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地理科学  2010 

丽江市大气环境特征分析

, PP. 588-593

Keywords: 丽江,大气环境,降水,化学

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Abstract:

丽江市1990~2003年SO2、NOx和TSP的平均浓度为0.018、0.013和0.112mg/m3,SO2和NOx浓度在1998之前为上升阶段,1998年之后为下降阶段。1989~2006年期间降水中年均pH值为6.08,高于酸雨标准值,EC均值为14.2US/cm;pH值自1994年以来一直处于缓慢上升状态,EC也呈现出缓慢上升趋势。1989~2006年降水中SO42-、NO3-、Cl-、NH4+、Ca2+、Mg2+、Na+、K+、平均浓度值依次为1.57、0.41、0.20、1.14、0.09、0.06、0.13mg/L。研究证实大气环境状况、气候特征和产业结构转型对丽江降水中离子浓度有重要影响。

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