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Can sedimentary leaf waxes record D/H ratios of continental precipitation? Field, model, and experimental assessments
Abstract D / H ratios of leaf waxes (δ D wax ) derived from terrestrial plants and preserved in lake sediments can provide important information on past continental hydrology. Ideally, δ D wax can be
Hydrogen isotopic variability in leaf waxes among terrestrial and aquatic plants around Blood Pond, Massachusetts (USA)
The results indicate that inferring precipitation D/H ratios on the basis of sedimentary leaf waxes is only viable when significant vegetation change is absent or can be accounted for isotopically.
Abrupt Holocene climate change as an important factor for human migration in West Greenland
High-resolution records of temperature over the past 5,600 y are presented based on alkenone unsaturation in sediments of two lakes in West Greenland, finding that major temperature changes in the past 4,500 y occurred abruptly, and were coeval in timing with the archaeological records of settlement and abandonment of the Saqqaq, Dorset, and Norse cultures.
Evidence for water use efficiency as an important factor in determining the δD values of tree leaf waxes
D/H ratios of sedimentary leaf waxes can provide useful information about past climate change. However, factors controlling dD values of higher plant leaf waxes (dDwax) are poorly understood. Here we
Long chain alkenones in Greenland lake sediments : Low δ13C values and exceptional abundance
Abstract Long chain alkenones (LCAs) are a key class of biomarkers for certain members of the algal class Prymnesiophyceae (i.e., prymnesiophytes). They are ubiquitous in ocean sediments where they
Mild Little Ice Age and unprecedented recent warmth in an 1800 year lake sediment record from Svalbard
The Arctic region is subject to a great amplitude of climate variability and is currently undergoing large-scale changes due in part to anthropogenic global warming. Accurate projections of future
Reconstruction of glacier variability from lake sediments reveals dynamic Holocene climate in Svalbard
Abstract The Arctic is warming faster than anywhere else on Earth. Holocene proxy time-series are increasingly used to put this amplified response in perspective by understanding Arctic climate
The influence of 14C reservoir age on interpretation of paleolimnological records from the Tibetan Plateau
There is a great deal of controversy regarding the fate of glaciers and ice fields on the Tibetan Plateau in the face of continued anthropogenic global warming. Paleoclimate reconstructions and
Phylogenetic diversity and evolutionary relatedness of alkenone-producing haptophyte algae in lakes: Implications for continental paleotemperature reconstructions
Alkenones have been found in an increasing number of lakes around the world, making them a promising new tool for continental paleoclimate reconstruction. However, individual lakes may harbor
Glacier response to North Atlantic climate variability during the Holocene
Abstract. Small glaciers and ice caps respond rapidly to climate variations, and records of their past extent provide information on the natural envelope of past climate variability. Millennial-scale