中国地理科学(英文版) ›› 2010, Vol. 20 ›› Issue (5): 389-397.doi: 10.1007/s11769-010-0412-6

• 论文 • 上一篇    下一篇

Chemical Characteristics and Environmental Significance of Fresh Snow Deposition on Urumqi Glacier No.1 of Tianshan Mountains, China

LI Zhongqin1,2, LI Huilin1,3, DONG Zhiwen1,3, ZHANG Mingjun1,2   

  1. 1. The State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute/Tianshan Glaciological Station, Chinese Academy of Sciences, Lanzhou 730000, China;
    2. College of Geography and Environment Science, Northwest Normal University, Lanzhou 730070, China;
    3. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2010-02-08 修回日期:2010-06-02 出版日期:2010-09-15 发布日期:2010-09-14
  • 通讯作者: DONG Zhiwen.E-mail:happyabear@163.com E-mail:happyabear@163.com
  • 基金资助:

    Under the auspices of Major State Basic Research Development Program of China(No.2010CB951003);Knowledge Innovation Programs of the Chinese Academy of Sciences(No.KZCXZ-YW-127);National Natural Science Foundation of China(No.40631001,40571033,40701034,40371028,J0630966,40701035)

Chemical Characteristics and Environmental Significance of Fresh Snow Deposition on Urumqi Glacier No.1 of Tianshan Mountains, China

LI Zhongqin1,2, LI Huilin1,3, DONG Zhiwen1,3, ZHANG Mingjun1,2   

  1. 1. The State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute/Tianshan Glaciological Station, Chinese Academy of Sciences, Lanzhou 730000, China;
    2. College of Geography and Environment Science, Northwest Normal University, Lanzhou 730070, China;
    3. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
  • Received:2010-02-08 Revised:2010-06-02 Online:2010-09-15 Published:2010-09-14
  • Supported by:

    Under the auspices of Major State Basic Research Development Program of China(No.2010CB951003);Knowledge Innovation Programs of the Chinese Academy of Sciences(No.KZCXZ-YW-127);National Natural Science Foundation of China(No.40631001,40571033,40701034,40371028,J0630966,40701035)

摘要:

Ice and snow chemistry of alpine glaciers is crucial for the research of regional atmospheric environment change. Fresh snow samples were weekly collected from Urumqi Glacier No.1 in the Tianshan Mountains, Xinjiang, China, and the chemical characteristics and seasonal variations of major ions, mineral dust, δ18O and trace metals were measured. Results show that the concentrations of major ions in the snow are Ca2+ > SO42-> NH4+ > NO3-> Cl-> Na+ > Mg2+ > K+, in which Ca2+ is the dominant cation, and SO42- is the dominant anion. All major ions have close positive correlations with each other except NO3-. δ18O shows positive correlation with air temperature change during the study period. Mineral dust particle and major ionic concentrations in fresh snow have obvious seasonal change, with high concentration in spring but low concentration in summer and autumn, which indicates that the chemical mass input from Asian dust activity to snow is very significant. Temporal changes of trace metals in fresh snow, e.g., Cd, Pb, Zn, Al, Fe, have shown that human-induced pollution of central Asian region also has large contribution to the snow chemistry on alpine glaciers of the Tianshan Mountains.

关键词: Urumqi Glacier No.1, fresh snow, snow chemistry, Tianshan Mountains

Abstract:

Ice and snow chemistry of alpine glaciers is crucial for the research of regional atmospheric environment change. Fresh snow samples were weekly collected from Urumqi Glacier No.1 in the Tianshan Mountains, Xinjiang, China, and the chemical characteristics and seasonal variations of major ions, mineral dust, δ18O and trace metals were measured. Results show that the concentrations of major ions in the snow are Ca2+ > SO42-> NH4+ > NO3-> Cl-> Na+ > Mg2+ > K+, in which Ca2+ is the dominant cation, and SO42- is the dominant anion. All major ions have close positive correlations with each other except NO3-. δ18O shows positive correlation with air temperature change during the study period. Mineral dust particle and major ionic concentrations in fresh snow have obvious seasonal change, with high concentration in spring but low concentration in summer and autumn, which indicates that the chemical mass input from Asian dust activity to snow is very significant. Temporal changes of trace metals in fresh snow, e.g., Cd, Pb, Zn, Al, Fe, have shown that human-induced pollution of central Asian region also has large contribution to the snow chemistry on alpine glaciers of the Tianshan Mountains.

Key words: Urumqi Glacier No.1, fresh snow, snow chemistry, Tianshan Mountains