气候变化领域集成服务门户(CCPortal): Spatial Fingerprint of Younger Dryas Cooling and Warming in Eastern North America

CCPortal

DOI	10.1029/2020GL090031
	Spatial Fingerprint of Younger Dryas Cooling and Warming in Eastern North America
	Fastovich D.; Russell J.M.; Jackson S.T.; Krause T.R.; Marcott S.A.; Williams J.W.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:22
英文摘要	The Younger Dryas (YD, 12.9–11.7 ka) is the most recent, near-global interval of abrupt climate change with rates similar to modern global warming. Understanding the causes and biodiversity effects of YD climate changes requires determining the spatial fingerprints of past temperature changes. Here we build pollen-based and branched glycerol dialkyl glycerol tetraether-based temperature reconstructions in eastern North America (ENA) to better understand deglacial temperature evolution. YD cooling was pronounced in the northeastern United States and muted in the north central United States. Florida sites warmed during the YD, while other southeastern sites maintained a relatively stable climate. This fingerprint is consistent with an intensified subtropical high during the YD and demonstrates that interhemispheric responses were more complex spatially in ENA than predicted by the bipolar seesaw model. Reduced-amplitude or antiphased millennial-scale temperature variability in the southeastern United States may support regional hotspots of biodiversity and endemism. © 2020. The Authors.
英文关键词	Biodiversity; Global warming; Abrupt climate change; Bipolar seesaw; Eastern north america; Temperature changes; Temperature evolution; Temperature reconstruction; Temperature variability; Younger Dryas; Glycerol; climate change; cooling; global warming; paleotemperature; palynology; proxy climate record; subtropical region; Younger Dryas; Florida [United States]; United States; Florida
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169383
作者单位	Department of Geography, University of Wisconsin-Madison, Madison, WI, United States; Department of Earth, Environmental, and Planetary Sciences, Brown University, Providence, RI, United States; U.S. Geological Survey, Department of the Interior Southwest Climate Science Center, and Department of Geosciences, University of Arizona, Tucson, AZ, United States; Department of Biology, Augsburg University, Minneapolis, MN, United States; Department of Geoscience, University of Wisconsin-Madison, Madison, WI, United States; Center for Climatic Research, University of Wisconsin-Madison, Madison, WI, United States
推荐引用方式 GB/T 7714	Fastovich D.,Russell J.M.,Jackson S.T.,et al. Spatial Fingerprint of Younger Dryas Cooling and Warming in Eastern North America[J],2020,47(22).
APA	Fastovich D.,Russell J.M.,Jackson S.T.,Krause T.R.,Marcott S.A.,&Williams J.W..(2020).Spatial Fingerprint of Younger Dryas Cooling and Warming in Eastern North America.Geophysical Research Letters,47(22).
MLA	Fastovich D.,et al."Spatial Fingerprint of Younger Dryas Cooling and Warming in Eastern North America".Geophysical Research Letters 47.22(2020).