DOI: 10.5194/cp-9-335-2013
Scopus记录号: 2-s2.0-84873922131
论文题名: Modern isotope hydrology and controls on δd of plant leaf waxes at Lake El'gygytgyn, NE Russia
作者: Wilkie K.M.K. ; Chapligin B. ; Meyer H. ; Burns S. ; Petsch S. ; Brigham-Grette J.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2013
卷: 9, 期: 1 起始页码: 335
结束页码: 352
语种: 英语
Scopus关键词: biomarker
; calibration
; diatom
; hydrogen isotope
; ice cover
; isotopic analysis
; isotopic composition
; isotopic ratio
; lacustrine deposit
; lipid
; paleoclimate
; paleohydrology
; precipitation (climatology)
; reconstruction
; sediment core
; silica
; wax
; Chukchi
; Elgygytgyn Lake
; Russian Federation
英文摘要: Stable isotope data from lipid biomarkers and diatom silica recovered from lake sediment cores hold great promise for paleoclimate and paleohydrological reconstructions. However, these records rely on accurate calibration with modern precipitation and hydrologic processes and only limited data exist on the controls on the -D values for nalkanoic acids from plant leaf waxes. Here we investigate the stable isotopic composition of modern precipitation, streams, lake water and ice cover, and use these data to constrain isotope systematics of the Lake El'gygytgyn Basin hydrology. Compound-specific hydrogen isotope ratios determined from n-alkanoic acids from modern vegetation are compared with modern precipitation and lake core top sediments. Multispecies net (apparent) fractionation values between source water (precipitation) and modern vegetation (e.g., quot;wax/precip mean value is ?107±12 ) agree with previous results and suggest a consistent offset between source waters and the -D values of alkanoic acids. We conclude that although there may be some bias towards a winter precipitation signal, overall -D values from leaf wax n-alkanoic acids record annual average precipitation within the El'gygytgyn Basin. A net fractionation calculated for 200-yr-integrated lake sediments yields quot;30/precip = ?968and can provide robust net "apparent" fractionation to be used in future paleohydrological reconstructions. © Author(s) 2013. CC Attribution 3.0 License. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49478
Appears in Collections: 气候变化与战略
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Recommended Citation:
Wilkie K.M.K.,Chapligin B.,Meyer H.,et al. Modern isotope hydrology and controls on δd of plant leaf waxes at Lake El'gygytgyn, NE Russia[J]. Climate of the Past,2013-01-01,9(1)