Carbon isotope analyses of n-alkanes in dust from the lower atmosphere over the central eastern Atlantic

Schefuß, Enno; Ratmeyer, Volker; Stuut, Jan‐Berend; Jansen, J H Fred; Damsté, Jaap S. Sinninghe

doi:10.1016/s0016-7037(02)01414-x

Cited by 269 publications

(161 citation statements)

References 55 publications

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“…Changes in the modal chain-length of nalkane distributions have been attributed to differences in growing-season temperatures of the source regions (Simoneit et al 1991a). However, Schefuß et al (2003) suggest a large influence of the regional precipitation regime on the chain-length distributions of leaf-wax lipids, in agreement with their biologic functionality as regulators of the plant moisture balance.…”

Section: Homologous Compound Seriessupporting

confidence: 55%

“…However, certain environmental conditions, such as fog exposure, precipitation regime, aridity and growing-season temperature, may influence the plant or microbial enzymatic mechanisms, shifting the wax composition and, consequently, the aerosol constitution (Schefuß et al 2003). The induced changes may include the cleavage and loss of one or two carbons of the long chain homologues.…”

Section: Geochemical Parameters Diagnostic Ratios and Lipid Source Amentioning

confidence: 99%

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Characterisation of solvent extractable organic constituents in atmospheric particulate matter: an overview

Alves

2008

An. Acad. Bras. Ciênc.

112

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In spite of accounting for 10-70% of the atmospheric aerosol mass, particulate-phase organic compounds are not well characterised, and many aspects of aerosol formation and evolution are still unknown. The growing awareness of the impact of particulate aerosols on climate, and the incompletely recognised but serious effects of anthropogenic constituents on air quality and human health, have conducted to several scientific studies. These investigations have provided information about the behaviour of atmospheric particulate matter and the description of the character of its carbonaceous content. The compilation of such results is important as they append to the emergent global-wide dataset of the organic composition of atmospheric aerosols. The contribution of the major emission sources to regional particulate pollution can be diagnosed by using specific molecular markers. This overview is mainly focused on results obtained with gas chromatography coupled with mass spectrometry, since it is the analytical method of choice in elucidating the solvent-extractable organic compounds in atmospheric particulate matter. A synopsis of the selection of organic tracers and the application of geochemical parameters to the analysis of organic constituents as a tool for source apportionment is shown here. Besides the assessment of current knowledge, this paper also presents the identification of further areas of concern.

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Section: Homologous Compound Seriessupporting

confidence: 55%

Section: Geochemical Parameters Diagnostic Ratios and Lipid Source Amentioning

confidence: 99%

Characterisation of solvent extractable organic constituents in atmospheric particulate matter: an overview

Alves

2008

An. Acad. Bras. Ciênc.

112

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“…It was characteristic of marine lipid biomarkers. The carbon preference index (CPI) of the LCalks, ratio of (nC27 + nC29 + nC31)/(nC26 + nC28 + nC30), ranged from 4 to 13, further supporting evidence that the LCalks were derived from fresh higher plant waxes (Table 2, Schefuß et al, 2003;Wang et al, 2003). The origins of SCalks, in contrast, characterized by nC17 homologue predominance and low CPIs (ratio of (nC15 + nC17 + nC19)/(nC16 + nC18 + nC20)) from 0.3 to 1.1 (0.72 ± 0.23) in the study area, were in agreement with the input from phytoplankton (Bouloubassi et al, 2001).…”

Section: N-alkanesmentioning

confidence: 72%

Sources and preservation of sedimentary organic matter in the Southern Bohai Sea and the Yellow Sea: Evidence from lipid biomarkers

Lin

Wang

Chen

et al. 2014

Marine Pollution Bulletin

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a b s t r a c tThe region of Southern Bohai Sea (SBS) and Yellow Sea (YS) represents one of the best examples of large river-dominated ocean margins. The transport and accumulation of sediments played a primary role in distribution of the lipids in the region and could lead to a preferential accumulation of these more refractory land-based lipids. The spatial distribution of total organic carbon (TOC) matched with the lipid distributions over the shelf, and high TOC presented in the central YS, but TOC burial fluxes decreased from 110 ton/km 2 /yr of SBS to 25-32 ton/km 2 /yr of YS. Good correlations were observed between terrestrial n-alkanes and TOC in the sediments of SBS and northern YS, but they were poor for southern YS, meanwhile higher ratios of nC27 + nC29 + nC31/nC15 + nC17 + nC19 (12 ± 6) were observed in SBS, and lower in YS (2.2 ± 1.0), suggesting the Yellow River discharge was an important source of terrestrial organic matter to the shelf.

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“…Leaf wax n-alkyl 13 C/ 12 C can be interpreted in a manner similar to that for bulk plant tissue, and therefore has also been used to identify shifts in the relative percentage of C 3 and C 4 vegetation in the sedimentary record (e.g., Huang et al, 2000Huang et al, , 2001Freeman and Colorusso, 2001;Schefuß et al, 2003;Tipple and Pagani, 2007). However, such reconstructions, whether at the bulk or biomarker level, are subject to uncertainties as a result of variation in carbon isotope composition among different plants.…”

Section: Introduction Introduction Introduction Introductionmentioning

confidence: 99%

Investigating the carbon isotope composition and leaf wax n-alkane concentration of C3 and C4 plants in Stiffkey saltmarsh, Norfolk, UK

Eley

Dawson

Pedentchouk

2016

Organic Geochemistry

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The carbon isotope composition of terrestrial plants records valuable ecophysiological and palaeoecological information. However, interspecies variability in 13C/12C, at both the bulk and compound-specific (CS) level, requires further exploration across a range of ecosystem types. Here, we present bulk and n-alkane δ13C values, and n-alkane concentrations, from seven plants (C3 and C4) growing in a temperate UK saltmarsh. Inter- and intra-species variation in n-alkane δ13C values among C3 plants ranged from 8‰ (n-C31) to 10‰ (n-C27) across the 2011 and 2012 growing seasons, exceeding variability in bulk tissue (7‰). In contrast, the C4 monocot showed < 2‰ seasonal shifts in bulk and CS values. As a result of the variability in our CS data, we calculate that n-alkane based C3/C4 reconstructions in temperate saltmarshes have a maximum uncertainty of ∼11%. For dicots and succulents, seasonal bulk and CS δ13C trends diverged, while for C3 and C4 monocots, bulk and CS values followed similar temporal patterns. Fractionation between bulk and n-alkane carbon isotope values varied from −4 to −10‰ for C3 plants, and reached −13‰ for the C4 monocot. We explain discrepancies between bulk and n-alkane δ13C values by referring to possible interspecies variation in salinity adaptation, which may influence the partitioning of pyruvate, shifting the isotopic composition of lipid biomarkers. These findings open new avenues for empirical studies to further understand the metabolic processes fractionating carbon during the synthesis of n-alkanes, enhancing interpretation of the biomarker signal from the geological record

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Carbon isotope analyses of n-alkanes in dust from the lower atmosphere over the central eastern Atlantic

Cited by 269 publications

References 55 publications

Characterisation of solvent extractable organic constituents in atmospheric particulate matter: an overview

Characterisation of solvent extractable organic constituents in atmospheric particulate matter: an overview

Sources and preservation of sedimentary organic matter in the Southern Bohai Sea and the Yellow Sea: Evidence from lipid biomarkers

Investigating the carbon isotope composition and leaf wax n-alkane concentration of C3 and C4 plants in Stiffkey saltmarsh, Norfolk, UK

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