摘要
2018年3月9日~14日天津市津南区出现了一次持续性空气污染过程,利用津南区PM2.5质量浓度观测资料和地面气象要素观测数据,从天气形势和气象要素2方面对此次重污染过程进行分析。结果表明,此次持续性污染过程PM2.5质量浓度达271μg/m^3,以细颗粒污染物为主;高空主要为高压脊前偏西风或平直的西风气流,低层受西南风控制;地面位于高压后部或低压前部,西南风不断将污染物从河北中南部向津南区输送。分析认为,高相对湿度、低风速和较低的混合层高度是造成此次持续性污染天气过程的主要气象要素,其中PM2.5质量浓度与混合层高度具有负相关。
From March 9 to 14,2018,there was a continuous air pollution process in Jinnan District,Tianjin. PM2.5 mass concentration observation data and surface meteorological element observation data of Jinnan District were used to analyze the heavy pollution process from weather situation and meteorological elements. The results show that the mass concentration of PM2.5 in the continuous pollution process reaches 271μg/m^3,which is mainly composed of fine particles. The high altitude is mainly the westerly or flat westerly flow in front of the high pressure ridge,and the lower layer is controlled by the southwest wind. The ground is located at the rear of the high pressure or the front of the low pressure,and the southwest wind continuously transportes pollutants from the central and southern Hebei Province to Jinnan District of Tianjin. According to the analysis,the main meteorological elements of this continuous pollution weather process result from high relative humidity,low wind speed and low mixed layer height,among which PM2.5 mass concentration is negatively correlated with the mixed layer height.
作者
吴洋
张禄
孙树鹏
廖云琛
WU Yang;ZHANG Lu;SUN Shupeng;LIAO Yunchen(Tianjin Jinnan District Meteorological Bureau,Tianjin 300350,China)
出处
《天津科技》
2020年第8期91-95,共5页
Tianjin Science & Technology
基金
国家自然科学基金项目“京津冀地区持续性雾霾天气的稳定分量提取和预报方法研究”(41805061)。
关键词
空气污染
气象要素
天气形势
air pollution
meteorological elements
synoptic situation
