DOI: 10.1016/j.palaeo.2019.109562
论文题名: The potential for rapid determination of charcoal from wetland sediments using infrared spectroscopy
作者: Cadd H.R. ; Tyler J. ; Tibby J. ; Baldock J. ; Hawke B. ; Barr C. ; Leng M.J.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 310182
出版年: 2020
卷: 542 语种: 英语
英文关键词: FTIR
; Nuclear magnetic resonance
; Palaeoecology
; Partial least squares
; Quaternary
; Stradbroke Island
Scopus关键词: charcoal
; coastal sediment
; FTIR spectroscopy
; infrared spectroscopy
; least squares method
; nuclear magnetic resonance
; paleoecology
; Quaternary
; wetland
; Australia
; North Stradbroke Island
; Queensland
; South Stradbroke Island
英文摘要: Wetland sediments archive information about past terrestrial ecosystem change including variations in fire occurrence and terrestrial carbon fluxes. The charcoal content of sediments is important for understanding past fire regimes, as well as the role this recalcitrant carbon plays in the global carbon cycle. Infrared (IR) spectroscopy provides a rapid, non-destructive and cost effective method for simultaneously analysing numerous organic and inorganic sediment properties. The use of IR spectroscopy is well developed for determining concentrations of total organic carbon (TOC), total nitrogen (TN), biogenic silica and carbonate in lacustrine sediments. In soil science IR spectroscopy is also routinely used to determine charcoal content, however the potential for analysing charcoal content from lacustrine sediments has yet to be investigated. Here we develop IR spectroscopy and partial least squares regressions (PLSR) to predict the charcoal and TOC content of an organic, 130,000 year old sediment sequence from North Stradbroke Island (Minjerribah), Australia. Charcoal concentrations used for model development were derived using both traditional palaeoecological area measures (cm2 g− 1) and solid state 13C nuclear magnetic resonance (13C NMR) of poly-aryl structures. The IR PLSR models yielded significant correlations for the two charcoal methodologies (area measurements, R2 = 0.57, p < .05; 13C NMR, R2 = 0.70, p < .05). We additionally find a very strong, significant, correlation for TOC (R2 = 0.92, p < .05), consistent with previous studies. Hence, IR is a promising tool for determining the charcoal content of lacustrine sediments, particularly for first-order sample screening, as part of a multi-proxy framework. IR spectroscopy can therefore provide a reliable and rapid technique for the initial investigation of fire histories and organic constituents of sedimentary sequences. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158716
Appears in Collections: 气候变化与战略
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作者单位: Department of Earth Sciences, University of Adelaide, North Terrace, South Australia 5005, Australia; Sprigg Geobiology Centre, University of Adelaide, North Terrace, South Australia 5005, Australia; Department of Geography, Environment and Population, University of Adelaide, North Terrace, South Australia 5005, Australia; NERC Isotope Geosciences Facilities, British Geological Survey, Nottingham, NG12 5GG, United Kingdom; Centre for Environmental Geochemistry, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, United Kingdom; CSIRO Agriculture and Food, Locked Bag 2, Glen Osmond, South Australia 5064, Australia
Recommended Citation:
Cadd H.R.,Tyler J.,Tibby J.,et al. The potential for rapid determination of charcoal from wetland sediments using infrared spectroscopy[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2020-01-01,542