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中国沙漠 ›› 2017, Vol. 37 ›› Issue (3): 546-553.DOI: 10.7522/j.issn.1000-694X.2016.00034

• 天气与气候 • 上一篇    下一篇

武威市降水pH值和电导率对沙尘天气的指示意义

李宗杰, 宋玲玲, 田青   

  1. 甘肃农业大学 林学院, 甘肃 兰州 730070
  • 收稿日期:2016-02-02 修回日期:2016-03-16 出版日期:2017-05-20 发布日期:2017-05-20
  • 通讯作者: 田青(E-mail:tqing@gsau.edu.cn)
  • 作者简介:李宗杰(1989-),男,甘肃会宁人,硕士研究生,研究方向为水土保持与环境过程。E-mail:lzjie314@163.com
  • 基金资助:
    甘肃省杰出青-基金项目(1506RJDA282);中国科学院“西部之光”人才培养计划西部博士项目;中国博士后管委会博士后国际交流计划项目(20140043);中国博士后科学基金项目(2012M510219,2013T60899);甘肃农业大学青-导师基金项目(GAU-QNDS-201602)

The pH and Electric Conductivity of Precipitation and their Indicative Significance of Sand-dust Weather in Wuwei, China

Li Zongjie, Song Lingling, Tianqing   

  1. College of Forestry, Gansu Agricultural University, Lanzhou 730070, China
  • Received:2016-02-02 Revised:2016-03-16 Online:2017-05-20 Published:2017-05-20

摘要: 对武威市2013年7月至2014年6月收集的降水样品pH值、电导率和主要阴阳离子浓度进行测定和分析。结果表明:(1)降水样品的pH值6.69~8.84,平均值7.52。降水样品电导率33.9~766 μS·cm-1,平均182.07 μS·cm-1。(2)电导率冬季 >春季 >夏季 >秋季,pH值春季 >夏季 >秋季 >冬季。pH值与电导率呈显著的负相关,与风速呈正相关;电导率与降水量呈显著的负相关,与风速呈显著的负相关。(3)pH值和电导率都会随着沙尘事件的发生表现出增加的趋势。当沙尘事件发生的情况下,Na+、K+、Mg2+、Ca2+、SO42-、Cl-和NO3+的离子浓度都呈现增加的趋势,但从各离子浓度变化幅度对沙尘事件的响应来看,Na+、K+和NO3-对沙尘天气比较敏感,反应强烈。

关键词: 沙尘天气, 降水, pH值, 电导率, 武威

Abstract: This research analyzed the pH, electric conductivity and the concentrations of main anion and cation of precipitation samples collected from July 2013 to June 2014 in Wuwei. The results showed that: (1)The pH of the precipitation samples ranged from 6.69 to 8.84, and the average was 7.52. The range of electric conductivity was 33.9-766 μS·cm-1, and the average was 182.07 μS·cm-1. (2)The order of electric conductivity was winter >spring >summer >autumn, and the order of pH was spring>summer>autumn>winter. The pH and electric conductivity showed a significant negative correlation. The pH showed a significant positive correlation with the wind speed. The electric conductivity showed significant negative correlation with the precipitation and wind speed. (3) The pH and EC showed an increasing trend with the occurrence of sand-dust events. When the sand-dust events occurred, the concentrations of Na+, K+, Mg2+, Ca2+, SO42-, Cl- and NO3- showed increasing trend, But Na+, K+ and NO3 is relatively more sensitive to sand-dust events.

Key words: sand-dust weather, precipitation, pH, electric conductivity, Wuwei

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