HR: 0800h
AN: B11A-1006    [Abstracts]
TI: Isotopic variation of evapotranspirating vapor from grassland in the middle of Tibetan Plateau
AU: * Kurita, N
EM: nkurita@jamstec.go.jp
AF: Japan Agency Marine Earth Science and Technology(JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061 Japan
AU: Yamada, H
EM: yamada@jamstec.go.jp
AF: Japan Agency Marine Earth Science and Technology(JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061 Japan
AU: Yoshimura, K
EM: kei@iis.u-tokyo.ac.jp
AF: Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo, 153-8505 Japan
AB: We present here daily variation of isotopic composition of evapotranspirating vapor from grassland at the middle of Tibetan Plateau during rainy season. The evapotranspirating water was directly collected from small soil chamber from 13 to 28 August 2004. The temporal isotopic variation in evapotranspirating vapor shows gradual increase with time due to evaporation from soil surface accompanied with fractionation while anticyclone was covered. In this period the isotopic variation of precipitation at the study site also shows same increasing trend, although there is no relationship during large-scale disturbance passed through the study area. This result indicates that most of the precipitating water seems to be supplied from recycling water between land-surface and atmosphere when wind flux into Tibetan Plateau is weak.
DE: 0454 Isotopic composition and chemistry (1041, 4870)
DE: 1818 Evapotranspiration
DE: 1843 Land/atmosphere interactions (1218, 1631, 3322)
DE: 1854 Precipitation (3354)
SC: Biogeosciences [B]
MN: Fall Meeting 2005