HR: 08:00h
AN: PP31C-01    [Abstracts]
TI: A Continuous IC Glaciochemical Record of the last Glacial Period from the NGRIP Ice Core
AU: * Siggaard-Andersen, M
EM: mlsa@gfy.ku.dk
AU: Hansson, M
PP31C-01 AU: Fischer, H
PP31C-01 AU: Bigler, M
PP31C-01 AU: Roethlisberger, R
PP31C-01 AU: Goto-Azuma, K
PP31C-01 AU: Steffensen, J
PP31C-01 AU: Ruth, U
PP31C-01 AU: Andersen, K K
PP31C-01 AU: Clausen, H B
PP31C-01 AU: Jonsell, U
PP31C-01 AB: Comprehensive chemical analysis of aerosol components over the time period from 100,000 to 10,000 years before present was performed on the NGRIP ice core. In line with high-resolution chemical flow analysis, a continuous sampling of ice core melt water was performed at 55 cm resolution for ion chromatographic (IC) analysis of soluble ions. These records provide a unique potential for detailed investigations of conditions for source load and transport of aerosol during the last glacial period. A comparison with GISP2 IC record shows a good agreement between the two ice core records, but with generally higher concentrations in the NGRIP ice core. A more detailed comparison between the two ice core ion records reveals strong regional differences in source contributions and transport paths for sea salt and dust aerosol over Greenland during the glacial period, indicating a different transport pattern for aerosol over Greenland during the last glacial period.
DE: 2419 Ion chemistry and composition (0335)
DE: 4904 Atmospheric transport and circulation
DE: 4906 Aerosols (0305, 4801)
DE: 4926 Glacial
DE: 4932 Ice cores (0724)
SC: Paleoceanography and Paleoclimatology [PP]
MN: Fall Meeting 2005