气候变化领域集成服务门户(CCPortal): Stable source of Holocene spring precipitation recorded in leaf wax hydrogen-isotope ratios from two New York lakes

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DOI	10.1016/j.quascirev.2020.106357
	Stable source of Holocene spring precipitation recorded in leaf wax hydrogen-isotope ratios from two New York lakes
	Schartman A.K.; Diefendorf A.F.; Lowell T.V.; Freimuth E.J.; Stewart A.K.; Landis J.D.; Bates B.R.
发表日期	2020
ISSN	0277-3791
卷号	240
英文摘要	Changes in synoptic atmospheric circulation patterns are thought to play a role in establishing millennial scale climate periods during the end of the late glacial and the Holocene. In the northeastern United States, multi-proxy evidence documents fluctuations in effective moisture and temperatures for this time period, but constraining the relationship between atmospheric processes and these climate regimes is not straightforward. Because the hydrogen-isotope ratios of sedimentary terrestrial leaf waxes can reflect precipitation δD, these long-chain hydrocarbon compounds are an excellent tool to investigate moisture sourcing. Here we present lake sediment and leaf wax carbon- and hydrogen-isotope records that span the past ∼14.0 thousand years from Heart Lake and Moose Pond in the Adirondack Mountains (ADK), New York. High initial lake productivity after basin inception is reflected in low C:N ratios (<15), and higher relative short chain n-alkane (n-C17, n-C19, and n-C21) to long chain n-alkane (n-C27, n-C29 and n-C31) concentration ratios. The Holocene record is characterized by low bulk and n-alkane δ13C (∼ −28‰, ∼ −31‰, respectively), high ACL25-35 (∼28), and high relative concentrations of long chain n-alkane homologues, indicating a dominantly terrestrial source of organic matter for this time period. Hydrogen-isotope ratios of n-C29 n-alkane from both lake basins range only ∼20‰ through the Holocene and reconstructed precipitation δD (δDprecip) from both basins is in good agreement with that of modern modeled spring precipitation. This suggests there may have been no major changes in the sourcing of spring precipitation for the ADK throughout the time of record. © 2020 Elsevier Ltd
英文关键词	Holocene; Hydrogen isotopes; Late glacial; Leaf wax; North America; Organic geochemistry; Paleoclimatology; Precipitation sourcing
语种	英语
scopus关键词	Hydrocarbons; Hydrogen; Isotopes; Lakes; Moisture; Springs (components); Adirondack Mountains; Atmospheric circulation patterns; Carbon and hydrogens; Long chain hydrocarbons; Long chain n-alkanes; Multi-proxy evidences; Relative concentration; Spring precipitation; Paraffins; atmospheric circulation; carbon isotope; Holocene; hydrocarbon; hydrogen isotope; lacustrine deposit; late glacial; synoptic meteorology; wax; New York [United States]; 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/151437
作者单位	Department of Geology, University of Cincinnati, Cincinnati, OH 45221, United States; Department of Geology, St. Lawrence University, Canton, NY 13617, United States; Department of Earth Sciences, Dartmouth College, Hanover, NH 03755-3571, United States
推荐引用方式 GB/T 7714	Schartman A.K.,Diefendorf A.F.,Lowell T.V.,et al. Stable source of Holocene spring precipitation recorded in leaf wax hydrogen-isotope ratios from two New York lakes[J],2020,240.
APA	Schartman A.K..,Diefendorf A.F..,Lowell T.V..,Freimuth E.J..,Stewart A.K..,...&Bates B.R..(2020).Stable source of Holocene spring precipitation recorded in leaf wax hydrogen-isotope ratios from two New York lakes.Quaternary Science Reviews,240.
MLA	Schartman A.K.,et al."Stable source of Holocene spring precipitation recorded in leaf wax hydrogen-isotope ratios from two New York lakes".Quaternary Science Reviews 240(2020).