【摘要】 利用丽水2012年9月—2014年3月主要空气污染物浓度和气象数据,分析丽水空气污染物构成及其与气象因子的相关性。分析结果表明:丽水空气质量优良率约80%,高频首要污染物依次为PM2.5、O38、PM10、NO2;各污染物浓度分布的时间、季节特征明显:早晚高峰时段污染物浓度普遍偏高,冬季—初春是一年中污染较重季节,尤其春节期间PM和SO2浓度急剧上升。各主要污染物质浓度随气象因子的变化各有特点:CO在气温较高、晴朗微风、高层层结稳定的天气条件下浓度较高;NO2在气温适中、湿度较大且无明显降水时浓度较高;SO2则在气温适中、湿度较小、晴朗微风的天气条件下浓度较高;O3则在高温干燥天气时浓度较高;PM在干燥、气温较低、连续晴朗、微风、高层层结稳定时浓度较高。更多还原

【Abstract】 This paper analyzed the constitution of air pollutants in Lishui and its correlation with meteorological factors,using the main air pollutant concentration and meteorological data in Lishui during the period from September,2012 to March,2014. The analysis results showed that the good air quality rate of Lishui was about 80%,the primary pollutants were PM2. 5,O38,PM10 and NO2. The distribution of pollutant concentration varied significantly according to time and season: the pollutant concentration was generally higher during rush hours in the morning and evening. From winter to early spring,it was the season of a year with heavy pollution,especially during the Spring Festival,PM and SO2 concentration increased sharply. The main pollutant concentration changing with the meteorological factors had different characteristics: the concentration of CO was higher in the weather conditions of high temperature,clear breeze,the stable upper air stratification. The concentration of NO2 was higher at moderate temperatures,higher humidity and no obvious precipitation. While the concentration of SO2 was higher at moderate temperatures,small humidity and clear breeze weather conditions. And O3 concentration was higher in dry and high temperature weather. PM was higher in the dry,low temperature,continuous clear breeze and stable upper air stratification weather.更多还原