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Source and environmental significance of oxalate in Laohugou Glacier No. 12, Qilian Mountains, Western China
Received:June 16, 2017  Revised:October 09, 2017  Click here to download the full text
Citation of this paper:WeiZhen Sun,XiaoQing Cui,GuangMing Yu,2018.Source and environmental significance of oxalate in Laohugou Glacier No. 12, Qilian Mountains, Western China.Sciences in Cold and Arid Regions,10(2):126~133.
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Author NameAffiliationE-mail
WeiZhen Sun State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China  
XiaoQing Cui State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China xiaoqing@lzb.ac.cn 
GuangMing Yu School of Resources and Environment Sciences, Anqing Normal University, Anqing, Anhui 246011, China  
基金项目:This study was supported by Equipment Function Development Technology Innovation Project of Chinese Academy of Science(Y429C51005), the National Natural Science Foundation of China (41301064), Gansu Provincial Natural Science Foundation of China (1506RJZA
 
Abstract:Retrieval of oxalate from snow and ice provides information on past environmental changes. In recent years, records of organic acids in middle- and low-latitude glaciers have attracted the attention of researchers globally. In this study, we analyzed oxalates in an ice core from Laohugou Glacier No. 12 on the Qilian Mountains at an elevation of 5,040 m a.s.l. in 2006. Average oxalate concentration was 18.5±2.4 ng/g over the prior 46 years. Oxalate values showed a significantly increasing trend since 1985. From 1985 to 1995, oxalate concentrations had large fluctuations, peaking in about 1987 and exhibiting a slightly decreasing trend since 1995. The result shows that the abrupt increase of oxalate concentration in the ice core since the mid-1980s reflects atmospheric environmental pollution by human and industrial activities.
keywords:glacier|ice core|environment|Qilian Mountains
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