气候变化领域集成服务门户(CCPortal): Lake sediment records of Holocene hydroclimate and impacts of the Mount Mazama eruption; north-central Washington; USA

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DOI	10.1016/j.quascirev.2018.09.018
	Lake sediment records of Holocene hydroclimate and impacts of the Mount Mazama eruption; north-central Washington; USA
	Steinman B.A.; Nelson D.B.; Abbott M.B.; Stansell N.D.; Finkenbinder M.S.; Finney B.P.
发表日期	2019
ISSN	0277-3791
起始页码	17
结束页码	36
卷号	204
英文摘要	Multi-proxy sediment records from Castor Lake and Scanlon Lake, north-central Washington, provide a late Quaternary perspective on lake/catchment hydrologic and ecosystem responses to climate change and the Mazama volcanic ashfall event. Analyses of authigenic carbonate mineral oxygen and carbon isotope values, organic carbon and nitrogen content, and sedimentological facies were conducted on sediment from Castor Lake in order to reconstruct lake/catchment hydrologic balance, the source and abundance of organic matter, and variations in lake level. Sedimentary facies characterization was conducted on the Scanlon Lake sediment in order to provide supporting evidence for the lake-level shifts inferred from the Castor Lake data. Marked changes in Castor Lake proxy values occur from 12,860 to 11,440 calendar years before present (yr BP), suggesting lake/catchment responses to the Younger Dryas cold reversal including higher lake levels, substantial variability in productivity, and increased catchment erosion. High δ18O values at 9630 yr BP indicate that lake levels were lower than at present and that the early Holocene was dry. Sedimentological analyses and δ18O data demonstrate that subsequent to the Mazama climactic eruption (∼7600 yr BP), a transition to the lowest lake levels of the Holocene occurred over several centuries, with maximum δ18O values at 7290 (90% uncertainty range: 7020–7500) yr BP and low lake levels persisting until 6190 (5960–6410) yr BP. Lithological changes in the Scanlon Lake record support these inferences. The lowest δ18O values of the Holocene occur in sediment from ∼5000 yr BP, indicating high lake levels at this time, after which a secular trend toward higher δ18O values and lower lake levels occurred. The prolonged lowstand in the centuries following the Mazama eruption suggests that catchment hydrologic characteristics were strongly impacted by the ashfall through effects on soil water retention capacity, that similar responses may have occurred in comparable settings within the Mazama ashfall zone, and that such volcanic events have the potential confound the climate signal in lake sediment records. Were a similar event to happen in the future, catchment hydrology, stream/river discharge, and lake/catchment ecosystem dynamics could be affected for centuries. © 2018 Elsevier Ltd
语种	英语
scopus关键词	Catchments; Climate change; Ecosystems; Lithology; Organic carbon; Runoff; Sediments; Soil moisture; Uncertainty analysis; Volcanoes; Abundance of organic matters; Authigenic carbonates; Carbon and nitrogen; Catchment hydrology; Lake-sediment records; Lithological changes; Sedimentological analysis; Soil water retention; Lakes; carbon isotope; climate signal; ecosystem dynamics; Holocene; lacustrine deposit; lowstand; organic carbon; organic nitrogen; paleoenvironment; proxy climate record; volcanic ash; volcanic eruption; Younger Dryas; Aisen; Cascade Range; Chile; Lake Castor; Mount Mazama; Oregon; United States; Washington [United States]; Mazama
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/152061
作者单位	Department of Earth and Environmental Sciences and Large Lakes Observatory, University of Minnesota Duluth, Duluth, MN, United States; University of Basel, Department of Environmental Sciences – Botany, Schönbeinstrasse 6, Basel, 4056, Switzerland; Department of Geology and Environmental Science, University of Pittsburgh, Pittsburgh, PA, United States; Department of Geology and Environmental Geosciences, Northern Illinois University, De Kalb, IL, United States; Department of Environmental Engineering and Earth Sciences, Wilkes University, Wilkes-Barre, PA, United States; Department of Geosciences and Department of Biological Sciences, Idaho State University, Pocatello, ID, United States
推荐引用方式 GB/T 7714	Steinman B.A.,Nelson D.B.,Abbott M.B.,et al. Lake sediment records of Holocene hydroclimate and impacts of the Mount Mazama eruption; north-central Washington; USA[J],2019,204.
APA	Steinman B.A.,Nelson D.B.,Abbott M.B.,Stansell N.D.,Finkenbinder M.S.,&Finney B.P..(2019).Lake sediment records of Holocene hydroclimate and impacts of the Mount Mazama eruption; north-central Washington; USA.Quaternary Science Reviews,204.
MLA	Steinman B.A.,et al."Lake sediment records of Holocene hydroclimate and impacts of the Mount Mazama eruption; north-central Washington; USA".Quaternary Science Reviews 204(2019).