气候变化领域集成服务门户(CCPortal): Pervasive Desiccation of North American Lakes During the Late Quaternary

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DOI	10.1029/2019GL086412
	Pervasive Desiccation of North American Lakes During the Late Quaternary
	Liefert D.T.; Shuman B.N.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:3
英文摘要	Sedimentary records of lake-level fluctuations have long provided unambiguous evidence of past hydrologic changes. Here, we synthesize geomorphic and sedimentological evidence of late-Quaternary lake-level changes across North America and show that currently moist regions were commonly drier than today. Many lakes across humid or snow-dominated areas of North America were lower than today or totally desiccated for prolonged periods but rose to their current levels following climate changes in recent millennia. Maps of 173 records show that hydroclimates responded to deglacial dynamics and orbital changes but that regional hydrology changed even under the modest forcing and temperature variability of the past 8,000 years. Submerged paleoshorelines, ubiquitous across humid regions, reveal that North America's ecosystems and critical zone existed in a drier-than-modern state for much of the Quaternary and that continental moisture gradients often differed from today. The hydrologic changes underscore the climatic risk to many societally critical water supplies. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Climate change; Hydrology; Limnology; Water resources; Water supply; hydroclimate; Hydrologic changes; Lake level fluctuations; Paleoclimates; Regional hydrologies; Sedimentary records; Sedimentological evidence; Temperature variability; Lakes; desiccation; hydrology; hydrometeorology; limnology; paleoclimate; Quaternary; water resource; North America
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/170793
作者单位	Department of Geology and Geophysics, University of Wyoming, Laramie, WY, United States
推荐引用方式 GB/T 7714	Liefert D.T.,Shuman B.N.. Pervasive Desiccation of North American Lakes During the Late Quaternary[J],2020,47(3).
APA	Liefert D.T.,&Shuman B.N..(2020).Pervasive Desiccation of North American Lakes During the Late Quaternary.Geophysical Research Letters,47(3).
MLA	Liefert D.T.,et al."Pervasive Desiccation of North American Lakes During the Late Quaternary".Geophysical Research Letters 47.3(2020).