de.pangaea.dataset816368 und dataset PANGAEA
info@pangaea.de
https://www.pangaea.de/ information pointOfContact 2026-05-01T00:10:27Z https://doi.pangaea.de/10.1594/PANGAEA.816368 <gco:CharacterString>Eocene cooling linked to early flow across the Tasmanian Gateway</gco:CharacterString> 2013-07-04T14:14:28 publication https://doi.org/10.1594/PANGAEA.816368 Bijl, Peter K
p.k.bijl@uu.nl
https://orcid.org/0000-0002-1710-4012 information author Bendle, James A
J.Bendle@bham.ac.uk
https://orcid.org/0000-0002-6826-8658 information author Bohaty, Steven M
steve.bohaty@geow.uni-heidelberg.de
author Pross, Jörg
Joerg.Pross@geow.uni-heidelberg.de
author Schouten, Stefan
Stefan.Schouten@nioz.nl
author Tauxe, Lisa author Stickley, Catherine E author McKay, Robert M
robert.mckay@vuw.ac.nz
https://orcid.org/0000-0002-5602-6985 information author Röhl, Ursula
uroehl@marum.de
https://orcid.org/0000-0001-9469-7053 information author Olney, M author Sluijs, Appy
A.Sluijs@bio.uu.nl
https://orcid.org/0000-0003-2382-0215 information author Escutia Dotti, Carlota
cescutia@ugr.es
https://orcid.org/0000-0002-4932-8619 information author Brinkhuis, Henk
h.brinkhuis@bio.uu.nl
https://orcid.org/0000-0003-0253-6610 information author Expedition 318 Scientists author PANGAEA
info@pangaea.de
https://www.pangaea.de/ information publisher tableDigital Supplement to: Bijl, Peter K; Bendle, James A; Bohaty, Steven M; Pross, Jörg; Schouten, Stefan; Tauxe, Lisa; Stickley, Catherine E; McKay, Robert M; Röhl, Ursula; Olney, M; Sluijs, Appy; Escutia Dotti, Carlota; Brinkhuis, Henk; Expedition 318 Scientists (2013): Eocene cooling linked to early flow across the Tasmanian Gateway. Proceedings of the National Academy of Sciences of the United States of America, https://doi.org/10.1073/pnas.1220872110 The warmest global temperatures of the past 85 million years occurred during a prolonged greenhouse episode known as the Early Eocene Climatic Optimum (52-50 Ma). The Early Eocene Climatic Optimum terminated with a long-term cooling trend that culminated in continental-scale glaciation of Antarctica from 34 Ma onward. Whereas early studies attributed the Eocene transition from greenhouse to icehouse climates to the tectonic opening of Southern Ocean gateways, more recent investigations invoked a dominant role of declining atmospheric greenhouse gas concentrations (e.g., CO2). However, the scarcity of field data has prevented empirical evaluation of these hypotheses. We present marine microfossil and organic geochemical records spanning the early-to-middle Eocene transition fromthe Wilkes LandMargin, East Antarctica. Dinoflagellate biogeography and sea surface temperature paleothermometry reveal that the earliest throughflow of a westbound Antarctic Counter Current began ca. 49-50 Ma through a southern opening of the Tasmanian Gateway. This early opening occurs in conjunction with the simultaneous onset of regional surface water and continental cooling (2-4 °C), evidenced by biomarker- and pollen-based paleothermometry. We interpret that the westbound flowing current flow across the Tasmanian Gateway resulted in cooling of Antarctic surface waters and coasts, which was conveyed to global intermediate waters through invigorated deep convection in southern high latitudes. Although atmospheric CO2 forcing alone would provide a more uniform middle Eocene cooling, the opening of the Tasmanian Gateway better explains Southern Ocean surface water and global deep ocean cooling in the apparent absence of (sub-) equatorial cooling. completed IODP Integrated Ocean Drilling Program / International Ocean Discovery Program ODP Ocean Drilling Program theme <gco:CharacterString>PANGAEA Project List</gco:CharacterString> 1995-01-01 creation PANGAEA
info@pangaea.de
https://www.pangaea.de/ information pointOfContact copyright copyright CC-BY-3.0: Creative Commons Attribution 3.0 Unported textTable und geoscientificInformation 127.59091 149.92826 -63.31023 -34.39093 1998-11-07T03:30:00 2000-04-26T09:30:00 application/zip unknown https://doi.pangaea.de/10.1594/PANGAEA.816368?format=zip download dataset The data set was checked for completeness, correctness, and consistency of metainformation. Validity of used methods was checked and - if applicable - precision and range of data. Related to <gco:CharacterString>Age and δ¹⁸O analysis relating to Cenozoic greenhouse climatesXXX</gco:CharacterString> 2008-01-01 publication https://doi.org/10.1594/PANGAEA.816367 Zachos, James C
jzachos@ernerald.ucsc.edu
https://orcid.org/0000-0001-8439-1886 information author Dickens, Gerald Roy
DICKENSG@tcd.ie
https://orcid.org/0000-0003-2869-4860 information author Zeebe, Richard E https://orcid.org/0000-0003-0806-8387 information author documentDigital