摘要
长沙市是中南地区酸雨污染最为严重的城市之一。以长沙市1992—2001年的大气降水监测数据为基础对长沙市的大气沉降化学和酸性降水变化特征进行了分析和研究.结果表明,长沙市近10年的降水pH年均值都在5.0以下,直到1998年降水pH值和酸雨频率才有所减缓.大气降水的阴阳离子基本平衡,[Ca2+]浓度对降水离子的平衡有较大的影响.长沙市的净酸度沉积量在1998年高达-172.46meq/m2,净酸度的沉积量年际变化较大。
Changsha city is one of the severest polluted cities by acid rain in Central-south China. The atmospheric deposition chemistry and the variation characteristics of acid rain were analyzed and studied based on the monitoring data from 1992 to 2001 in Changsha city. The results showed that the annual mean pH value was fewer than 5.0 in the last decade in Changsha, until 1998 the situation has been modified to some extent. The ionic balance between anion and cation in the bulk precipitation remains balanced on...
出处
《城市环境与城市生态》
CAS
CSSCI
CSCD
北大核心
2003年第S1期23-25,共3页
Urban Environment & Urban Ecology
基金
国家自然科学基金资助项目(70171055
50179011)
2000年度高等学校优秀青年教师科研奖励计划项目
关键词
酸雨
SO2
降水化学
长沙市
acid rain
SO_2
chemistry of rainfall
Changsha city
