摘要
利用青岛市环境监测中心站环境监测资料、青岛市气象常规观测资料、美国国家环境预报中心(NCEP)再分析资料,对青岛地区2016年12月18—21日的一次雾霾重污染天气过程进行分析。结果表明:污染期间,亚欧大陆中高纬度地区500hPa呈两槽一脊的环流形式,青岛处于弱槽系统控制下,空气质量好转时,高空锋区明显增强,西北风加大,地面冷锋快速东移;此次雾霾重污染天气过程空气中近地面相对湿度一直维持较高,重污染期间小于2.6m·s^(-1)的地面风速对污染物扩散没有明显作用;污染物的浓度增加、持续阶段与气象要素能见度、风速、混合层厚度呈负相关性,与相对湿度呈正相关性,与温度的相关性较低;污染过程中青岛市区24h的输入污染源主要来自半岛北部地区,主要污染物为PM_(2.5)颗粒。
The weather condition,atmospheric circulation background,formation mechanism and pollutant trajectory of a heavy air pollution event occurring from 18 to 21 December of 2016 in Qingdao are analyzed based on the data of air quality observation,the routine weather observation and NCEP reanalysis data.The results are as follows:During heavy air pollution process,the 500 hPa circulation was the meridional pattern including two troughs and a ridge at high latitudes,with Qingdao under the control of a weak trough system.When air quality improved,the front and winds at 500 hPa enhanced,and the ground cold front moved to the east.The relative humidity near the ground maintained high constantly during the heavy pollution of haze,and the surface wind speed of less than 2.6 m·s-1 had no obvious effect on the pollutant diffusion during the heavy pollution.The increasing concentration of pollutants and pollution duration were negatively correlated with such meteorological factor as visibility,wind speed,mixing layer and thickness,and positively correlated with the relative humidity;and the correlation with temperature was low.The 24-h inputted pollutant sources in Qingdao were mainly from the northern part of the peninsula,with the main pollutants being PM2.5.
作者
王建林
时晓曚
赵文雪
夏子瑶
Wang Jianlin;Shi Xiaomeng;Zhao Wenxue;Xia Ziyao(Qingdao Meteorological Service,Qingdao Engineering Technology Research Center for Meteorological Disaster Prevention,Qingdao 266003)
出处
《气象科技》
2018年第6期1251-1257,共7页
Meteorological Science and Technology
基金
青岛市气象局气象科学技术研究项目(2015qdqxz01)
山东省科研课题(2017sdqxm11)资助
关键词
重污染
AQI
气象条件
后向轨迹
serious pollution weather
AQI
meteorological condition
backward trajectory
