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| PP05: | Late Pleistocene Variability in Ventilation of Deep and Intermediate Water Masses |
| Sponsor: |
Paleoceanography and Paleoclimatology
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| CoSponsor: |
Global Environmental Change Ocean Sciences |
| Convener: |
Robert Anderson Lamont Doherty Earth Observatory Lamont Doherty Earth Observatory 231 Comer Building Palisades, NY, USA 845-365-8508 boba@ldeo.columbia.edu Figen Mekik Grand Valley State University Grand Valley State University 1 Campus Drive Padnos Hall-Room 146 Allendale, MI, USA 616-331-3020 mekikf@gvsu.edu |
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4912 4926 4924 4936 .
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| Description: | A growing body of evidence supports the view that the structure and composition of water masses in the glacial ocean were fundamentally different than exists today, and that the water mass structure changed dramatically during glacial terminations. Increased ventilation of deep water masses during deglaciations may have contributed to the rise in atmospheric CO2 concentrations. However, some important findings remain inconsistent with this view; for example, radiocarbon ages of deep water masses are not as old as expected, nor are expected maxima in CaCO3 preservation seen at many sites. This session aims to assemble a broad spectrum of paleo-proxy records together with model results that offer new insights into changes in water mass structure and ventilation of the deep sea. Contributors are encouraged to compare their results with other recent findings in working toward a common view of Late Pleistocene variability in ventilation of deep and intermediate water masses. |