Journal of Paleolimnology 31: 343–361, 2004. # 2004 Kluwer Academic Publishers. Printed in the Netherlands.

• Main Authors: Katharine Guiles Ellis, Henry T. Mullins, William P. Patterson
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 2003
• Subjects: Glacial Lake; Greenland; ice core
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.586.7651; http://sil.usask.ca/Publications_files/Guiles et al. 2004.pdf

Climate change in the northeastern United States has been inferred for the last deglaciation to middle Holocene (16,600 to 6000 calendar years ago) using multi-proxy data (total organic matter, total carbonate content, 18 O calcite and 13 C calcite) from a 5 m long sediment core from Seneca Lake, New York. Much of the regional postglacial warming occurred during the well-known Bolling and Allerod warm periods (14.5 to 13.0 ka), but climate amelioration in the northeastern United States preceded that in Greenland by 2000 years. An Oldest Dryas climate event (15.1 to 14.7 ka) is recognized in Seneca Lake as is a brief Older Dryas (14.1 ka) cold event. This latter cold event correlates with the regional expansion of glacial Lake Iroquois and global meltwater pulse IA. An increase in winter precipitation and a shorter growing season likely characterized the northeastern United States at this time. The Intra-Allerod Cold Period (13.2 ka) is also evident supporting an ‘‘Amphi-Atlantic Oscillation’ ’ at this time. The well-known Younger Dryas cold interval occurred in the northeastern United States between 12.9 and 11.6 ka, consistent with ice core data from Greenland. In the Seneca Lake record, however, the Younger Dryas appears as an asymmetric event characterized by an abrupt, high-amplitude beginning followed by a more gradual recovery. Compared to European records, the Younger Dryas in the northeastern United States was