HR: 14:10h
AN: OS22C-03    [PDF]
TI: Millennial and Centennial Variability of the California Current System During the Holocene Recorded in Santa Barbara Basin
AU: * Cannariato, K G
EM: cannaria@usc.edu
AF: University of Southern California, Department of Earth Sciences, Los Angeles, CA 90089 United States
AU: Kennett, J P
EM: kennett@geol.ucsb.edu
AF: University of California, Department of Geological Sciences, Santa Barbara, CA 93106 United States
AU: Kennett, D J
EM: dkennett@oregon.uoregon.edu
AF: University of Oregon, Department of Anthropology, Eugene, OR 97403 United States
AU: Revenaugh, J S
EM: justinr@umn.edu
AF: University of Minnesota, Department of Geology and Geophysics, Minneapolis, MN 55455 United States
AU: Malmgren, B A
EM: bjorn.malmgren@marine-geology.gu.se
AF: Goteborg University, Department of Earth Sciences-Marine Geology, Goteborg, SE-405 30 Sweden
AB: Understanding natural climate variability on millennial and centennial time-scales is necessary for predicting future climate change. Here we present planktonic foraminiferal oxygen and carbon stable isotope records at decadal resolution from Santa Barbara Basin documenting California Current system variability through the Holocene. Threshold mean-climate changes in SSTs and upper-water column structure occurred as well as significant millennial- and centennial-scale variability. A transition from warmer SSTs and a more stratified water column to cooler SSTs and a less stratified water column occurred between 4 and 3 ka and is associated with a global climate transition exhibited in records from the tropics to the poles. Millennial and centennial oscillations in SST and water column structure are associated with inferred atmospheric variability in the tropics, North Atlantic and Antarctic. These results suggest that interdecadal-like teleconnections may have been active on centennial and millennial time-scales. Furthermore, centennial periodicities imbedded in the records suggest possible forcing through variations in solar output.
DE: 4267 Paleoceanography
SC: Ocean Sciences [OS]
MN: 2003 Fall Meeting