南京市近20年酸雨发生趋势分析  

Trend Analysis of Acid Rain Events during Latest 20 Years of Nanjing

作　　者：王伟丽[1] 周鹏 

机构地区：[1]江苏省气象局,江苏南京210008 [2]南京市气象局,江苏南京210009

出　　处：《环境科学与技术》2013年第S1期113-116,共4页Environmental Science & Technology

基　　金：江苏气象局科研开放基金(km201105)

摘　　要：根据南京1992-2011年的酸雨观测资料,研究了南京市近20年的酸雨变化分布特征。结果表明:2001年以前,南京市酸雨发生频率逐年降低,2001年后呈逐年上升趋势,2005年以后年降水pH值均小于5.6,酸雨污染趋势上升;根据2002-2011年南京市6站环境监测数据分析,年平均PM10浓度逐年下降,SO2、NO2浓度先升后降多优于国家二级标准。综合酸雨和环境监测数据得出,南京市近年酸雨污染趋于严重的主要原因是可吸入颗粒物减少和外来污染源的输送影响。Based on the acid rain data observed from 1992 to 2011,the acid rain variation characteristics during latest 20 years of Nanjing were investigated in this study.Results showed that before the year of 2001,the frequency of acid rain events is decreased year by year,while after that,there is an increase trend.After 2005,the acid rain pollution rise significantly,the pH value of precipitation were less than 5.6 all the time.According to the analysis of the atmospheric environment data measured at six stations in Nanjing from 2002 to 2011,the annual mean concentrations of PM10 decreased year by year,and the SO2 and NO2 concentration earlier raised and later decreased,with most lower than the national secondary standard.Integrating the acid rain and environmental monitoring data,it can be found that the increased acid rain pollution in recent years may be mainly attributed to the decrease of inhalable particles concentrations and the effects of regional transport.

关 键 词：PH值 酸雨 南京市 PM10 

分 类 号：X517[环境科学与工程—环境工程]