HR: 1340h
AN: U13B-1151    [Abstracts]
TI: Regional Arctic and Hemispheric Teleconnections expressed in the paleoenvironmental record of El'gygytgyn Lake, NE Russia
AU: * Brigham-Grette, J
EM: juliebg@geo.umass.edu
AF: Dept of Geosciences, UMass, Morrill Science Bldg, Amherst, MA 01003, United States
AU: Melles, M
EM: mmelles@uni-koeln.de
AF: Inst of Geology & Mineralogy, University of Cologne, Cologne, D-50674, Germany
AU: DeConto, R
EM: deconto@geo.umass.edu
AF: Dept of Geosciences, UMass, Morrill Science Bldg, Amherst, MA 01003, United States
AU: Koenig, S
EM: koenig@geo.umass.edu
AF: Dept of Geosciences, UMass, Morrill Science Bldg, Amherst, MA 01003, United States
AB: The common goal of recovering long high-resolution records is in testing relevant questions of Earth system dynamics, as well as documenting the drivers of regional and global scale change. Lake El'gygytgyn, located 100 km north of the Arctic Circle in NE Russia is a target for deep drilling a continuous record back to ~3.6 My in Spring 2009. Pilot cores dating to 250ka to 300 ka provide the impetus for evaluating the sensitivity of the Arctic to regional and global climate events on millennial timescales. A clear record of the Younger Dryas, rapid change within MIS 3, and events including interstadials 19, 20, events within Stage 5, and at the end of stage 6 seen in Greenland and marine records suggest that oceanographic and atmospheric changes over the North Atlantic are reflected in hydrologic and seasonal temperature proxies. Rapid events are recorded despite demonstrated precessional influences and the suggested upwind influence of the Eurasian Ice sheet and dramatic changes in continentality due to changes in sea level across the Bering/Chukchi shelves and the extent and seasonal persistence of sea ice in the Arctic Ocean and deeper Bering Sea. Regionally, lake cores throughout Beringia reflect patterns of precipitation and temperature that point to persistent zonal differences in the response of the landscape to environmental change.
DE: 1225 Global change from geodesy (1222, 1622, 1630, 1641, 1645, 4556)
DE: 1605 Abrupt/rapid climate change (4901, 8408)
DE: 1616 Climate variability (1635, 3305, 3309, 4215, 4513)
DE: 1637 Regional climate change
SC: Union [U]
MN: 2007 Fall Meeting