气候变化领域集成服务门户(CCPortal): Climatic and tectonic drivers of late Oligocene Antarctic ice volume

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DOI	10.1038/s41561-022-01025-x
	Climatic and tectonic drivers of late Oligocene Antarctic ice volume
	Duncan, B.; McKay, R.; Levy, R.; Naish, T.; Prebble, J. G.; Sangiorgi, F.; Krishnan, S.; Hoem, F.; Clowes, C.; Jones, T. Dunkley; Gasson, E.; Kraus, C.; Kulhanek, D. K.; Meyers, S. R.; Moossen, H.; Warren, C.; Willmott, V; Ventura, G. T.; Bendle, J.
发表日期	2022
ISSN	1752-0894
EISSN	1752-0908
起始页码	819
结束页码	+
卷号	15 期号:10 页码:11
英文摘要	Cenozoic evolution of the Antarctic ice sheets is thought to be driven primarily by long-term changes in radiative forcing, but the tectonic evolution of Antarctica may also have played a substantive role. While deep-sea foraminiferal oxygen isotope records provide a combined measure of global continental ice volume and ocean temperature, they do not provide direct insights into non-radiative influences on Antarctic Ice Sheet dynamics. Here we present an Antarctic compilation of Cenozoic upper-ocean temperature for the Ross Sea and offshore Wilkes Land, generated by membrane lipid distributions from archaea. We find trends of ocean temperature, atmospheric carbon dioxide and oxygen isotopes largely co-vary. However, this relationship is less clear for the late Oligocene, when high-latitude cooling occurred despite interpretation of oxygen isotopes suggesting global warming and ice-volume loss. We propose this retreat of the West Antarctic Ice Sheet occurred in response to a tectonically driven marine transgression, with warm surface waters precluding marine-based ice-sheet growth. Marine ice-sheet expansion occurred only when ocean temperatures further cooled during the Oligocene-Miocene transition, with cold orbital conditions and low atmospheric carbon dioxide. Our results support a threshold response to atmospheric carbon dioxide, below which Antarctica's marine ice sheets grow, and above which ocean warming exacerbates their retreat. Retreat of the West Antarctic Ice Sheet during the late Oligocene was caused primarily by a tectonically driven marine transgression, according to a compilation of Ross Sea surface temperature estimates throughout the Cenozoic.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000854727400002
来源期刊	NATURE GEOSCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/272543
作者单位	Victoria University Wellington; GNS Science - New Zealand; Utrecht University; Yale University; University of Birmingham; University of Exeter; Texas A&M University System; Texas A&M University College Station; University of Wisconsin System; University of Wisconsin Madison; Utrecht University; Royal Netherlands Institute for Sea Research (NIOZ); University of Kiel; Max Planck Society; Helmholtz Association; Alfred Wegener Institute, Helmholtz Centre for Polar & Marine Research; Saint Marys University - Canada
推荐引用方式 GB/T 7714	Duncan, B.,McKay, R.,Levy, R.,et al. Climatic and tectonic drivers of late Oligocene Antarctic ice volume[J],2022,15(10):11.
APA	Duncan, B..,McKay, R..,Levy, R..,Naish, T..,Prebble, J. G..,...&Bendle, J..(2022).Climatic and tectonic drivers of late Oligocene Antarctic ice volume.NATURE GEOSCIENCE,15(10),11.
MLA	Duncan, B.,et al."Climatic and tectonic drivers of late Oligocene Antarctic ice volume".NATURE GEOSCIENCE 15.10(2022):11.