAccess Article 2023 ftunivutrecht 2023-07-02T03:54:43Z To assess zonal temperature and biogeographical patterns in the Southern Ocean during the Paleogene, we present new multi-proxy air- and sea-surface temperature data for the latest Paleocene (∼57–56 Ma) and the Paleocene-Eocene Thermal Maximum (PETM; ∼56 Ma) from the northern margin of the Australo-Antarctic Gulf (AAG). The various proxy data sets document the well-known late Paleocene warming and, superimposed, two transient late Paleocene pre-cursor warming events, hundreds of kyr prior to the PETM. Remarkably, temperature reconstructions for the AAG and southwest Pacific during the latest Paleocene, PETM and Early Eocene Climatic Optimum (∼53–49 Ma) show similar trends as well as similar absolute temperatures east and west of the closed Tasmanian Gateway. Our data imply that the exceptional warmth as recorded by previous studies for the southwest Pacific extended westward into the AAG. This contrasts with modeling-derived circulation and temperature patterns. We suggest that simulations of ocean circulation underestimate heat transport in the southwest Pacific due to insufficient resolution, not allowing for mesoscale eddy-related heat transport. We argue for a systematic approach to tackle model and proxy biases that may occur in marginal marine settings and non-analog high-latitude climates to assess the temperature reconstructions. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Utrecht University Repository Antarctic Pacific Southern Ocean |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
description |
To assess zonal temperature and biogeographical patterns in the Southern Ocean during the Paleogene, we present new multi-proxy air- and sea-surface temperature data for the latest Paleocene (∼57–56 Ma) and the Paleocene-Eocene Thermal Maximum (PETM; ∼56 Ma) from the northern margin of the Australo-Antarctic Gulf (AAG). The various proxy data sets document the well-known late Paleocene warming and, superimposed, two transient late Paleocene pre-cursor warming events, hundreds of kyr prior to the PETM. Remarkably, temperature reconstructions for the AAG and southwest Pacific during the latest Paleocene, PETM and Early Eocene Climatic Optimum (∼53–49 Ma) show similar trends as well as similar absolute temperatures east and west of the closed Tasmanian Gateway. Our data imply that the exceptional warmth as recorded by previous studies for the southwest Pacific extended westward into the AAG. This contrasts with modeling-derived circulation and temperature patterns. We suggest that simulations of ocean circulation underestimate heat transport in the southwest Pacific due to insufficient resolution, not allowing for mesoscale eddy-related heat transport. We argue for a systematic approach to tackle model and proxy biases that may occur in marginal marine settings and non-analog high-latitude climates to assess the temperature reconstructions. |
author2 |
Stratigraphy and paleontology Organic geochemistry Marine palynology and palaeoceanography Stratigraphy & paleontology |
format |
Article in Journal/Newspaper |
author |
Frieling, J. Bohaty, S. M. Cramwinckel, M. J. Gallagher, S. J. Holdgate, G. R. Reichgelt, T. Peterse, F. Pross, J. Sluijs, A. Bijl, P. K. |
spellingShingle |
Frieling, J. Bohaty, S. M. Cramwinckel, M. J. Gallagher, S. J. Holdgate, G. R. Reichgelt, T. Peterse, F. Pross, J. Sluijs, A. Bijl, P. K. Revisiting the Geographical Extent of Exceptional Warmth in the Early Paleogene Southern Ocean |
author_facet |
Frieling, J. Bohaty, S. M. Cramwinckel, M. J. Gallagher, S. J. Holdgate, G. R. Reichgelt, T. Peterse, F. Pross, J. Sluijs, A. Bijl, P. K. |
author_sort |
Frieling, J. |
title |
Revisiting the Geographical Extent of Exceptional Warmth in the Early Paleogene Southern Ocean |
title_short |
Revisiting the Geographical Extent of Exceptional Warmth in the Early Paleogene Southern Ocean |
title_full |
Revisiting the Geographical Extent of Exceptional Warmth in the Early Paleogene Southern Ocean |
title_fullStr |
Revisiting the Geographical Extent of Exceptional Warmth in the Early Paleogene Southern Ocean |
title_full_unstemmed |
Revisiting the Geographical Extent of Exceptional Warmth in the Early Paleogene Southern Ocean |
title_sort |
revisiting the geographical extent of exceptional warmth in the early paleogene southern ocean |
publishDate |
2023 |
url |
https://dspace.library.uu.nl/handle/1874/427466 |
geographic |
Antarctic Pacific Southern Ocean |
geographic_facet |
Antarctic Pacific Southern Ocean |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
2572-4517 https://dspace.library.uu.nl/handle/1874/427466 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1772176793840648192 |