HR: 14:40h
AN: PP53B-04    [Abstracts]
TI: Millennial Climate Oscillations and Global sea Level Changes. Evidence of Rapid Flooding Events in the Western Mediterranean Continental Margin
AU: * Sierro, F J
EM: sierro@usal.es
AF: Department of Geology, Univ. of Salamanca, P/ Merced s/n, Salamanca, 37008, Spain
AU: Andersen, N
AF: Institut für Geowissenschaften. Christian-Albrechts-Universität zu Kiel, Ludewig Meyn-Str. 10, Kiel, 24118, Germany
AU: Bassetti, M A
AF: Laboratoire Environnements Sédimentaires, BP 70, Plouzane, 29280, France
AU: Berne, S
AF: Laboratoire Environnements Sédimentaires, BP 70, Plouzane, 29280, France
AU: Canals, M
AF: G.R.C. Marine Geosciences, Department of Stratigraphy, Paleontology and Marine Geosciences, Campus de Pedralbes, Barcelona, 08028, Spain
AU: Curtis, J H
AF: Department of Geological Sciences, University of Florida, 241 Williamson Hall, Gainesville, Flo 32611, United States
AU: Dennielou, B
AF: Laboratoire Environnements Sédimentaires, BP 70, Plouzane, 29280, France
AU: Flores, J A
AF: Department of Geology, Univ. of Salamanca, P/ Merced s/n, Salamanca, 37008, Spain
AU: Frigola, J
AF: G.R.C. Marine Geosciences, Department of Stratigraphy, Paleontology and Marine Geosciences, Campus de Pedralbes, Barcelona, 08028, Spain
AU: Gonzalez-Mora, B
AF: Department of Geology, Univ. of Salamanca, P/ Merced s/n, Salamanca, 37008, Spain
AU: Grimalt, J O
AF: Department of Environmental Chemistry, Institute of Chemical and Environmental Research (CSIC), Jordi Girona, 18, 08034, Barcelona, Spain., Barcelona, 08034, Spain
AU: Hodell, D A
AF: Department of Geological Sciences, University of Florida, 241 Williamson Hall, Gainesville, Flo 32611, United States
AU: Jouet, G
AF: Laboratoire Environnements Sédimentaires, BP 70, Plouzane, 29280, France
AU: Perez-Folgado, M
AF: Department of Geology, Univ. of Salamanca, P/ Merced s/n, Salamanca, 37008, Spain
AU: Schneider, R
AF: Institut für Geowissenschaften. Christian-Albrechts-Universität zu Kiel, Ludewig Meyn-Str. 10, Kiel, 24118, Germany
AB: A continuous sediment record recovered in Borehole PRGL1 drilled in the upper slope from the Western Mediterranean continental margin allowed for the first time to directly calibrate millennial global sea level records to Greenland ice core chronologies. This record shows a series of condensed layers formed at times of rapid flooding of the continental shelf, when coastline moved landward tens of kms in a few hundreds of years. As the coastline moved landward sedimentation rate in the upper slope abruptly decreased with a simultaneous change from fine-grained, deltaic sediments to coarse-grained biogenic deposits. During the last deglaciation a prominent condensed layer was formed, which was dated between 14.5 kyr and the present. Other condensed layers formed during the major deglaciations of the last 400 kyr. Between 70 and 20 kyr five meltwater events were recognized that were calibrated to Greenland chronologies through the comparison of oxygen isotope records from the Mediterranean and Greenland ice cores. Rapid changes in Mediterranean sea surface temperatures simultaneous with Dansgaard-Oeschger events in Greenland allowed us to establish accurate phase relationships between millennial global sea level changes, variations in CO2 and abrupt climate oscillations in both Hemispheres.
DE: 1222 Ocean monitoring with geodetic techniques (1225, 1641, 3010, 4532, 4556, 4560, 6959)
DE: 1605 Abrupt/rapid climate change (4901, 8408)
DE: 3344 Paleoclimatology (0473, 4900)
DE: 4932 Ice cores (0724)
SC: Paleoceanography and Paleoclimatology [PP]
MN: 2007 Fall Meeting