HR: 09:00h
AN: PP11C-05    [Abstracts]
TI: The End of The Last Interglacial in Central Europe: Evidence From Varve Counted Maar Lake Sediments in The Eifel/Germany
AU: * Sirocko, F
EM: sirocko@uni-mainz.de
AF: Institut fuer Geowissenschaften, Johannes Gutenberg-Universitaet Mainz, Johann-Joachim-Becher-Weg 21, Mainz, 55099 Germany
AU: Seelos, K
EM: seelos@uni-mainz.de
AF: Institut fuer Geowissenschaften, Johannes Gutenberg-Universitaet Mainz, Johann-Joachim-Becher-Weg 21, Mainz, 55099 Germany
AU: Schaber, K
EM: schak021@students.uni-mainz.de
AF: Institut fuer Geowissenschaften, Johannes Gutenberg-Universitaet Mainz, Johann-Joachim-Becher-Weg 21, Mainz, 55099 Germany
AU: Dreher, F
EM: fdreher@uni-mainz.de
AF: Institut fuer Geowissenschaften, Johannes Gutenberg-Universitaet Mainz, Johann-Joachim-Becher-Weg 21, Mainz, 55099 Germany
AU: Rein, B
EM: brein@uni-mainz.de
AF: Institut fuer Geowissenschaften, Johannes Gutenberg-Universitaet Mainz, Johann-Joachim-Becher-Weg 21, Mainz, 55099 Germany
AB: We present in this paper evidence from 14C and OSL dated laminated Eifel maar lake records which cover the time from 20-140 ka. The greyscale variations in these cores show all MIS3- North Atlantic/Greenland interglacials, which allows tuning and direct comparison with the NorthGRIP ice core. The longest core reaches MIS6 and includes the last interglacial, which is represented by abundant interglacial tree pollen. Varve counting and parallel pollen analysis reveal a fully developed interglacial temperate forest from 126-112 ka. The onset of glaciation in North America and a 50 m global sea level drop started, however, already at 118 ka, which implies that the later part of the central European interglacial is contemporaneous with the North American glaciation. Abrupt cooling and a sharp climate change to a shrub tundra with frequent loess storms occurred in the Eifel/Central Europe during the C24 event at 110 ka thus 8000 years after the first ice sheet growth started at a summer insolation near 450 Wm2 at 65N, thus 50 Wm2 lower than today. Thus, abrupt climate change in central Europe occurred not before the time of the first surge of the Laurentide glacier and is most probably caused by rapid cooling of the sea surface temperatures in the North Atlantic drift (Gulf stream). The very end of the last interglacial in central Europe thus occurred at boundary conditions very different than today and the abruptness of the end of the Eemian is no analogue for the climate evolution of the next centuries.
UR: http://www.uni-mainz.de/FB/Geo/Geologie/sedi/index.html
DE: 3344 Paleoclimatology
DE: 1600 GLOBAL CHANGE (New category)
DE: 1620 Climate dynamics (3309)
SC: Paleoceanography and Paleoclimatology [PP]
MN: 2004 AGU Fall Meeting