Variations of δ18O in precipitation from the Muztagata Glacier,East Pamirs |
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| Authors: | Li Zhen Yao Tandong Tian Lide Xu Baiqing Wu Guangjian |
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| Affiliation: | (1) Key Laboratory of Cryosphere and Environment, Jointly Established by Cold and Arid Regions Environmental and Engineering Research Institute and Institute of Tibetan Plateau Research, Chinese Academy of Sciences and Chinese Academy of Meteorological Sciences, China Meteorological Administration, Lanzhou, 730000, China;(2) Laboratory of Environment and Process on Tibetan Plateau, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100085, China |
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| Abstract: | ![]()
Expeditions to Muztagata (in the eastern Pamirs) during the summer seasons of 2002 and 2003 collected precipitation samples and measured their oxygen isotopes. The δ 18O in precipitation displays a wide range, varying from −17.40‰ to +1.33‰ in June-September 2002 and from −22.31‰ to +4.59‰ in May-August 2003. The δ 18O in precipitation correlates with the initial temperature of precipitation during the observing periods. The positive correlation between δ 18O and temperature suggests that δ 18O can be used as an indicator of temperature in this region. The δ 18O values in fresh-snow samples collected from two snow events at different elevations on the Muztagata Glacier show a strong “altitude effect”, with a ratio of nearly −0.40% per 100 m from 5500 m to 7450 m. |
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| Keywords: | Muztagata δ 18O temperature altitude effect |
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