2008—2014年渭南市大气降水化学特征研究  

Study on Chemical Characters of Atmospheric Precipitation in Weinan in the Years of 2008—2014

作　　者：朱蕾[1] 卢爱刚[2] 

机构地区：[1]渭南师范学院数理学院,陕西渭南714099 [2]渭南师范学院农商学院,陕西渭南714099

出　　处：《渭南师范学院学报》2017年第16期46-52,共7页Journal of Weinan Normal University

基　　金：国家自然科学基金项目:秦岭太白山地区降水化学及其环境意义(41171061);陕西省自然科学基础研究重点项目:秦岭太白山地区大气汞湿沉降时空分布特征研究(2015JZ008)

摘　　要：对2008—2014年渭南市各监测点降水数据进行统计分析,了解了渭南市大气降水特征及化学组成成分的变化规律。结果表明:降水pH值年际变化在5.47~6.83之间,呈波动性变化。电导率年变化起伏较大,2011年值最大。降水量季节变化比较明显,冬季降水量少,夏季和秋季降水量较多。pH月均值在每年11月至次年2月较低。SO_4^(2-)、NO_3^-、Ca^(2+)、NH_4^+占全部离子的89.41%,是降水化学组成的主要离子;SO_4^(2-)/NO_3^-在近几年均大于3,说明渭南市大气降水的离子组成中SO_4^(2-)是降水酸化的主要原因。The precipitation monitoring data were statistically analyzed in the years of 2008-2014 to understand the feature and chemical composition of atmospheric precipitation in Weinan. The results showed that annual change of pH was from 5.47 ？6.83 with change in volatility. Electrical conductivity varied significantly among years, with highest value in 2011. Precipitation amount varied seasonally： it was less in winter and it was great in summer and autumn. Monthly mean of pH values was low in November to the next year in February,and accounted for 89.41% in the total ions,and these ions were the main chemical composition of the pre-cipitation. was greater than 3 in recent years,and it showed that was the main reason caused precipitation acid in the atmosphere in Weinan.

关 键 词：大气降水 PH值 电导率 化学组成 渭南市 

分 类 号：P426.6[天文地球—大气科学及气象学]