气候变化领域集成服务门户(CCPortal): Late Holocene hydroclimate changes in the eastern Sierra Nevada revealed by a 4600-year paleoproduction record from June Lake; CA

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DOI	10.1016/j.quascirev.2020.106432
	Late Holocene hydroclimate changes in the eastern Sierra Nevada revealed by a 4600-year paleoproduction record from June Lake; CA
	Lyon E.C.; McGlue M.M.; Erhardt A.M.; Kim S.L.; Stone J.R.; Zimmerman S.R.H.
发表日期	2020
ISSN	0277-3791
卷号	242
英文摘要	Well-resolved lake sediment records are key to answering questions about past hydroclimate variability. These questions are particularly relevant in California (USA), where a recent drought stoked fears of water scarcity and caused significant agricultural and other economic losses in this populous state. To contextualize recent and past cycles of aridity, we utilized a Late Holocene lacustrine record from the eastern Sierra Nevada. This study presents geochemical and sedimentological data from June Lake, California to link changes in organic matter production to environmental variability over the last ∼4600 years. The earliest part of our record is characterized by relatively high productivity and wetter conditions than the modern lake system. This interval is followed by a series of distinct and prolonged droughts from ∼3600 to 1700 cal yr BP, an interval that includes the regionally pervasive Late Holocene Dry Period that is recorded in June Lake as enhanced carbonate precipitation and lower primary production. The interval from ∼1700 to 130 cal yr BP, encompassing both the Medieval Climate Anomaly and the Little Ice Age, is characterized by less-frequent droughts and generally high production in a wetter climate. In contrast, sediments of the past 130 years record an abrupt shift to drier conditions, indicated by marked declines in nearly all production indicators. This divergence is likely influenced by anthropogenic warming and suggests that the modern lake system is anomalous with respect to the longer record of change in the basin. © 2020 Elsevier Ltd
英文关键词	Holocene; Lakes; North America; Organic geochemistry; Paleolimnology; Sedimentology; Stable isotopes
语种	英语
scopus关键词	Agricultural robots; Drought; Forestry; Losses; Anthropogenic warming; Carbonate precipitation; Environmental variability; Lake-sediment records; Matter production; Medieval climate anomalies; Primary production; Sedimentological data; Lakes; aridity; divergence; Holocene; hydrometeorology; lacustrine deposit; Little Ice Age; paleoenvironment; precipitation (climatology); California; Sierra Nevada [California]; United States
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151393
作者单位	Earth and Environmental Science, University of Kentucky, Lexington, KY 40506, United States; Department of Geology, Washington and Lee University, Lexington, VA 24450, United States; Department of Life and Environmental Sciences, University of California-Merced, Merced, CA 95343, United States; Department of Earth and Environmental Systems, Indiana State University, Terre Haute, IN 47809, United States; Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, CA 94550, United States
推荐引用方式 GB/T 7714	Lyon E.C.,McGlue M.M.,Erhardt A.M.,et al. Late Holocene hydroclimate changes in the eastern Sierra Nevada revealed by a 4600-year paleoproduction record from June Lake; CA[J],2020,242.
APA	Lyon E.C.,McGlue M.M.,Erhardt A.M.,Kim S.L.,Stone J.R.,&Zimmerman S.R.H..(2020).Late Holocene hydroclimate changes in the eastern Sierra Nevada revealed by a 4600-year paleoproduction record from June Lake; CA.Quaternary Science Reviews,242.
MLA	Lyon E.C.,et al."Late Holocene hydroclimate changes in the eastern Sierra Nevada revealed by a 4600-year paleoproduction record from June Lake; CA".Quaternary Science Reviews 242(2020).