Korea Centre for Atmospheric Environment Research, 304 Koonghyon, Cheongwon, Choongbuk, 363-891, South Korea.
Environ Monit Assess. 2012 Apr;184(4):1973-84. doi: 10.1007/s10661-011-2092-9. Epub 2011 May 14.
Episodes of large-scale transport of airborne dust and anthropogenic pollutant particles from different sources in the East Asian continent in 2008 were identified by National Oceanic and Atmospheric Administration satellite RGB (red, green, and blue)-composite images and the mass concentrations of ground level particulate matter. These particles were divided into dust, sea salt, smoke plume, and sulfate by an aerosol classification algorithm. To analyze the aerosol size distribution during large-scale transport of atmospheric aerosols, aerosol optical depth (AOD) and fine aerosol weighting (FW) of moderate imaging spectroradiometer aerosol products were used over the East Asian region. Six episodes of massive airborne dust particles, originating from sandstorms in northern China, Mongolia, and the Loess Plateau of China, were observed at Cheongwon. Classified dust aerosol types were distributed on a large-scale over the Yellow Sea region. The average PM10 and PM2.5 ratio to the total mass concentration TSP were 70% and 15%, respectively. However, the mass concentration of PM2.5 among TSP increased to as high as 23% in an episode where dust traveled in by way of an industrial area in eastern China. In the other five episodes of anthropogenic pollutant particles that flowed into the Korean Peninsula from eastern China, the anthropogenic pollutant particles were largely detected in the form of smoke over the Yellow Sea region. The average PM10 and PM2.5 ratios to TSP were 82% and 65%, respectively. The ratio of PM2.5 mass concentrations among TSP varied significantly depending on the origin and pathway of the airborne dust particles. The average AOD for the large-scale transport of anthropogenic pollutant particles in the East Asian region was measured to be 0.42 ± 0.17, which is higher in terms of the rate against atmospheric aerosols as compared with the AOD (0.36 ± 0.13) for airborne dust particles with sandstorms. In particular, the region ranging from eastern China, the Yellow Sea, and the Korean Peninsula to the Korea East Sea was characterized by high AOD distributions. In the episode of anthropogenic polluted aerosols, FW averaged 0.63 ± 0.16, a value higher than that in the episode of airborne dust particles (0.52 ± 0.13) with sandstorms, showing that fine anthropogenic pollutant particles contribute greatly to atmospheric aerosols in East Asia.
2008 年，美国国家海洋和大气管理局（NOAA）卫星 RGB（红、绿、蓝）合成图像和地面颗粒物质量浓度识别到东亚大陆不同来源的大规模气载尘和人为污染物粒子的传输事件。通过气溶胶分类算法，将这些粒子分为尘、海盐、烟羽和硫酸盐。为了分析大气气溶胶大规模传输期间的气溶胶粒径分布，使用中分辨率成像光谱仪气溶胶产品的气溶胶光学深度（AOD）和细颗粒权重（FW）对东亚地区进行分析。在清州市观测到六次大规模气载尘粒子事件，这些尘粒源自中国北方、蒙古和中国黄土高原的沙尘暴。分类尘气溶胶类型在黄海地区呈大规模分布。PM10 和 PM2.5 占总质量浓度 TSP 的比例分别为 70%和 15%。然而，在一次中国东部工业区沙尘传输事件中，PM2.5 在 TSP 中的质量浓度高达 23%。在从中国东部流入朝鲜半岛的另外五次人为污染物粒子事件中，在黄海地区主要以烟羽形式检测到人为污染物粒子。PM10 和 PM2.5 占 TSP 的比例分别为 82%和 65%。TSP 中 PM2.5 质量浓度的比例因气载尘粒子的来源和路径而异。东亚地区人为污染物粒子大规模传输的平均 AOD 为 0.42±0.17，与沙尘暴气载尘粒子的 AOD（0.36±0.13）相比，大气气溶胶的比例较高。特别是从中国东部、黄海、朝鲜半岛到东海的区域，AOD 分布较高。在人为污染气溶胶事件中，FW 的平均值为 0.63±0.16，高于沙尘暴气载尘粒子（0.52±0.13），表明细人为污染物粒子对东亚大气气溶胶有很大贡献。
