@article {2845,
	title = {Stable source of Holocene spring precipitation recorded in leaf wax hydrogen-isotope ratios from two New York lakes},
	journal = {Quaternary Science Reviews},
	volume = {240},
	year = {2020},
	month = {Jan-07-2020},
	pages = {106357},
	abstract = {Changes in synoptic atmospheric circulation patterns are thought to play a role in establishing millennial scale climate periods during the end of the late glacial and the Holocene. In the northeastern United States, multi-proxy evidence documents fluctuations in effective moisture and temperatures for this time period, but constraining the relationship between atmospheric processes and these climate regimes is not straightforward. Because the hydrogen-isotope ratios of sedimentary terrestrial leaf waxes can reflect precipitation δD, these long-chain hydrocarbon compounds are an excellent tool to investigate moisture sourcing. Here we present lake sediment and leaf wax carbon- and hydrogen-isotope records that span the past \~{}14.0 thousand years from Heart Lake and Moose Pond in the Adirondack Mountains (ADK), New York. High initial lake productivity after basin inception is reflected in low C:N ratios (<15), and higher relative short chain n-alkane (n-C17, n-C19, and n-C21) to long chain n-alkane (n-C27, n-C29 and n-C31) concentration ratios. The Holocene record is characterized by low bulk and n-alkane δ13C (\~{} -28{\textperthousand}, \~{} -31{\textperthousand}, respectively), high ACL25-35 (\~{}28), and high relative concentrations of long chain n-alkane homologues, indicating a dominantly terrestrial source of organic matter for this time period. Hydrogen-isotope ratios of n-C29 n-alkane from both lake basins range only \~{}20{\textperthousand} through the Holocene and reconstructed precipitation δD (δDprecip) from both basins is in good agreement with that of modern modeled spring precipitation. This suggests there may have been no major changes in the sourcing of spring precipitation for the ADK throughout the time of record.},
	keywords = {Holocene, Hydrogen isotopes, late glacial, Leaf wax, North America, Organic geochemistry, paleoclimatology, Precipitation sourcing},
	issn = {02773791},
	doi = {10.1016/j.quascirev.2020.106357},
	url = {https://linkinghub.elsevier.com/retrieve/pii/S027737912030319X},
	author = {Schartman, Anna K. and Diefendorf, Aaron F. and Lowell, Thomas V. and Freimuth, Erika J. and Stewart, Alexander K. and Landis, Joshua D. and Bates, Benjamin R.}
}
@article {2529,
	title = {Holocene climate and environmental history of East Greenland inferred from lake sediments},
	journal = {Journal of Paleolimnology},
	volume = {57},
	year = {2017},
	month = {Jan-04-2017},
	pages = {321 - 341},
	abstract = {Prediction of future Arctic climate and environmental changes, as well as associated ice-sheet behavior, requires placing present-day warming and reduced ice extent into a long-term context. Here we present a record of Holocene climate and glacier fluctuations inferred from the paleolimnology of small lakes near Istorvet ice cap in East Greenland. Calibrated radiocarbon dates of organic remains indicate deglaciation of the region before ~10,500 years BP, after which time the ice cap receded rapidly to a position similar to or less extensive than present, and lake sediments shifted from glacio-lacustrine clay to relatively organic-rich gyttja. The lack of glacio-lacustrine sediments throughout most of the record suggests that the ice cap was similar to or smaller than present throughout most of the Holocene. This restricted ice extent suggests that climate was similar to or warmer than present, in keeping with other records from Greenland that indicate a warm early and middle Holocene. Middle Holocene magnetic susceptibility oscillations, with a ~200-year frequency in one of the lakes, may relate to solar influence on local catchment processes. Following thousands of years of restricted extent, Istorvet ice cap advanced to within 365 m of its late Holocene limit at ~AD 1150. Variability in the timing of glacial and climate fluctuations, as well as of sediment organic content changes among East Greenland lacustrine records, may be a consequence of local factors, such as elevation, continentality, water depth, turbidity, and seabirds, and highlights the need for a detailed spatial array of datasets to address questions about Holocene climate change.},
	keywords = {De Vries cycle, Glacially fed lakes, Greenland, Holocene, Paleoclimate},
	issn = {0921-2728},
	doi = {10.1007/s10933-017-9951-5},
	url = {http://link.springer.com/10.1007/s10933-017-9951-5},
	author = {Lusas, Amanda R. and Hall, Brenda L. and Lowell, Thomas V. and Kelly, Meredith A. and Bennike, Ole and Levy, Laura B. and Honsaker, William}
}
