CAJ | 학술논문

为了解大气中各物理和化学过程对气溶胶浓度的贡献情况，利用 Models-3/CMAQ 模式系统对珠江三角洲(以下简称珠三角)秋季典型气溶胶污染进行研究.模拟时间是2012年10月，期间珠三角主要受高压系统的控制，在17日冷锋过境前后高压天气形势发生转变，风向从东北风转为偏东风.结果表明，珠三角秋季 PM2.5浓度呈现西高东低的水平分布特征，随着高度的上升浓度高值中心也向西南方向偏移；受大气边界层高度的影响，陆地上 PM2.5输送高度呈现白天高夜晚低的变化特征；过程分析结果表明源排放，水平输送和垂直输送是影响近地面PM2.5浓度变化的主要过程；本地污染物排放是城市中心(广州站)PM2.5浓度升高的主要原因，而在下风向位置(江门站)外来污染物的水平输送过程是PM2.5的最主要来源.
위료해대기중각물리화화학과정대기용효농도적공헌정황，이용 Models-3/CMAQ 모식계통대주강삼각주(이하간칭주삼각)추계전형기용효오염진행연구.모의시간시2012년10월，기간주삼각주요수고압계통적공제，재17일랭봉과경전후고압천기형세발생전변，풍향종동북풍전위편동풍.결과표명，주삼각추계 PM2.5농도정현서고동저적수평분포특정，수착고도적상승농도고치중심야향서남방향편이；수대기변계층고도적영향，륙지상 PM2.5수송고도정현백천고야만저적변화특정；과정분석결과표명원배방，수평수송화수직수송시영향근지면PM2.5농도변화적주요과정；본지오염물배방시성시중심(엄주참)PM2.5농도승고적주요원인，이재하풍향위치(강문참)외래오염물적수평수송과정시PM2.5적최주요래원.
For the purpose of discerning the contributions of various physical and chemical processes to the aerosol concentration in the atmosphere, Models-3/CMAQ modeling system has been used to study the typical aerosol pollution in autumn over Pearl River Delta (PRD), China. The simulated period was October 2012, when PRD was under the control of a high-pressure system. The wind direction switched from north-east to east when a cold font passed PRD on October 17th. It was found that PM2.5 concentration in the western part of PRD was higher than that in the eastern part, and the region of the highest concentration extended southwestward with increase in height. Influenced by planetary boundary layer height, PM2.5 was transported to higher altitudes in the daytime than in the nighttime on land. The results of process analysis showed that emission, horizontal transportation and vertical transportation were the most important processes in the variations of PM2.5 concentration near land surface. Local pollutants emission was the most important factor of rising concentration in city center (Guangzhou site), while horizontal transportation of non-local pollutants was the major source of PM2.5 in the downwind area (Jiangmen site).