HR: 0800h
AN: PP21B-1565    [Abstracts]
TI: The Use of High Magnitude Peaks in Sedimentary Charcoal and Magnetic Susceptibility in California to Detect a Response to Abrupt Climate Change 8,200 Years Ago as Recorded in Greenland Ice Cores.
AU: * Wathen, S F
EM: sfwathen@ucdavis.edu
AF: University of California, Plant Sciences Dept, Mail Stop 1 One Shields Ave., Davis, CA 95616
AB: Evidence from Coburn Lake, in the northern Sierra Nevada, suggests that unusually high occurrences of charcoal and increases in magnetic susceptibility correspond to periods of abrupt climate change that occurred 8,200 cal yrs BP and at other times during the Holocene. An explanation is offered that abrupt climate change can result in the death of existing vegetation followed by massive slope erosion. These changes in climate, vegetation and disturbance regimes might then be detected in the sediment record as increases in sediment and charcoal at and following these severe climatic events.
DE: 0473 Paleoclimatology and paleoceanography (3344, 4900)
DE: 0724 Ice cores (4932)
DE: 1620 Climate dynamics (0429, 3309)
DE: 3305 Climate change and variability (1616, 1635, 3309, 4215, 4513)
DE: 3344 Paleoclimatology (0473, 4900)
SC: Paleoceanography and Paleoclimatology [PP]
MN: Fall Meeting 2005