DOI: 10.1016/j.quascirev.2012.10.043
Scopus记录号: 2-s2.0-84881550714
论文题名: Limnological controls on stable isotope records of late-holocene palaeoenvironment change in sw greenland: A paired lake study
作者: Olsen J. ; John Anderson N. ; Leng M.J.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 66 起始页码: 85
结束页码: 95
语种: 英语
英文关键词: Climate
; Environment
; Holocene
; Lakes
; Southwest Greenland
; Stable isotopes
; XRF
Scopus关键词: Climate
; Environment
; Greenland
; Holocenes
; Stable isotopes
; XRF
; Catchments
; Geochemistry
; Isotopes
; Lakes
; environmental change
; gyttja
; Holocene
; isotopic composition
; limnology
; nutrient dynamics
; paleoenvironment
; stable isotope
; Arctic
; Arctic Ocean
; Greenland
英文摘要: Stable isotope records are increasingly being used in palaeoenvironmental studies of Arctic lakes. Here we compare stable isotope and elemental records (δ13C, δ15N, C/N) with high resolution XRF-derived geochemical and colour data from low Arctic lakes (SS1220 and SS85) in southwest Greenland. Lake SS1220 sediments are laminated gyttja whereas SS85 consist of homogeneous gyttja, both records cover the last c. 5000 years. d13C and carbon content suggest that organic matter in both lakes is predominantly autochthonous. The C/N variability, ranging between 11 and 15, is interpreted to be a function of nitrogen deficiency which is further supported by δ15N values (at SS1220) falling close to atmospheric δ15Natmosphere. Although some changes in the geochemical stratigraphies presented here can be related to regional environmental change (i.e. hydrology, effective precipitation, aeolian activity), these effects are filtered through the lake catchments. These changes alter the nutrient supply and hence lake productivity which appear to be the primary controls on the stable isotope data. We suggest that information of past environmental change can only be gained from the stable isotope composition of lake sediments when there is a reasonable understanding of limnological processes, and records may be lake specific. ©2012 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60739
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark; Department of Geography, Loughborough University, Loughborough LE11 3TU, United Kingdom; Department of Geology, University of Leicester, Leicester LE1 7RH, United Kingdom; NERC Isotope Geosciences Laboratory, British Geological Survey, Nottingham, United Kingdom
Recommended Citation:
Olsen J.,John Anderson N.,Leng M.J.. Limnological controls on stable isotope records of late-holocene palaeoenvironment change in sw greenland: A paired lake study[J]. Quaternary Science Reviews,2013-01-01,66