摘要
目的研究三明市大气空气质量与气象条件的关系。方法 2002—2006年三明市大气污染物 PM10、NO_2、SO_2的日监测数据来源于三元区政府、三明二中、三明钢铁厂、洋溪(对照点)4个环境监测站;气象资料取自相应8:00的850hPa 高空天气图,分析三明市大气空气质量的时空分布特征、变化趋势及其与气象条件的关系。结果三明市空气污染比较严重,空气质量状况较差,PM10是首要污染物;10月至次年4月,3种污染物浓度较高,5至9月较低;郊区各种污染物浓度远低于市区。暖式切变天气系统控制下的空气质量最好,其次是低压;暖区辐合天气系统控制下的空气质量最差,其次是大陆高压。偏东类风向时空气质量较好,偏西类风向时空气质量较差。结论天气系统和低空风向对三明市空气质量有一定的影响。
Objective To know the relationship between air quality and meteorological conditions in Sanming City, Fujian, China. Methods Based on the fixed point monitoring data of everyday air quality from Sanming Environmental Monitoring Center and the corresponding upper air synoptic chart from 2002 to 2006, the spatial and temporal distribution characteristics, the variation tendency of the ambient air quality and their relations with the meteorological conditions were analyzed by using Excel 2003 software. Results The air pollution in Sanming was serious,the PM10 was concluded as the predominant pollutant. The concentration of SO2, NO2 and PM10, which affected the air quality of Sanming, was higher during October-April, and it was lower during May-September. The concentration of the pollutants was higher in the urban areas compared with the suburbs. Conclusion The air quality in Sanming is related to the variation of the synoptic system. The air quality under the warm shear line system is best and under low system is next-best; the air quality under the warm sector convergence system is worst and under continent high system is next-worst; the low-level wind direction has some effect on the variation of the air quality, the air quality in easterly wind is better than that in westerly wind.
出处
《环境与健康杂志》
CAS
CSCD
北大核心
2008年第10期880-884,共5页
Journal of Environment and Health
基金
福建省气象局2006年开放式气象科学研究基金资助项目
关键词
空气污染
空气污染指数
空气质量
时空分布
气象因素
Air pollution
Air pollution index
Air quality
Spatial and temporal distribution
Meteorological factors
