Journal
QUATERNARY RESEARCH
Volume 63, Issue 3, Pages 238-249Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1016/j.yqres.2005.01.001
Keywords
pollen; charcoal; climate; Medieval Warming; Little Ice Age; land use; Hudson Valley; Phragmites; Typha
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Establishing natural climate variability becomes particularly important in large urban areas in anticipation of droughts. We present a welldated bi-decadal record of vegetation, climate, land use, and fire frequency from a tidal marsh in the Hudson River Estuary. The classic Medieval Warm Period is evident through striking increases in charcoal and Pinus dominance from similar to 800-1300 A.D., paralleling paleorecords southward along the Atlantic seaboard. Higher inputs of inorganic sediment during this interval suggest increased watershed erosion during drought conditions. The presence of the Little Ice Age ensues with increases in Picea and Tsuga, coupled with increasing organic percentages due to cooler, moister conditions. European impact is manifested by a decline in arboreal pollen due to land clearance, increased weedy plant cover (i.e., Ambrosia, Plantago, and Rumex), and an increase in inorganic particles to the watershed. (c) 2005 University of Washington. All rights reserved.
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