Stable source of Holocene spring precipitation recorded in leaf wax hydrogen-isotope ratios from two New York lakes

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...

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Bibliographic Details
Published in:Quaternary science reviews 2020-07, Vol.240, p.106357, Article 106357
Main Authors: Schartman, Anna K., Diefendorf, Aaron F., Lowell, Thomas V., Freimuth, Erika J., Stewart, Alexander K., Landis, Joshua D., Bates, Benjamin R.
Format: Article
Language:English
Subjects:
Holocene
Hydrogen isotopes
Late glacial
Leaf wax
North America
Organic geochemistry
Paleoclimatology
Precipitation sourcing
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Summary: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 (
ISSN:0277-3791
1873-457X
DOI:10.1016/j.quascirev.2020.106357