摘要
利用青岛市大气综合观测站的研究性监测数据，分析了2011年采暖期PM2.5和能见度的相关性，结果表明：①能见度在≤3km时，对应的PM2.5浓度超出0．250mg／m^3，属于严重污染；②PM2.5浓度对能见度的影响存在一临界区域，当PM2.5浓度低于该临界区时能见度会随PM2.5浓度减少迅速改善，临界值大致位于PM2.5浓度为0．100mg／m^3处；③相对湿度小于85％时，能见度与PM2.5浓度呈显著负相关。其中，相对湿度在60％-70％时，能见度与PM2.5浓度之间的相关性最好，PM2.5对能见度的影响最直接。
In this article,we analyze the correlation between PM2.5 and atmospheric visibility in heating season of year 2011, according to the monitored date from Qingdao comprehensive air -observing station. The results show that ： ① The atmosphere is serious pollution when visibility less than 3 km and PM2.5 more than 0. 250 mg/m^3 ; ② The effect of PM2.5 on visibility has a critical region and the value is about O. 100 mg/m^3. If PM2.5 is below the critical ,the visibility will rise rapidly with PM2.5 falls; ③It appears a remarkable negative correlation between PM2.5 and visibility when the relative humidity is less than 85%. A best correlation shows when the humidity among 60% to 70% , during which PM2.5 influences the visibility most di-rectly.
出处
《干旱环境监测》
2014年第1期14-17,30,共5页
Arid Environmental Monitoring
