摘要
利用HYSPLIT4.8后推气流轨迹模式对辽宁省丹东市2007年的降水来源进行气流轨迹模拟,再通过聚类分析方法得到气流的平均轨迹分布,从而分析丹东市降水的来源及各方向气流对酸雨形成的影响。研究表明,丹东市酸雨污染主要受外来输送影响。在季风影响下,6—9月的雨季,来自西南和东南方向气流多经过河北、京津、山东等工业发达地区或朝鲜半岛,SO2和NO2污染较重,且运行高度低,地面污染贡献大,气流携带大量致酸前体物,在丹东形成酸性降水频率高,导致其酸雨污染严重。而来自西北方向的气流经过蒙古国、内蒙古自治区、辽宁省西部等工业欠发达地区,且多在高空运行,气流相对干净,很少形成酸性降水。
An air trajectory clustering methodology based on HYSPLIT4. 8 model and a clustering algorithm was developed to analyze the form of acid rain in Dandong city. The result showed the pollution of acid rain in Dandong was influenced by ecdemic transport. The air masses originated from east-south and southwest resulted in the pollution of acid rain, which passed Hebei, Beijing, Tianjin, Shandong area or korean peninsula. Relatively, the air masses originated from north-west hardly formed acid rain.
出处
《中国环境监测》
CAS
CSCD
北大核心
2013年第1期52-57,共6页
Environmental Monitoring in China
