Modern isotope hydrology and controls on δD of plant leaf waxes at Lake El'gygytgyn, NE Russia
نویسندگان
چکیده
منابع مشابه
Controls on the D/H ratios of plant leaf waxes in an arid ecosystem
The extent to which leaf water D-enrichment (transpiration) and soil water D-enrichment (evaporation) affect the D/H ratio of plant leaf waxes remains a contentious issue, with important implications for paleohydrologic reconstructions. In this study we measure dD values of precipitation (dDp), groundwater (dDgw), plant xylem water (dDxw) and leaf water (dDlw) to understand their impact on the ...
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Hydrogen isotopic ratios of terrestrial plant leaf waxes (δD) have been widely used for paleoclimate reconstructions. However, underlying controls for the observed large variations in leaf wax δD values in different terrestrial vascular plants are still poorly understood, hampering quantitative paleoclimate interpretation. Here we report plant leaf wax and source water δD values from 102 plant ...
متن کاملWhat do microbes encounter at the plant surface? Chemical composition of pea leaf cuticular waxes.
In the cuticular wax mixtures from leaves of pea (Pisum sativum) cv Avanta, cv Lincoln, and cv Maiperle, more than 70 individual compounds were identified. The adaxial wax was characterized by very high amounts of primary alcohols (71%), while the abaxial wax consisted mainly of alkanes (73%). An aqueous adhesive of gum arabic was employed to selectively sample the epicuticular wax layer on pea...
متن کاملOverview and significance of a 250 ka paleoclimate record from El’gygytgyn Crater Lake, NE Russia
Sediment piston cores from Lake El’gygytgyn (67 N, 172 E), a 3.6 million year old meteorite impact crater in northeastern Siberia, have been analyzed to extract a multi-proxy millennial-scale climate record extending to nearly 250 ka, with distinct fluctuations in sedimentological, physical, biochemical, and paleoecological parameters. Five major themes emerge from this research. First the pilo...
متن کاملHydrogen isotope fractionation in leaf waxes in the Alaskan Arctic tundra
Leaf wax hydrogen isotopes (dDwax) are increasingly utilized in terrestrial paleoclimate research. Applications of this proxy must be grounded by studies of the modern controls on dDwax, including the ecophysiological controls on isotope fractionation at both the plant and landscape scales. Several calibration studies suggest a considerably smaller apparent fractionation between source water an...
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ژورنال
عنوان ژورنال: Climate of the Past
سال: 2013
ISSN: 1814-9332
DOI: 10.5194/cp-9-335-2013