DOI: 10.1002/jgrd.50200
论文题名: Constraints on the major sources of dissolved organic carbon in Alpine ice cores from radiocarbon analysis over the bomb-peak period
作者: May B. ; Wagenbach D. ; Hoffmann H. ; Legrand M. ; Preunkert S. ; Steier P.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 8 起始页码: 3319
结束页码: 3327
语种: 英语
英文关键词: Alpine ice core
; biogenic sources
; bomb peak
; dissolved organic carbon
; radiocarbon
Scopus关键词: Bombs (ordnance)
; Carbon dioxide
; Core samples
; Stream flow
; Analytical method
; bomb peak
; Dissolved organic carbon
; Fossil fuel sources
; Ice core
; Ice core records
; radiocarbon
; Radiocarbon analysis
; Ice
; aerosol composition
; air sampling
; atmospheric pollution
; biogenic emission
; dissolved organic carbon
; fossil fuel
; ice core
; pollutant source
; radiocarbon dating
; valley glacier
; Col du Dome
; France
; Haute Savoie
; Rhone-Alpes
英文摘要: Radiocarbon (14C) has proven to be a powerful tool in distinguishing modern and fossil fuel sources contributing to organic aerosols. By applying this concept to ice core records of the dissolved organic carbon (DOC) fraction, we developed a setup dedicated to the extraction of DOC from Alpine ice core samples for 14C microanalysis. With respect to the difficulties and limitations of this analytical method, it is shown that a total process blank mass of (6 ± 3) μgC with a 14C signature of (0.71 ± 0.17) can be obtained, corresponding to a minimum sample size between 200 g for industrial and 800 g for pre-industrial ice. Radiocarbon analyses of eight DOC ice core samples from the high accumulation glacier Col du Dôme (European Alps) were mainly performed over the bomb-peak period. These data, being associated with snow deposition over the summer half-years, show an overall mean fossil contribution of (25 ± 9) %. Adaptation of the DO14C values to the atmospheric 14CO2 record revealed that the biogenic input to ice core DOC is associated with a fast recycling biospheric component, likely linked to a turnover time of less than 3 years. ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63819
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Institut für Umweltphysik, University of Heidelberg, Heidelberg, Germany; CNRS/UJF - Grenoble 1, Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE) UMR 5183, Grenoble, France; Vienna Environmental Research Accelerator (VERA), Fakultät für Physik - Isotopenforschung, Universität Wien, Wien, Austria
Recommended Citation:
May B.,Wagenbach D.,Hoffmann H.,et al. Constraints on the major sources of dissolved organic carbon in Alpine ice cores from radiocarbon analysis over the bomb-peak period[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(8)