HR: 0800h
AN: C51A-1022    [Abstracts]
TI: Application Of Pollen Analysis For Seasonal Dating Of Alpine Glacier Ice Cores With Seasonal Missing Layers
AU: * NAKAZAWA, F
EM: nakazawa@ihas.nagoya-u.ac.jp
AF: Nagoya University, Graduate School of Environmental Studies, c/o Hydrospheric Atmospheric Research Center, Nagoya University, Furo-cho, Chikusa-ku,, Nagoya, 464-8601 Japan
AU: FUJITA, K
EM: cozy@ihas.nagoya-u.ac.jp
AF: Nagoya University, Graduate School of Environmental Studies, c/o Hydrospheric Atmospheric Research Center, Nagoya University, Furo-cho, Chikusa-ku,, Nagoya, 464-8601 Japan
AU: TAKEUCHI, N
EM: takeuchi@pop.chikyu.ac.jp
AF: Research Institute for Humanity and Nature, Research Institute for Humanity and Nature, 335 Takashima-cho, Marutamachi-dori Kawaramachi nishi-iru, Kamigyo-ku,, Kyoto, 602-0878 Japan
AU: FUJIKI, T
EM: fujikky@geobio.eps.nagoya-u.ac.jp
AF: Nagoya University, Division of Earth and Environmental Sciences, Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku,, Nagoya, 464-8601 Japan
AU: UETAKE, J
EM: juetake@bio.titech.ac.jp
AF: Tokyo Institute of Technology, Basic Biology, Faculty of Bioscience and Biotechnology, Tokyo Institute of Technology, Ookayama, Meguro-ku,, Tokyo, 152-8551 Japan
AU: AIZEN, V
EM: aizen@uidaho.edu
AF: University of Idaho, Moscow, College of Mines and Earth Resources, P.O. Box 443025, University of Idaho, Moscow,, Idaho, 83844-3025 United States
AU: NAKAWO, M
EM: nakawo@chikyu.ac.jp
AF: Research Institute for Humanity and Nature, Research Institute for Humanity and Nature, 335 Takashima-cho, Marutamachi-dori Kawaramachi nishi-iru, Kamigyo-ku,, Kyoto, 602-0878 Japan
AB: Ice core studies from middle and low latitude glaciers have a problem that a reliable dating method has proved difficult due to wind erosion and vanishingly small amount of seasonal precipitation. They obscure the annual signal from the seasonal variations in chemical concentrations and oxygen isotope ratios that are typically used to date for ice cores. On the other hand, the ice cores from alpine glaciers contain many species of pollen grains that have different pollen seasons. Here we show that these pollen peaks allow us to decide four seasonal layers of a snow pit, and examine whether some seasonal missing layers due to wind erosion or little seasonal precipitation exist. In addition, they accordingly allow us to give an accurate measure of annual snow deposition even from the glacier where some seasonal layers are eroded by wind, or missing due to little seasonal precipitation.
DE: 1827 Glaciology (1863)
DE: 1863 Snow and ice (1827)
SC: Cryosphere [C]
MN: 2004 AGU Fall Meeting