摘要
利用2017—2018年1—12月天门市基本站逐日常规地面、探空实测资料,天门市城区环境保护局环境监测站同时段SO2、NO2、O3、CO、PM10、PM2.5逐日质量浓度监测资料及2017—2018年1—12月空气质量指数(AQI)逐日指数资料,在对天门市城区空气污染分布特征分析的基础上,重点对空气污染易发月份的污染气象条件进行详细分析。结果表明,天门市城区AQI为优、良、轻度污染、中度污染、重度污染的出现概率分别为21.0%、61.0%、14.0%、2.0%、2.0%,无严重以上污染日出现,年平均AQI为79.3;影响天门市城区空气质量的首要污染物是PM2.5,其次是PM10,天门市城区环境状况具有明显的季节变化特征,表现为冬季空气质量最差,污染日数主要集中在冬季,春、秋季次之,夏季最好;空气污染春节效应较为突出,分析2017、2018年春节前后7 d空气质量至少是轻度污染;空气PM2.5浓度与月降水量和月平均气温的关系为典型负相关,冬季天门市城区典型污染日更易出现在降水偏少、气温偏高、平均相对湿度偏大、平均气压偏低、平均风速偏小的天气;影响天门市城区空气质量的因素很多,主要有当地污染源的分布和强度、外地污染物的输入和天气扩散条件等,多种因素共同导致了2017年1月22—30日的长达9 d的空气污染过程。
Based on the daily conventional ground and sounding data of Tianmen Basic Station from January to December of 2017 to2018,the Tianmen city environmental protection agency environmental monitoring station at the same time period of SO2,NO2,such O3,CO,PM10 and PM2.5 mass concentration monitoring data on a daily basis,and AQI daily index data from January to December of 2017 to 2018,for nearly 2 years in Tianmen city air pollution based on the analysis of distribution features,the key pollution to the air pollution was used in meteorological conditions for detailed analysis. The results showed that the occurrence probability of AQI in Tianmen urban area was 21.0%,61.0%,14.0%,2.0% and 2.0%,respectively,and the average annual AQI was 79.3. The primary pollutant that affects the air quality of Tianmen city is PM2.5,followed by PM10. The environmental status of Tianmen city was characterized by obvious seasonal changes,showing that the air quality was the worst in winter,the number of polluted days was mainly concentrated in winter,followed by spring and autumn,and the best in summer. The effect of air pollution during the Spring Festival was prominent. The air quality in the seven days before and after the Spring Festival in 2017 and 2018 was at least slightly polluted. The relationship between air PM2.5 concentration and monthly precipitation and monthly average temperature was a typical negative correlation. In winter,typical pollution days in tianmen urban area were more likely to occur in weather with less precipitation,higher temperature,higher average relative humidity,lower average air pressure and lower average wind speed. There were many factors that affect the air quality in Tianmen city,including the distribution and intensity of local pollution sources,the input of pollutants from other areas,and weather diffusion conditions. A variety of factors jointly led to the 9-day air pollution process from January 22 to 30,2017.
作者
帅文卫
刘望平
刘伟
黄忠
曾静
SHUAI Wen-wei;LIU Wang-ping;LIU Wei;HUANG Zhong;ZENG Jing(Tianmen Meteorological Bureau,Tianmen 431700,Hubei,China)
出处
《湖北农业科学》
2020年第S01期347-351,共5页
Hubei Agricultural Sciences
关键词
空气污染
特征
气象条件
关系分析
air pollution
characteristic
meteorological conditions
relationship analysis
