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冰川冻土 ›› 2016, Vol. 38 ›› Issue (2): 312-322.doi: 10.7522/j.issn.1000-0240.2016.0034

• 冰冻圈与全球变化 • 上一篇    下一篇

气象要素影响下雪冰离子淋溶过程研究——以乌鲁木齐河源1号冰川为例

尤晓妮1 2, 李忠勤1, 王莉霞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. 天水师范学院 资源与环境工程学院, 甘肃 天水 741000
  • 收稿日期:2016-01-07 修回日期:2016-03-27 出版日期:2016-04-25 发布日期:2016-07-13
  • 作者简介:尤晓妮(1980-),女,讲师,2006年在中国科学院寒区旱区环境与工程研究所获硕士学位,现为在读博士研究生,主要从事气候变化与冰川研究.E-mail:yxn_818@yeah.net
  • 基金资助:
    国家自然科学基金项目(41261017)资助

An investigation of the relationship between meteorological elements and the variation of ion concentration in snowpack:as an example of Ürümqi Glacier No. 1 in eastern Tianshan

YOU Xiaoni1 2, LI Zhongqin1, WANG Lixia2   

  1. 1. State Key Laboratory of Cryospheric Sciences/Tianshan Glaciological Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
    2. College of Resources and Environmental Engineering, Tianshui Normal University, Tianshui 741000, China
  • Received:2016-01-07 Revised:2016-03-27 Online:2016-04-25 Published:2016-07-13

摘要: 为了更好地理解化学离子在雪坑中的迁移和保存,进一步解释冰芯记录,基于乌鲁木齐河源1号冰川海拔4130 m处的雪冰化学资料,研究了气温和降水与离子淋溶过程的关系.结果表明:气温与离子浓度呈负相关关系,夏季的雪坑离子浓度波动剧烈,冬季的雪坑离子浓度相对稳定.离子浓度随正积温的升高呈指数衰减趋势,当正积温至0℃以上时,离子浓度急剧降低;当正积温升至60℃左右时,离子浓度呈缓慢降低.不同离子的淋溶过程对正积温的响应有所不同,随着正积温的增加,SO42-,NO3-,Na+,Cl-,NH4+和Ca2+的衰减趋势非常显著,而Mg2+和K+则呈现无规律性的变化.淋溶因子指出,融水渗浸作用导致雪坑中大部分离子被淋溶;不同离子的淋溶因子也有明显差异,Mg2+淋溶因子最小(0.43),SO42-淋溶因子最大(0.84),说明Mg2+最为稳定,而SO42-最易淋溶.降水对雪坑离子浓度的影响较为微弱,主要通过增加表层雪离子浓度而提升整个雪坑的离子浓度.

关键词: 乌鲁木齐河源1号冰川, 淋溶, 离子浓度, 正积温, 降水

Abstract: We examine the impact of air temperature and precipitation on the chemical ionic concentration from successive snowpacks on Ürümqi Glacier No.1 in eastern Tianshan, central Asia. Data suggest that the arrival of high temperatures has more impaction on ionic concentration in snowpack. Therefore, we establish the correlation between positive accumulated temperatures and ionic concentration. The results indicate that ion concentrations are exponential decline along with positive accumulated temperature in strong elution periods. During this process, ionic concentration reduced sharply at first, then, generally decreased as temperature rising proceeds until it dropped to the minimum. Elution Factor shows most of ions were leached out from snowpack after summer melting at Ürümqi Glacier No.1. The continuous precipitation could increase the ions concentrations in snowpack through enhancing them in surface snow. However, the relationship is weak.

Key words: Ürümqi Glacier No.1, elution process, ion concentration, positive accumulated temperature, precipitation

中图分类号: 

  • P343.6