CAJ | 학술논문

　　通过对分段采样降水离子变化特征及其相关性分析，同时叠加后向气流轨迹的方法，分析了大连市降水酸度的影响因素。结果表明：大连市酸性降水与非酸性降水在pH值、离子浓度的分段变化中表现出不同的特征，影响降水酸度的因素差异很大。非酸性降水气团来自西北方向，各时段pH值变化不明显，反映云水和雨水酸度相近。云下冲刷阶段后离子浓度较低，污染较轻，大部分离子呈高度相关性，具有同源性，说明降水酸度主要受本地源影响；酸性降水气团来自偏南方向，pH值呈升-降-升趋势，离子浓度较高，污染较重，经过云下冲刷阶段后，浓度再次升高，说明云水带来的污染更重，致酸离子与小粒径离子相关强，说明降水酸度主要受远距离传输影响。
　　통과대분단채양강수리자변화특정급기상관성분석，동시첩가후향기류궤적적방법，분석료대련시강수산도적영향인소。결과표명：대련시산성강수여비산성강수재pH치、리자농도적분단변화중표현출불동적특정，영향강수산도적인소차이흔대。비산성강수기단래자서북방향，각시단pH치변화불명현，반영운수화우수산도상근。운하충쇄계단후리자농도교저，오염교경，대부분리자정고도상관성，구유동원성，설명강수산도주요수본지원영향；산성강수기단래자편남방향，pH치정승-강-승추세，리자농도교고，오염교중，경과운하충쇄계단후，농도재차승고，설명운수대래적오염경중，치산리자여소립경리자상관강，설명강수산도주요수원거리전수영향。
The influence of the pH of the rain in Dalian was discussed based on multi -step sampling and air trajectory clustering . The results showed that there were different characteristics of the pH and ionic concentration between acid rain and non -acid rain . The pH had no varieties and the ions showed high correlations in separate time period of the non -acid rain clustering from the northwest .While the pH had large varieties and the small ions showed high correlations in separate time period of the acid rain clustering from the south .The acid rain was formed by the long distance pollution .