Summary: 302
Physical Geography, 2002, 23, 4, pp. 302­320.
Copyright © 2002 by V. H. Winston & Son, Inc. All rights reserved.
A 545-YEAR DROUGHT RECONSTRUCTION FOR CENTRAL OREGON
Kelly A. Pohl and Keith S. Hadley
Department of Geography
Portland State University
P.O. Box 751
Portland, Oregon 97207
Karen B. Arabas
Department of Environmental and Earth Sciences
Willamette University
900 State Street
Salem, Oregon 97301
Abstract: Using a 545-year ponderosa pine (Pinus ponderosa) tree-ring chronology, we
examine the drought history of central Oregon to: (1) determine the relationship among
drought, ENSO (El Niño/Southern Oscillation), and the PDO (Pacific Decadal Oscillation),
and (2) compare the climatic sensitivity of ponderosa pine and western juniper (Juniperus
occidentalis) to determine their suitability as interchangeable climate proxies. Our climatic
reconstruction explained 35% of the variance in historical Palmer's Drought Severity Index

Source: Arabas, Karen - Environmental and Earth Sciences Department, Willamette University

Collections: Environmental Sciences and Ecology; Geosciences