气候变化领域集成服务门户(CCPortal): West Antarctic ice volume variability paced by obliquity until 400,000 years ago

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DOI	10.1038/s41561-022-01088-w
	West Antarctic ice volume variability paced by obliquity until 400,000 years ago
	Ohneiser, Christian; Hulbe, Christina L. L.; Beltran, Catherine; Riesselman, Christina R. R.; Moy, Christopher M. M.; Condon, Donna B. B.; Worthington, Rachel A. A.
发表日期	2023
ISSN	1752-0894
EISSN	1752-0908
起始页码	44
结束页码	+
卷号	16 期号:1 页码:12
英文摘要	Benthic foraminiferal oxygen isotopic and ice core records have been interpreted to indicate that Antarctic ice volume variations began to be paced by 100,000-year-long eccentricity cycles about 800,000 years ago. However, this interpretation has never been confirmed from sedimentological reconstructions of ice margin advance and retreat cycles around Antarctica. Here we present sedimentological and palaeomagnetic records from a 6.21-metre-long sediment core spanning the last 1.1 million years that track the proximity of the ice margin in the Ross Embayment. The advance and retreat of the Ross Ice Shelf-and by extension the West Antarctic Ice Sheet-are found to have been primarily paced by 41,000-year-long obliquity cycles until at least 400,000 years ago. We suggest that high-latitude insolationcontrolled Southern Ocean heat uptake and continued to be the main pacemaker of Antarctic glaciations well into the late Pleistocene. Insolation was predicted to control Antarctic ice volume; however, the frequency of glacial cycles inferred from distal records suggested that the 100,000-year-long cycle dominated, implying that other forcing mechanisms were at play. Our study reconciles the historical mismatch between the inferred glacial cycles and the insolation record.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000894413900001
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/272498
作者单位	University of Otago; University of Otago; University of Otago
推荐引用方式 GB/T 7714	Ohneiser, Christian,Hulbe, Christina L. L.,Beltran, Catherine,et al. West Antarctic ice volume variability paced by obliquity until 400,000 years ago[J],2023,16(1):12.
APA	Ohneiser, Christian.,Hulbe, Christina L. L..,Beltran, Catherine.,Riesselman, Christina R. R..,Moy, Christopher M. M..,...&Worthington, Rachel A. A..(2023).West Antarctic ice volume variability paced by obliquity until 400,000 years ago.NATURE GEOSCIENCE,16(1),12.
MLA	Ohneiser, Christian,et al."West Antarctic ice volume variability paced by obliquity until 400,000 years ago".NATURE GEOSCIENCE 16.1(2023):12.