祁连山老虎沟12号冰川积雪化学特征及环境意义

doi:10.7522/j.issn.1000-0240.2013.0039

冰川冻土 ›› 2013, Vol. 35 ›› Issue (2): 327-335.doi: 10.7522/j.issn.1000-0240.2013.0039

祁连山老虎沟12号冰川积雪化学特征及环境意义

董志文¹, 任贾文¹, 秦大河¹, 秦翔^1,2, 崔晓庆¹, 杜文涛^1,2

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, 甘肃兰州 730000;
2. 中国科学院祁连山冰川与生态环境综合观测研究站, 甘肃兰州 730000

收稿日期:2012-08-05 修回日期:2012-11-28 出版日期:2013-04-25 发布日期:2013-05-14
作者简介:董志文(1984-), 男, 甘肃甘谷人, 2011年在中国科学院寒区旱区环境与工程研究所获博士学位, 现为在站博士后, 主要从事冰川与全球变化的研究. E-mail: dongzhiwen@lzb.ac.cn
基金资助:
国家自然科学基金项目(41121001; 41171053); 中国地质调查局项目(1212011087114); 中国博士后科学基金项目(2012M512049); 中国沙漠气象科学研究基金项目(Sqj2012001); 冻冻圈科学国家重点实验室开放基金(SKLCS2012-04); 兰州大学西部环境教育部重点实验室开放基金资助

Chemistry Characteristics and Environmental Significance of Snow Deposited on the Laohugou Glacier No. 12, Qilian Mountains

DONG Zhi-wen¹, REN Jia-wen¹, QIN Da-he¹, QIN Xiang^1,2, CUI Xiao-qing¹, DU Wen-tao^1,2

1. State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou Gansu 730000, China;
2. Qilian Shan Station of Glaciology andEcologic Environment Chinese Academy of Sciences, Lanzhou Gansu 730070, China

Received:2012-08-05 Revised:2012-11-28 Online:2013-04-25 Published:2013-05-14

摘要/Abstract

摘要：

2012年6月在祁连山老虎沟12号冰川采集雪坑和表层雪样品, 结合相关分析法、海盐示踪法、气团轨迹法等方法, 对冰川积雪的主要化学离子特征、来源及环境意义进行分析研究.结果表明, 积雪中平均离子浓度Ca²⁺>SO₄^2->NH₄⁺>NO₃^->Cl^->Na⁺>Mg²⁺>K⁺. 雪坑中Ca²⁺是主要的阳离子, SO₄^2-是主要的阴离子; 各种离子在雪坑中的平均浓度要远大于表层雪, 而且雪坑中的化学离子浓度峰值与污化层有着很好的对应性.同时, 与青藏高原、中亚天山、阿尔泰山以及北半球其他区域高海拔雪冰化学特征进行比较, 发现祁连山老虎沟12号冰川区积雪化学特征受亚洲粉尘源区陆源矿物影响较大.然而, 雪坑中的离子(尤其是Na⁺和Cl^-)除了陆源矿物粉尘之外, 部分还来源于海洋源.结合NOAA Hysplit模型对冰川区积雪化学离子来源进行了后向轨迹反演验证.

关键词: 祁连山, 老虎沟12号冰川, 积雪化学, 离子来源

Abstract:

Snow chemistry on the glaciers of high mountains is good indicator for studying atmospheric environment change. During the summer of 2006, snow samples were taken from three snowpits at different altitude on the Laohugou Glacier No.12 in the West Qilian Mountains of China, and then snow chemistry characteristics of the samples were measured. Correlation analysis and sea-salt tracing methods were used in this study to reveal the sources of major ions and dust particles. It is found that major ions in the snow have obvious seasonal variation. The major ionic concentrations rank as Ca²⁺> SO₄^2->NH₄⁺>NO₃^->Cl^->Na⁺>Mg²⁺>K⁺. Ca²⁺ is the dominate cation, and SO₄^2- is the dominate anion. The ionic correlation coefficient analysis shows that all the ions, except NO₃^-, have very good correlation. The glacier regions are mainly affected by dust activities. Moreover, the major ions, especially Na⁺ and Cl^-, are significantly affected by ocean in west, owing to precipitation mainly coming from west. Besides, there are part ions originating from the dust sources in central Asian.

Key words: snow chemistry, Laohugou Glacier No. 12, Qilian Mountains, ions sources

中图分类号:

P343.6

董志文, 任贾文, 秦大河, 秦翔, 崔晓庆, 杜文涛. 祁连山老虎沟12号冰川积雪化学特征及环境意义[J]. 冰川冻土, 2013, 35(2): 327-335.

DONG Zhi-wen, REN Jia-wen, QIN Da-he, QIN Xiang, CUI Xiao-qing, DU Wen-tao. Chemistry Characteristics and Environmental Significance of Snow Deposited on the Laohugou Glacier No. 12, Qilian Mountains[J]. JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY, 2013, 35(2): 327-335.

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祁连山老虎沟12号冰川积雪化学特征及环境意义

Chemistry Characteristics and Environmental Significance of Snow Deposited on the Laohugou Glacier No. 12, Qilian Mountains

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