Hydrogen isotope ratios of palmitic acid in lacustrine sediments record late Quaternary climate variations

Huang, Yongsong; Shuman, Bryan N.; Wang, Yi; Webb, Thompson

doi:10.1130/0091-7613(2002)030<1103:hiropa>2.0.co;2

Cited by 199 publications

(190 citation statements)

References 29 publications

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“…Therefore, higher plant-derived palmitic acid is unlikely to reach the sediment. A dominantly aquatic origin for palmitic acid in lake sediments is further supported by the fact that δD values of this compound found in lake surface sediments track lake water δD values in 33 lakes in the Eastern North America (Huang et al, 2002). Furthermore, the evolution of δD and δ 13 C values for palmitic and behenic acids show comparable trends, distinct from those of triacontanic acid, hence indicating a common reservoir different from those of higher plants both for hydrogen and carbon.…”

Section: Origin Of Palmitic Behenic and Triacontanic Acidsmentioning

confidence: 51%

“…(i) Consistent with surface sediment calibration from eastern North American lakes, δD values of palmitic (δD PA ) and behenic (δD BA ) acids record the lake water isotope ratios (Huang et al, 2002(Huang et al, , 2004Hou et al, 2006). The constant D/H fractionation factor is 0.829 ± 0.014 between palmitic acid and lake waters (Huang et al, 2002) and 0.8681 between behenic acid and lake waters (Hou et al, 2006).…”

Section: Geological Factorsmentioning

confidence: 82%

“…The method for lipid preparation is the same as described in Huang et al (2002) and Hou et al (2006). Two grams of powdered sediment were used for free lipids extraction using an accelerated solvent extractor (ASE200, Dionex) with CH 2 Cl 2 :CH 3 OH (1:1).…”

Section: Sample Collection and Lipid Analysesmentioning

confidence: 99%

“…The δD and δ 13 C measurements of individual fatty acid methyl esters were performed by GC-C-IRMS according to Huang et al (2002) and Hou et al (2006). A Hewlett Packard 6890 GC interfaced to a Finnigan Delta+ XL stable isotope spectrometer through hightemperature pyrolysis and combustion reactors were used for hydrogen and carbon isotopic analysis.…”

Section: Sample Collection and Lipid Analysesmentioning

confidence: 99%

“…As it has recently been shown, the δD values of sedimentary palmitic (nC 16 ) and behenic (nC 22 ) acids as well as short chain n-alkanes capture the δD of meteoric waters (Huang et al, 2002(Huang et al, , 2004Sachse et al, 2004;Hou et al, 2006), that is related to precipitation amount in the tropics (Dansgaard, 1964). The δD of leaf wax lipids produced by land plants, such as triacontanic acid (nC 30 ) and other long chain fatty acids (Eglinton and Hamilton, 1967), although dependent on the δD of meteoric waters (Sachse et al, 2006), is also affected by evaporation and transpiration processes (Sauer et al, 2001;Liu and Huang, 2005).…”

Section: Introductionmentioning

confidence: 99%

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Paleohydrological changes during the last deglaciation in Northern Brazil

Jacob

Huang

Disnar

et al. 2007

Quaternary Science Reviews

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We here report a reconstruction of hydrological balance variations in Northern Brazil for the last 20 ka deduced from the δD values of aquatic and land plant molecules extracted from the sediment infill of Lake Caçó. Our reconstructed precipitation, lake water isotope ratio and evaporation-evapotranspiration isotope effect allow us to obtain an estimate of moisture balance, and, to a lesser extent, precipitation amount and seasonality changes.

