摘要
利用2013～2015年廊坊市气象站霾、气温、相对湿度、气压、风速、降水、日照等地面观测资料以及环保局PM2. 5资料,对各级霾的季、日气象要素特征进行了深入研究,结果表明:(1)廊坊市各级霾均有明显的季节性分布特征,轻微霾以夏季为最多,轻度、中度霾以秋季为最多,重度霾以冬季为最多;(2)重度霾的日平均气温接近相应季节的季平均值,轻微及中度霾则与季平均气温相差较大,轻度霾与季平均气温相差最大;(3)各级别霾的平均相对湿度值均高于相应季平均值,且以重度霾高出平均值为最多;(4)较低的气压利于重度霾的形成;(5)各级别霾日平均风速均小于同季平均风速,以重度霾偏小最多;(6)随着霾级别加重,日照时数明显减少;(7)各级别霾日中无降水日占比最多,表明降水可以抑制霾的形成。
In this paper,the characteristics of seasonal and daily meteorological elements of different levels of haze were studied by using the meteorological observatory data(including haze,air temperature,relative humidity,air pressure,wind speed,precipitation,sunshine)and the data from environment bureau reports(PM2 5 concentration)from 2013 to 2015 in Langfang city.The results showed that(1)In Langfang City,all levels of haze have obvious seasonal distribution characteristics.The slight haze occurred most in summer,while mild and moderate haze occurred most in autumn,and the heaviest haze occurred most in winter.(2)The daily average temperature of heaviest haze days is close to the corresponding seasonal temperature,the average temperature of slight and moderate haze days is largely different from the seasonal temperature,and the average temperature of mild haze days is mostly different from the seasonal temperature.(3)The average relative humidity of different levels of haze days is higher than the corresponding seasonal average,the heavy haze is much higher than the seasonal average.(4)Lower air pressure facilitates the formation of heavy haze.(5)The daily mean wind speed of all levels of haze days was lower than the mean wind speed of the same season,the daily mean wind speed of heaviest haze days was much lower.(6)As the haze level increases,the number of hours of sunshine is significantly reduced.(7)No precipitation days accounted for the largest proportion of all levels of haze,indicating that precipitation can inhibit the formation of haze.
作者
秦云苗
郭立平
张卫中
闫利霞
单琨
闻静
QIN Yim-miao;GUO Li-ping;ZHANG Wei-zhong;YAN Li-xia;SHAN Kim;WEN Jing(Hebei Province Meteorological Bureau, Langfang, Hebei 065000, China;Hebei Province Meteorological Bureau, Bazhou, Hebei 065700, China;Hebei Province Environmental Protection Bureau, Langfang, Hebei 065000, China)
出处
《四川环境》
2018年第6期70-75,共6页
Sichuan Environment
基金
河北省廊坊市气象局2016年廊坊灾害性天气预报技术手册(201601)
关键词
各级霾
气象要素
异同特征
All levels of haze
meteorological elements
the similarities and characteristics
