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A multi-proxy reconstruction of climate during the late-Pleistocene to early Holocene transition in the northeastern, USA

Published online by Cambridge University Press:  12 March 2021

Laurie D. Grigg Open the ORCID record for Laurie D. Grigg [Opens in a new window] ,
Kevin J. Engle ,
Alison J. Smith ,
Bryan N. Shuman  and
Maximilian B. Mandl
Laurie D. Grigg*
Affiliation:
Department of Earth and Environmental Sciences, Norwich University, Northfield, Vermont 05663
Kevin J. Engle
Affiliation:
Department of Geology, Kent State University, Kent, Ohio44242,
Alison J. Smith
Affiliation:
Department of Geology, Kent State University, Kent, Ohio44242,
Bryan N. Shuman
Affiliation:
Department of Geology and Geophysics, Laramie, Wyoming82071
Maximilian B. Mandl
Affiliation:
ETH Zürich, Institut für Geochemie und Petrologie, 8092 Zurich, Switzerland
*
*Corresponding author at: Department of Earth and Environmental Sciences, Norwich University, 158 Harmon Drive, Northfield, Vermont05663. E-mail address: [email protected] (L.D. Grigg).
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Abstract

A multiproxy record from Twin Ponds, VT, is used to reconstruct climatic variability during the late Pleistocene to early Holocene transition. Pollen, ostracodes, δ18O, and lithologic records from 13.5 to 9.0 cal ka BP are presented. Pollen- and ostracode-inferred climatic reconstructions are based on individual species’ environmental preferences and the modern analog technique. Principal components analysis of all proxies highlights the overall warming trend and centennial-scale climatic variability. During the Younger Dryas cooling event (YD), multiple proxies show evidence for cold winter conditions and increasing seasonality after 12.5 cal ka BP. The early Holocene shows an initial phase of rapid warming with a brief cold interval at 11.5 cal ka BP, followed by a more gradual warming; a cool, wet period from 11.2 to 10.8 cal ka BP; and cool, dry conditions from 10.8 to 10.2 cal ka BP. The record ends with steady warming and increasing moisture. Post-YD climatic variability has been observed at other sites in the northeastern United States and points to continued instability in the North Atlantic during the final phases of deglaciation.

Keywords

PollenOstracodesOxygen isotopesVermontNortheastLate glacialEarly HoloceneYounger Dryas
Type
Research Article
Information
Quaternary Research , Volume 102 , July 2021 , pp. 188 - 204
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Copyright
Copyright © University of Washington. Published by Cambridge University Press, 2021

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