2018年11月上旬一次中韩PM_(2.5)相互影响传输过程分析

Analysis of the Transmission Process of PM_(2.5) Interaction Between China and South Korea in Early November 2018

2018年11月5—7日,韩国首尔出现了一次PM_(2.5)污染过程。利用拉格朗日轨迹分析(HYSPLIT)模型分析了首尔峰值浓度气团的来源,结合污染物监测和气象资料,定性分析了中国对韩国浓度高值可能的影响及其程度。利用嵌套网格空气质量预报模式(NAQPMS)及其耦合的在线污染来源追踪模块进行了污染来源解析和敏感性测试,分别计算了同一时期中韩两国相互间的PM_(2.5)传输贡献。结果显示:2018年11月5—7日,中国对韩国首尔污染过程的日均贡献不足10%;此次污染过程后期,首尔的污染气团对上海PM_(2.5)浓度峰值产生了影响。

A PM_(2.5)pollution process occurred in Seoul,South Korea,on November 5th-7th,2018.HYSPLIT(Hybrid Single Particle Lagrangian Integrated Trajectory)was used to qualitatively analyze the sources of air mass in Seoul.Combined with pollutant monitoring and meteorological data,the possible impact of China on the high concentration value of South Korea was analyzed qualitatively.NAQPMS(Nested Air Quality Prediction Modeling System)numerical model and its coupled online pollution source tracking module were used for pollution source apportionment and sensitivity testing,and the contribution of PM_(2.5)transmission between China and South Korea during the same period was calculated.The results showed that the average daily contribution of Chinese pollutants to the pollution process from November 5th to 7th,2018 in Seoul,South Korea was less than 10%.It was also found that the air mass from Seoul had an influence on Shanghai’s peak PM_(2.5)concentration in the later stages of the pollution process.