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Section: Origin Of Palmitic Behenic and Triacontanic Acidsmentioning

confidence: 51%

Section: Geological Factorsmentioning

confidence: 82%

Section: Sample Collection and Lipid Analysesmentioning

confidence: 99%

Section: Sample Collection and Lipid Analysesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Paleohydrological changes during the last deglaciation in Northern Brazil

Jacob

Huang

Disnar

et al. 2007

Quaternary Science Reviews

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Comparable hydrogen isotopic fractionation of plant leaf wax n‐alkanoic acids in arid and humid subtropical ecosystems

Gao

Zheng

Fraser

et al. 2014

Geochem Geophys Geosyst

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[1] Leaf wax hydrogen isotope proxies have been widely used to reconstruct past hydrological changes. However, published reconstructions have given little consideration for the potentially variable hydrogen isotopic fractionation relative to precipitation (e wax-p ) under different climate and environmental settings. Chief among various potential factors controlling fractionation is relative humidity, which is known to strongly affect oxygen isotopic ratios of plant cellulose, but its effect on hydrogen isotopic fractionation of leaf waxes is still ambiguous. Analyses of lake surface sediments and individual modern plants have provided valuable information on the variability of e wax-p , but both approaches have significant limitations. Here, we present an alternative method to obtain the integrated, time-resolved ecosystem-level e wax-p values, by analyzing modern aerosol samples collected weekly from arid (Arizona lowlands) and humid subtropical (Atlanta, Georgia) environments during the main growth season. Because aerosol samples mainly reflect regional leaf wax resources, the extreme contrast in the hydroclimate and associated vegetation assemblages between our study sites allows us to rigorously assess the impact of relative humidity and associated vegetation assemblages on leaf wax hydrogen isotopic fractionation. We show there is only minor difference (mostly <10&) in the mean e wax-p values in the two end-member environments. One possible explanation is that the positive isotopic effects of low relative humidity are offset by progressive replacement of trees with grasses that have a more negative apparent fractionation. Our results represent an important step toward quantitative interpretation of leaf wax hydrogen isotopic records.

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Leaf Wax Lipid Extraction for Archaeological Applications

2020

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Plant wax lipid molecules, chiefly normal (n‐) alkanes and n‐alkanoic acids, are frequently used as proxies for understanding paleoenvironmental and paleoclimatic change. These are regularly analyzed from marine and lake sediments and even more frequently in archaeological contexts, enabling the reconstruction of past environments in direct association with records of past human behavior. Carbon and hydrogen isotope measurements of these compounds are used to trace plant type and water‐use efficiency, relative paleotemperature, precipitation, evapotranspiration of leaf and soil moisture, and other physiological and ecological parameters. Plant wax lipids have great potential for answering questions related to human‐environment interactions, being for the most part chemically inert and easily recoverable in terrestrial sediments, including those dating back millions of years. The growing use of this technique, and comparison of such data with other paleoenvironmental proxies such as pollen and phytolith analysis and soil carbonate and tooth enamel isotope records, make it essential to establish consistent, best‐practice protocols for extracting n‐alkanes and n‐alkanoic acids from archaeological sediments to provide comparable information for interpreting past climatic, ecosystem, and hydrological changes and their interaction with human societies. © 2020 The Authors. Basic Protocol 1: Total lipid extraction Support Protocol 1: Weighing the total lipid extract Support Protocol 2: Cleaning the PSE extraction cells Alternate Protocol 1: Soxhlet total lipid extraction Alternate Protocol 2: Ultrasonic total lipid extraction Basic Protocol 2: Separation of lipids by aminopropyl column chromatography Basic Protocol 3: Separation of lipids by silver‐nitrate‐infused silica gel column chromatography Support Protocol 3: Preparation of silica gel infused with 10% silver nitrate Basic Protocol 4: Methylation of n‐alkanoic acids Basic Protocol 5: Gas chromatography mass spectrometry (GC‐MS) Basic Protocol 6: Gas chromatography isotope ratio mass spectrometry (GC‐IRMS)

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Hydrogen isotope ratios of palmitic acid in lacustrine sediments record late Quaternary climate variations

Cited by 199 publications

References 29 publications

Paleohydrological changes during the last deglaciation in Northern Brazil

Paleohydrological changes during the last deglaciation in Northern Brazil

Comparable hydrogen isotopic fractionation of plant leaf wax n‐alkanoic acids in arid and humid subtropical ecosystems

Leaf Wax Lipid Extraction for Archaeological Applications

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