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Hudson River Paleoclimate, Sea Level, and Human Impact: A Record From Piermont Marsh, NYA 13.77 meter sediment core from Piermont Marsh, NY (40 00 N, 73 55W) records the local and regional vegetational and foraminiferal history of the Hudson Estuary. The sediments were sampled every 4 cm, which represents a decadal to centuryscale resolution. Basal sediment dating is in progress, and the 11-m depth represents about 4000 years. Changes in plant macrofossils and charcoal appear to indicate differences in salinIty and drought, suggesting changes in climate. Scirpus, Salicornia, and high levels of charcoal seem to indicate drier/more saline conditions, while lack of these macrofossils and increases in Chara/Nitella, aquatic leaves, and very little charcoal suggests wetter conditions. Other macrofossils include Carex, Juncus, Polygonum, Zanichellia, Ruppia. High resolution AMS dating of plant macrofossils is in progress, and will be compared with changes in Hudson River sediment cores offshore. Foraminiferal assemblages from key intervals of the core will be presented. Human impact in the upper sediments is visible from the influx of grass seeds, primarily Phragmites, and the ragweed pollen rise.
Document ID
20010088102
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Kurdyla
(NASA Goddard Inst. for Space Studies New York, NY United States)
Peteet, Dorothy
(NASA Goddard Inst. for Space Studies New York, NY United States)
Liberman, Louisa
(NASA Goddard Inst. for Space Studies New York, NY United States)
Sugar
(NASA Goddard Inst. for Space Studies New York, NY United States)
Wong
(NASA Goddard Inst. for Space Studies New York, NY United States)
Hansen, James E.
Date Acquired
August 20, 2013
Publication Date
January 22, 2001
Subject Category
Earth Resources And Remote Sensing
Meeting Information
Meeting: American Geophysical Union Meeting
Location: Boston, MA
Country: United States
Start Date: May 29, 2001
End Date: May 31, 2001
Sponsors: American Geophysical Union
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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