气候变化领域集成服务门户(CCPortal): Decadal warming events extended into central North America during the last glacial period

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DOI	10.1038/s41561-023-01132-3
	Decadal warming events extended into central North America during the last glacial period
	Batchelor, C. J.; Marcott, S. A.; Orland, I. J.; He, F.; Edwards, R. L.
发表日期	2023
ISSN	1752-0894
EISSN	1752-0908
起始页码	257
结束页码	+
卷号	16 期号:3 页码:13
英文摘要	The connection between abrupt high-latitude warming during the last glacial period-Dansgaard-Oeschger (DO) events-and rapid climate changes at lower latitudes has revealed inter-hemispheric teleconnections in the ocean-atmosphere system. Links between DO events and climate variability in mid-latitude, mid-continent settings remain, however, poorly understood, especially in North America where climate archives with sufficient time resolution are scarce. Here we examine a speleothem that grew from similar to 70-50 thousand years ago (ka) in Wisconsin (United States) and combine fluorescent imaging of its growth banding with an annual-resolution oxygen isotope (delta O-18) record. Eight large (2.0-3.0 parts per thousand) negative delta O-18 excursions, each with an onset in <10 annual growth bands, occur between 61-55 ka, when DO events 17-14 are recorded in the ice core of the North Greenland Ice Core Project. Although the age model does not allow these delta O-18 excursions to be matched to specific DO events, their magnitude and rapid onset support a credible link. Isotope-enabled climate simulations suggest that abrupt DO warming would increase the delta O-18 of annual precipitation in the study area and corroborate that warming of >10 degrees C in <10 years is thus required to produce the observed negative delta O-18 excursions. Our findings of expansive abrupt DO warming in central North America has implications for environmental, climate and ice sheet dynamics.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000942760500005
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/272439
作者单位	University of Wisconsin System; University of Wisconsin Madison; University of Wisconsin System; University of Wisconsin Madison; University of Wisconsin System; University of Wisconsin Madison; University of Minnesota System; University of Minnesota Twin Cities
推荐引用方式 GB/T 7714	Batchelor, C. J.,Marcott, S. A.,Orland, I. J.,et al. Decadal warming events extended into central North America during the last glacial period[J],2023,16(3):13.
APA	Batchelor, C. J.,Marcott, S. A.,Orland, I. J.,He, F.,&Edwards, R. L..(2023).Decadal warming events extended into central North America during the last glacial period.NATURE GEOSCIENCE,16(3),13.
MLA	Batchelor, C. J.,et al."Decadal warming events extended into central North America during the last glacial period".NATURE GEOSCIENCE 16.3(2023):13.