摘要
利用2023年6月14一19日沈阳市环境空气质量监测数据和气象数据,采用空间分布、时序曲线、相关性分析、后向轨迹等方法,分析此次环境空气臭氧污染的特征、气象因素相关性、天气形势和外源输入贡献。结果表明:此次污染过程为区域性污染,6月17日臭氧最大8h滑动平均值达到214μg/m^(3),轻度污染,臭氧小时浓度最高值达到226μg/m^(3);沈阳市受到高压后部低压前部、低压倒槽和高压等天气系统影响时,易发生臭氧污染;臭氧浓度受到风向、风速、温度和相对湿度等气象因素协同影响,与风速和相对湿度呈负相关,与温度呈正相关;起源于沈阳市西南周边的气团占沈阳地区总空气团的45.83%;来自沈阳本地和西南方向的权重潜在源贡献因子(WPSCF)>0.5,加权浓度权重轨迹值(WCWT)>90.0,是臭氧污染过程主要源贡献。
Using the environmental air quality monitoring data and meteorological data of Shenyang City from June 14th to 19th,2023,spatial distribution,time series curve,correlation analysis,backward trajectory and other methods were used to analyze the characteristics,meteorological factor correlation,weather situation and external input contribution of this environmental air ozone pollution.The results showed that this pollution process was regional pollution,with a maximum 8-hour moving average of 214μg/m^(3)of ozone on June 17th,and mild pollution,with the highest hourly concentration of ozone reaching 226μg/m^(3);When Shenyang city was affected by weather systems such as high-pressure rear,low-pressure front,low-pressure trough,and high-pressure,ozone pollution was prone to occur.Ozone concentration would be influenced by meteorological factors such as wind direction,wind speed,temperature,and relative humidity,and was negatively correlated with wind speed and relative humidity,and positively correlated with temperature.The air masses originating from the southwestern periphery of Shenyang account for 45.83%of the total air masses in the Shenyang area.The weighted potential source contribution factor(WPSCF)from Shenyang and the southwest direction was greater than 0.5,and the weighted concentration weighted trajectory value(WCWT)was greater than 90.0,which were the main source contributions of ozone pollution processes.
作者
武威
付丹丹
李大志
WU Wei;FU Dan-dan;LIDa-zhi(Shenyang Ecological Environment Protection Comprehensive Administrative Law Enforcement Team,Shenyang Liaoning 110021,China;不详)
出处
《环境科学导刊》
2025年第4期61-66,共6页
Environmental Science Survey
关键词
臭氧
天气系统
后向轨迹
源贡献
沈阳市
Shenyang City
ozone
weather system
backward trajectory
source contribution
