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冰川冻土 ›› 1983, Vol. 5 ›› Issue (3): 101-112.

• 研究论文 • 上一篇    下一篇

天山东部冰川的氧同位素特征

渡边兴亚1, 上宏一2, 武筱舲1, 上田丰3   

  1. 1. 日本名古屋大学水圈科学研究所;
    2. 中国科学院兰州冰川冻土研究所;
    3. 日本山口大学教育学部
  • 出版日期:1984-11-25 发布日期:2012-04-26

Oxygen Isotope Characteristics of Glaciers in the Eastern Tian Shan

Okitsugu Watanabe1, Wu Xiaoling2, Koichi Ikegami1, Yutaka3   

  1. 1. Water Research Institute, Nagoya University Nagoya 464, Japan;
    2. Lanzhou Institute of Glaciology ami Cryopedology, Academia Sinica, Lanzhou China;
    3. Faculty of Feducation, Yamaguchi .University, Yamaguchi 753, Japan
  • Online:1984-11-25 Published:2012-04-26

摘要: 为研究冰川的补给及亚洲大陆腹部的水文特点,进行了在1981年7月中旬到8月中旬采集的降雨及冰川水样品的氧同位素成分测定。在考察期间,天山气象站(北纬43°06',东经86°50'.海拔3539米)及博格达峰地区大本营(3640米)每半日降雨同位素(δ18O)的平均值为-10‰~-11‰,变化幅度-1‰到-16‰。日降雨的δ18O平均值随日平均气温的降低而减小。冰川水与雪的δ18O值低于夏季降水的δ18O值。降水与冰川水δ18O值的差异是由于氧同位素的成分与气温有关。

Abstract: For the study of glacier nourishment and the hydrological characteristics in inland Asia, measurements of oxygen Isotope composition were carried out on samples of precipitation and glacial water collected during the period from the middle of July to the middle of August in 1981. δ18O values of each half day precipitation at Tian Shan Meteorological Station (13°06’N, 86°50’E; 3539m) and the base camp (3640m) in the Mt. Bogda region during the observed period had a weighted average of -10~-11‰ with a range between -1‰, and -16‰). The daily mean δ18O value of precipitation decreased with a decrease in daily mean air temperature. δ18O values of glacier ice and snow were less than those of summer precipitation. The difference of δ18O values between the precipitation and the glacial water is attributed to the dependence of the oxygen isotope composition on the air temperature.