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首页> 外文期刊>Air quality, atmosphere & health >On air pollutant variations in the cases of long-range transport of dust particles observed in central Korea in the leeside of China in 2010
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On air pollutant variations in the cases of long-range transport of dust particles observed in central Korea in the leeside of China in 2010

机译：关于2010年在中国中部地区朝鲜中部观察到的尘埃粒子远距离迁移情况下的空气污染物变化

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摘要

The occurrence and transport of dust storms and anthropogenic air pollutants in East Asia have been monitored using the meteorological satellite data of the National Oceanic and Atmospheric Administration (NOAA) and ground-based measurements at Cheongwon, a background observation site in central Korea. The nine cases, measured over 14 days, of natural dust particles caused by dust storms originating from northern China and Mongolia were observed at Cheongwon in the spring, autumn, and winter of 2010. In addition, seven cases, measured over 18 days, of anthropogenic dust particles originating from eastern China were observed over the course of a year. In those cases of natural and anthropogenic dust particles observed at Cheongwon, the level of particle matter (PM) with a diameter of ≤10 μm (PM10) (100 μgm−3 day−1) or PM2.5 (50 μgm−3 day−1) exceeded the air quality standards of Korea for 5 and 6 days, respectively. At the same time, CO concentrations rose higher due to long-range transport, while CO levels in the cases of anthropogenic dust particles (954 ppb) rose higher compared with the cases of natural dust particles (812 ppb). While gusty north–northwesterly winds were blowing in the front side of high-pressure systems, an increase in CO concentrations along with the influx of dust storms was observed at Cheongwon in the three natural dust particle cases with continental background airflow (n-CBAs). However, the other six natural dust particle cases with continental polluted airflow (n-CPAs) were also observed where mass concentrations of TSP, PM10 and PM2.5, and CO increased simultaneously after the CO concentrations rose and fell before dust storms had flowed in, showing double peaks. The mass concentrations of total suspended particle (TSP), PM10, and PM2.5 were high, and the PM2.5/TSP mass concentration ratio was high in n-CPAs, compared with n-CBAs. However, the anthropogenic dust particle cases with continental polluted airflow (a-CPA) are affected by air pollutants transported from eastern China by warm southwesterly winds, since central Korea is located in the rear side of the high-pressure system and in the foreside of the low-pressure system. Also, the anthropogenic dust particle cases with regionally polluted airflow (a-RPA) were observed in central Korea due to a stagnant high-pressure system for several days in the Yellow Sea region. In a-CPA, the mass concentrations of TSP, PM10, and PM2.5; the PM2.5/TSP mass concentration ratio; and the CO concentrations were all higher than in a-RPA.
机译：利用国家海洋和大气管理局（NOAA）的气象卫星数据以及朝鲜中部背景观测站点清原的地面测量，对东亚沙尘暴和人为空气污染物的发生和运输进行了监测。在2010年春季，秋季和冬季，在清原市观察到9起案例，这些案例是在14天之内测量的，是由中国北方和蒙古发起的由沙尘暴引起的自然尘埃粒子。此外，在18天的时间内，有7例案例是在18天的时间内观测到的。一年中观察到了源自中国东部的人为尘埃颗粒。在清原观测到的天然和人为尘埃颗粒情况下，直径≤10μm（PM10）（100μgm-3天-1）或PM2.5（50μgm-3天）的颗粒物（PM）的水平-1）分别超过韩国的空气质量标准5天和6天。同时，由于远距离迁移，CO浓度上升，而人为尘埃颗粒（954 ppb）的情况下，CO含量比天然尘埃颗粒（812 ppb）的情况下更高。在高压系统的前部吹来阵阵西北偏北风的情况下，在三种具有大陆背景气流（n-CBAs）的自然尘埃颗粒案例中，在清原市观察到了CO浓度的增加以及沙尘暴的涌入。 。但是，还观察到其他六种具有大陆性污染气流（n-CPA）的天然尘埃颗粒案例，其中在尘埃暴雨席卷而来之前，TSP，PM10和PM2.5以及CO的质量浓度在CO浓度上升和下降之后同时增加。 ，显示双峰。与n-CBA相比，n-CPA中总悬浮颗粒（TSP），PM10和PM2.5的质量浓度高，并且PM2.5 / TSP质量浓度比高。但是，由于中部位于高压系统的后部和前部，因此受到大陆性空气污染的人为尘埃颗粒病例（a-CPA）受温暖的西南风从中国东部运来的空气污染物的影响。低压系统。此外，由于黄海地区高压系统停滞了几天，在韩国中部观察到了人为污染的粉尘颗粒病例，受到区域性污染的气流（a-RPA）。在CPA中，TSP，PM10和PM2.5的质量浓度； PM2.5 / TSP质量浓度比；并且CO浓度均高于a-RPA。

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