HR: 1340h
AN: PP33C-1608    [Abstracts]
TI: Microstructural Characterization Of Polycrystalline Ice From The East Rongbuk Glacier (Mt. Everest)
AU: * Sieg, K E
EM: katherine.e.sieg@dartmouth.edu
AF: Dartmouth College, Thayer School of Engineering 8000 Cummings Hall, Hanover, NH 03755 United States
AU: Obbard, R W
EM: rachel.w.obbard@dartmouth.edu
AF: Dartmouth College, Thayer School of Engineering 8000 Cummings Hall, Hanover, NH 03755 United States
AU: Baker, I
EM: ian.baker@dartmouth.edu
AF: Dartmouth College, Thayer School of Engineering 8000 Cummings Hall, Hanover, NH 03755 United States
AU: Mayewski, P
EM: paul.mayewski@maine.edu
AF: University of Maine, Climate Change Institute, Orono, ME 04469 United States
AU: Kang, S
EM: shichang.kang@itpcas.ac.cn
AF: Joint Key Laboratory of Cryosphere and Environment, Chinese Academy of Sciences, Lanzhou, 730000 China
AU: Hou, S
EM: shugui@lzb.ac.cn
AF: Joint Key Laboratory of Cryosphere and Environment, Chinese Academy of Sciences, Lanzhou, 730000 China
AU: Kaspari, S
EM: susan.kaspari@maine.edu
AF: University of Maine, Climate Change Institute, Orono, ME 04469 United States
AB: The microstructural texture and fabric of meteoric glacial ice, collected from the northern slope of Mt. Everest (28°01'N, 86°58'E; elevation 6500 m a.s.l.), is analyzed using a variety of characterization techniques including optical image analysis, scanning electron microscopy, electron dispersive spectroscopy and electron backscatter diffraction. The product of a low latitude mountain environment, this Himalayan ice presents some interesting differences from meteoric glacier ice from polar cores. A comparison between the Mt. Everest ice and that from Antarctica (Vostok) and Greenland (GISP2) illustrates the impact of mean temperature, seasonal differences in aerosol transport, unidirectional flow and state of stress on glacial microstructure. This work forms a benchmark for the further study of temperate zone glacier microstructure, and will help scientists to better interpret ice core records and learn more about atmospheric circulation and anthropogenic climate change.
DE: 0720 Glaciers
DE: 0724 Ice cores (4932)
DE: 0776 Glaciology (1621, 1827, 1863)
DE: 9320 Asia
SC: Paleoceanography and Paleoclimatology [PP]
MN: Fall Meeting 2005