THE PREBOREAL OSCILLATION IN EASTERN NORTH AMERICA

CWYNAR, Les C.¹, SPEAR, R.W.², VINCENT, J.¹ and KUREK, J.¹, (1)Department of Biology, Univ of New Brunswick, Fredericton, NB E3B 6E1, Canada, (2)Department of Biology, State Univ of New York, Geneseo, NY 14454, cwynar@unb.ca

The Preboreal Oscillation is a short-lived (~200 yr) cooling that occurred early in the Holocene, centered at about 9600 yr BP (uncalibrated 14C yr). Originally discovered in NW Europe and well-documented in the Greenland ice cores and some North Atlantic marine records, there is scant evidence for it in eastern North America (Yu & Eicher, Science 282: 2235-2238). We have analyzed cores of lake sediment from Maritime Canada and the White Mountains of New Hampshire for their organic content, and used chironomid analysis to reconstruct past maximum lake-water temperatures. These analyses demonstrate the occurrence of the Preboreal Oscillation across this region.

Session No. 21

T2. Paleolimnological Records of Holocene Climate Change I

Tuesday, 13 March 2001: 8:15 AM-12:15 PM

Geological Society of America Abstracts with Programs. Vol. 33, No. 1, February 2001

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Northeastern Section - 36th Annual Meeting (March 12-14, 2001)

THE PREBOREAL OSCILLATION IN EASTERN NORTH AMERICA