HR: 1340h
AN: PP13B-1492    [Abstracts]
TI: Extending the seesaw back in time
AU: Stocker, T F
EM: stocker@climate.unibe.ch
AF: Climate and Environmental Physics, Physics Institute, University of Bern, Sidlerstrasse 5 CH-3012 Bern Switzerland, Bern, BE CH3012 Switzerland
AU: * Siddall, M
EM: siddall@climate.unibe.ch
AF: Climate and Environmental Physics, Physics Institute, University of Bern, Sidlerstrasse 5 CH-3012 Bern Switzerland, Bern, BE CH3012 Switzerland
AU: Spahni, R
EM: spahni@climate.unibe.ch
AF: Climate and Environmental Physics, Physics Institute, University of Bern, Sidlerstrasse 5 CH-3012 Bern Switzerland, Bern, BE CH3012 Switzerland
AU: Blunier, T
EM: blunier@climate.unibe.ch
AF: Climate and Environmental Physics, Physics Institute, University of Bern, Sidlerstrasse 5 CH-3012 Bern Switzerland, Bern, BE CH3012 Switzerland
AB: Multiple studies document the existence of millennial scale variability in the Earth System during the last glacial period. Increasing numbers of studies further document the occurrence of similar millennial variability during glacial periods previous to the last one. We use the simplest possible thermal-bipolar seesaw model to consider this variability for the last four glacial periods. We invert this model and use high-pass filtered Vostok stable isotope records to estimate high latitude northern hemisphere temperatures. The model result is compared against the Vostok methane record, which shows rapid variations in parallel to Greenland temperature records during the last glacial period.
DE: 4901 Abrupt/rapid climate change (1605)
DE: 4938 Interhemispheric phasing
DE: 4962 Thermohaline
SC: Paleoceanography and Paleoclimatology [PP]
MN: Fall Meeting 2005