2003广西主要城市空气质量评价及空气污染物浓度与气象条件关系

从南宁、桂林、北海三城市空气质量自动监测站监测到二氧化硫(SO2),二氧化氮(NO2),可吸入颗粒物(PM10)的日均浓度数据计算的空气污染指数API得出:2003年三城市空气质量状况整体为 级"优"或 级"良",达到了国家环境保护总局对城市环境规定的标准,特别是桂林市的空气质量最好。对各种污染物月平均浓度值与地面气象要素关系进行相关分析,发现相关性非常好,其中与气压呈正相关,与气温、水汽压、相对湿度、降雨量、风速、0厘米地温等要素呈反相关。各种污染物日平均浓度值与地面风速相关也非常好。

Assessment on Air Quality in Main Cities of Guangxi in 2003 and the Relationship between Air Pollutants Concentration and Meteorological Conditions

Calculated API (air pollution indices) according to the daily average concentration data on SO_2, NO_2 and PM_(10) obtained from the automatic observation stations in Nanning, Guilin and Beihai concludes that the air quality in these three cities is generally classified as 'very good' in grade I or 'good' in grade II, meeting the requirements of the State Environmental Protection Bureau on air quality, and that in Guilin is the best. The correlation analysis of the relationship between monthly average concentration of various pollutants and the ground meteorological factors proves a close correlation, which is in positive relation with air pressure and negative with other factors such as air temperature, steam pressure, relative humidity, precipitation, wind velocity and ground temperature at 0cm elevation. Daily average concentration of various pollutants also has a close correlation with ground wind velocity.