Strength and variability of the Oligocene Southern Ocean surface temperature gradient
Strength and variability of the Oligocene Southern Ocean surface temperature gradient
复制标题
渐新世南大洋表面温度梯度的强度和变化
DOI:
10.1038/s43247-022-00666-5
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发表时间:
2022
影响因子:
7.9
通讯作者:
Bijl, Peter K.
中科院分区:
文献类型:
--
作者:
Hoem, Frida S.;Sauermilch, Isabel;Aleksinski, Adam K.;Huber, Matthew;Peterse, Francien;Sangiorgi, Francesca;Bijl, Peter K.
Large Oligocene Antarctic ice sheets co-existed with warm proximal waters offshore Wilkes Land. Here we provide a broader Southern Ocean perspective to such warmth by reconstructing the strength and variability of the Oligocene Australian-Antarctic latitudinal sea surface temperature gradient. Our Oligocene TEX86-based sea surface temperature record from offshore southern Australia shows temperate (20–29 °C) conditions throughout, despite northward tectonic drift. A persistent sea surface temperature gradient (~5–10 °C) exists between Australia and Antarctica, which increases during glacial intervals. The sea surface temperature gradient increases from ~26 Ma, due to Antarctic-proximal cooling. Meanwhile, benthic foraminiferal oxygen isotope decline indicates ice loss/deep-sea warming. These contrasting patterns are difficult to explain by greenhouse gas forcing alone. Timing of the sea surface temperature cooling coincides with deepening of Drake Passage and matches results of ocean model experiments that demonstrate that Drake Passage opening cools Antarctic proximal waters. We conclude that Drake Passage deepening cooled Antarctic coasts which enhanced thermal isolation of Antarctica.
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影响因子:
4.3
作者:
D. Hutchinson;A. D. de Boer;H. Coxall;R. Caballero;J. Nilsson;M. Baatsen
通讯作者:
M. Baatsen
影响因子:
3.5
作者:
J. Guitián;H. Stoll
通讯作者:
H. Stoll
影响因子:
5.8
作者:
M. Lyle;S. Gibbs;T. C. Moore;D. Rea
通讯作者:
D. Rea
DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
W. Mcintosh
通讯作者:
W. Mcintosh
影响因子:
3.9
作者:
D. Evangelinos;C. Escutia;J. Etourneau;F. Hoem;P. Bijl;W. Boterblom;T. Flierdt;L. Valero;J. Flores;F. Rodríguez-Tovar;F. Jiménez-Espejo;Ariadna Salabarnada;Adrián López‐Quirós
通讯作者:
D. Evangelinos;C. Escutia;J. Etourneau;F. Hoem;P. Bijl;W. Boterblom;T. Flierdt;L. Valero;J. Flores;F. Rodríguez-Tovar;F. Jiménez-Espejo;Ariadna Salabarnada;Adrián López‐Quirós