2014年2月呼和浩特市一次持续性霾天气特征分析

发布时间：2018-07-11 16:50

本文选题：霾 + PM.　；参考：《干旱区资源与环境》2016年03期

【摘要】：利用常规气象资料、NCEP再分析资料和内蒙古环境监测中心站的污染物浓度监测资料,对2014年2月21~26日发生在呼和浩特市的持续性霾天气过程进行分析。结果表明:此次呼和浩特市霾天气过程的主要污染物为PM2.5,个别时段主要污染物为PM10。呼和浩特市PM2.5浓度变化有双峰型特点,最大值出现在午夜,最小值出现在早晨,午后一般会出现次大值。PM10浓度在00时左右达到最大值,在00时前后,PM10浓度会出现第二个峰值,与最大值相当。PM10浓度最小值出现在早晨,有的在傍晚。稳定的天气系统为霾的发生、维持提供了有利的背景条件。呼和浩特市持续性霾的气象条件是:地面风速小于4m/s、地面到850hpa出现逆温及较小的温度露点差持续较长时间。
[Abstract]:Using NCEP reanalysis data and pollutant concentration monitoring data from Inner Mongolia Environmental Monitoring Center, the persistent haze weather process occurred in Hohhot from February 21 to 26, 2014 was analyzed. The results showed that PM2.5 was the main pollutant in the haze weather process in Hohhot, and PM10 was the main pollutant in some periods. The variation of PM2.5 concentration in Hohhot city has a bimodal pattern, the maximum value appears at midnight, the minimum value appears in the morning, the concentration of PM10 reaches the maximum at about 00:00 in the afternoon, and the second peak occurs around 00:00. The minimum concentration of PM10 was found in the morning, and some in the evening. Stable weather system provides favorable background for haze occurrence and maintenance. The meteorological conditions of the persistent haze in Hohhot are as follows: the surface wind speed is less than 4 m / s, the temperature inversion from the ground to 850hpa and the smaller difference of temperature and dew point persist for a long time.
【作者单位】：内蒙古自治区气象台;
【基金】：中国气象局小型业务建设项目(京津冀、长三角及珠三角环境气象预报预警服务系统建设) 内蒙古沙尘暴、雾霾预报专家团队资助
【分类号】：X51

【共引文献】