| 典型季风型温冰川消融期融水化学日变化特征 |
| 摘要点击 1190 全文点击 847 投稿时间：2012-02-19 修订日期：2012-07-18 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 季风型温冰川 白水1号冰川 冰雪融水 δ18O 无机离子 |
| 英文关键词 monsoon temperate glacier Baishui Glacier No. 1 melt water δ18O inorganic ions |
|
| 中文摘要 |
| 分析了玉龙雪山白水1号冰川区2009年8月29日~9月3日4750 m处冰雪融水的pH、电导率、无机离子和δ18O的化学特征,结果表明,消融期日尺度上pH值受气温变化影响较大. 碱性尘埃中的可溶盐溶解导致融水电导率增大. 一天中消融速率快时δ18O值较低,消融速率慢时δ18O值较高. 受岩石岩性和海洋水汽影响,研究区Na+、K+的平均浓度高于Μg2+的平均浓度. 融水中阳离子主要来源于石灰岩风化,属典型的碳酸盐溶滤水. 融水中无机离子的总含量随气温的变化而变化,具有明显的周期性,但是不同可溶性离子对气温变化所导致的消融速率响应幅度不一致. 局地岩石岩性、季风输送和人类活动是白水1号冰川融水中无机离子的主要来源. |
| 英文摘要 |
| Melt water samples collected continuously from 29 August to 3 September 2009 in the Baishui Glacier No. 1 at elevation of 4750 m were analyzed for pH, conductivity, δ18O and inorganic ions. The results showed that the pH had obvious diurnal variations and was increased slightly by the influence of precipitation. The dissolution of alkaline soluble salts in the dust was the main reason for the increase of melt water conductivity; the value of δ18O was relatively low in strong ablation period and high in slight ablation period. Different from other research areas, the concentrations of Na+, K+, which were influenced by lithological and marine water vapor, were higher than that of Μg2+ in the study area; HCO3- and Ca2+ accounted for more than 80% of total ions in snow and ice melt water, indicating that the ions mainly came from limestone and the melt water was a typical carbonate solution; The content of melt water had an obvious daily change with temperature change,but the response amplitudes were different; Monsoon transport, local rock lithology, human industrial and agricultural activities were the main sources of inorganic ions and the deciding factors of the ion composition in the Baishui Glacier No.1. |
|
|
|
