气候变化领域集成服务门户(CCPortal): Early Pleistocene East Antarctic temperature in phase with local insolation

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DOI	10.1038/s41561-022-01095-x
	Early Pleistocene East Antarctic temperature in phase with local insolation
	Yan, Yuzhen; Kurbatov, Andrei V. V.; Mayewski, Paul A. A.; Shackleton, Sarah; Higgins, John A. A.
发表日期	2023
ISSN	1752-0894
EISSN	1752-0908
起始页码	50
结束页码	+
卷号	16 期号:1 页码:19
英文摘要	Pleistocene glacial-interglacial cycles are hypothesized to be modulated by Earth's orbital parameters through their influence on the Northern Hemisphere summer insolation. Changes in obliquity-Earth's axial tilt-can explain the 41,000-year glacial cycles in the Early Pleistocene. However, the absence of 19,000- and 23,000-year frequencies corresponding to Earth's precession of the rotation axis from those cycles remains enigmatic. Here we investigate how these orbital forcings may have changed by developing an insolation proxy based on the oxygen-to-nitrogen ratio of gases trapped in ice core samples collected from the Allan Hills Blue Ice Area in East Antarctica. We find that East Antarctic temperature was positively correlated with local, Southern Hemisphere summer insolation in the Early Pleistocene, while this correlation became negative in the late Pleistocene, with only the latter being consistent with the previous findings that Northern Hemisphere insolation paced Antarctic climate. If Early Pleistocene ice volume and local Antarctic temperature co-varied, our result supports the hypothesis that attributes the absence of precession in the 41,000-year glacial cycles to cancellation of precession frequencies in hemispheric ice volume changes that are responding to local insolation, suggesting a more dynamic East Antarctic Ice Sheet in the Early Pleistocene than in the past 800,000 years.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000895640200001
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/272518
作者单位	Princeton University; University of Maine System; University of Maine Orono; University of Maine System; University of Maine Orono
推荐引用方式 GB/T 7714	Yan, Yuzhen,Kurbatov, Andrei V. V.,Mayewski, Paul A. A.,et al. Early Pleistocene East Antarctic temperature in phase with local insolation[J],2023,16(1):19.
APA	Yan, Yuzhen,Kurbatov, Andrei V. V.,Mayewski, Paul A. A.,Shackleton, Sarah,&Higgins, John A. A..(2023).Early Pleistocene East Antarctic temperature in phase with local insolation.NATURE GEOSCIENCE,16(1),19.
MLA	Yan, Yuzhen,et al."Early Pleistocene East Antarctic temperature in phase with local insolation".NATURE GEOSCIENCE 16.1(2023):19.