地理科学 ›› 2012, Vol. 32 ›› Issue (5): 641-648.doi: 10.13249/j.cnki.sgs.2012.05.641

• • 上一篇    

中亚天山托木尔峰地区青冰滩72号冰川雪坑化学特征及其环境指示意义

张晓宇1(), 李忠勤1,2, 王飞腾1, 王圣杰2   

  1. 1.中国科学院寒区旱区环境与工程研究所冰冻圈科学国家重点实验室/天山冰川观测试验站, 甘肃 兰州730000
    2.西北师范大学地理与环境科学学院, 甘肃 兰州730070
  • 收稿日期:2011-06-02 修回日期:2011-08-11 出版日期:2012-05-20 发布日期:2012-05-20
  • 作者简介:

    作者简介:张晓宇(1981-),女,河北省唐山市人,博士,主要从事冰川化学环境研究。E-mail:zhangxiaoyu@lzb.ac.cn

  • 基金资助:
    中国科学院知识创新工程重要方向项目(KZCX2-EW-311)、冰冻圈科学国家重点实验室自主研究项目(SKLCS-ZZ-2010-04)、国家自然科学基金项目(41171057,41161012,40930526) 和冰冻圈科学国家重点实验室自主课题(SKLCS-ZZ-2010-04)资助

Chemistry and Environmental Significance of Snow in Snow Pit of Glacier No.72, Mt.Tumur, Tianshan Mountains, Central Asia

Xiao-yu ZHANG1(), Zhong-qin LI1,2, Fei-teng WANG1, Sheng-jie WANG2   

  1. 1. Tianshan Glaciological Station ,State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou,Gansu 730000, China
    2. College of Geography and Environment Sciences, Northwest Normal University, Lanzhou,Gansu 730070, China
  • Received:2011-06-02 Revised:2011-08-11 Online:2012-05-20 Published:2012-05-20

摘要:

基于2008年7月天山托木尔峰地区青冰滩72号冰川雪坑实测资料,探讨其冰川雪坑离子化学特征及环境指示意义。研究发现,Ca2+、Mg2+是青冰滩72号冰川雪坑中主要阳离子;雪坑中阳离子浓度顺序为:Ca2+>Mg2+>Na+>K+>NH4+,其中,Mg2+、K+和 Ca2+主要反映长距离沙尘源物质传输情况;Cl-和Na+则一半以上来源于海盐;青冰滩72号冰川NO3-浓度高于天山地区含量平均值。

关键词: 雪化学, 托木尔峰地区, 天山, 离子来源

Abstract:

Snow chemistry and their environmental significance were studied by sampling a snow pit on July 2008 on Glacier No.72 in the Mt.Tumur region. Calcium (Ca2+) and Magnesium (Mg2+) are the dominant cations. The concentration order of the cations is: Ca2+>Mg2+>Na+>K+>NH4+. Ca2+ and Mg2+ reflected the long-distance natural land sources transmission. The concentration and seasonal distribution of Mg2+、Ca2+ and K+ in snow pit of the Glacier No.72 are affected by the input of dust aerosols from Sary Ishikortau desert, Muyunkum desert and Taklimakan desert. The ratio of C(Cl-)/C(Na+) is 1.02 and the non-marine source percent of Na+ is nearly 50%, it means half of the Cl- and Na+ are from sea salts. NO3- on Glacier No.72 was characterised by significant high concentration when compared with the mean value of glaciers in Tianshan region. Most air masses backward trajectories ending in December 2007 and February 2008 have passed the Taklimakan desert, while some even traveled across the industrial zone of the former Soviet Union, indicating that dust from the vast arid regions of central Asia is the dominant source for NO3- in Glacier No.72, while anthropogenic emissions are also an important source of NO3- from surrounding cities.

Key words: snow chemistry, Mt.Tumur region, Tianshan Mountains, source of ions

中图分类号: 

  • P343.6