CAJ | 학술논문

利用2006年7月广州细颗粒物质量浓度、数谱分布与化学组成的观测数据与气团后向轨迹聚类分析结果，系统分析了不同气团来源对广州细颗粒物理化特性的影响。观测期间，广州气团来源可分成来自远海、近海、西面陆地和北面陆地4种类型。细颗粒物总数浓度水平在4种类型中基本相当。当气团来自远海时，二次转化影响较小，PM2．5质量浓度较低，颗粒物数浓度从大到小依次为老化爱根核模态＞新鲜爱根核模态度＞积聚模态；受到海洋气团的影响，Cl-在PM2．5中比例为4种类型中最大。气团来自近海时，颗粒物二次生成与老化现象突出，数谱峰值出现在积聚模态，而其他类型出现在爱根核模态；SO2-4、OC与NO3-之和在PM2．5中的比例大于50％，为4种类型中最高。气团来自西面陆地和北面陆地时，细颗粒物受陆地传输老化气团和本地来源影响均较明显。来自北面陆地时，250 nm以上颗粒物数浓度明显升高，是PM2．5平均浓度远高于其他类型的直接原因之一。
이용2006년7월엄주세과립물질량농도、수보분포여화학조성적관측수거여기단후향궤적취류분석결과，계통분석료불동기단래원대엄주세과립물이화특성적영향。관측기간，엄주기단래원가분성래자원해、근해、서면륙지화북면륙지4충류형。세과립물총수농도수평재4충류형중기본상당。당기단래자원해시，이차전화영향교소，PM2．5질량농도교저，과립물수농도종대도소의차위노화애근핵모태＞신선애근핵모태도＞적취모태；수도해양기단적영향，Cl-재PM2．5중비례위4충류형중최대。기단래자근해시，과립물이차생성여노화현상돌출，수보봉치출현재적취모태，이기타류형출현재애근핵모태；SO2-4、OC여NO3-지화재PM2．5중적비례대우50％，위4충류형중최고。기단래자서면륙지화북면륙지시，세과립물수륙지전수노화기단화본지래원영향균교명현。래자북면륙지시，250 nm이상과립물수농도명현승고，시PM2．5평균농도원고우기타류형적직접원인지일。
Based on the measurement of mass concentrations, number size distributions, and chemical compositions of fine particles in Guangzhou in July of 2006 and the cluster analysis of air mass backward trajectories, the impact of air mass history on the physical and chemical properties of fine particles were discussed systematically. During the measurement period, the air mass backward trajectories can be categorized into four main types: From the open sea, from the offing, from the western continent, and from the northern continent. Total particle number concentrations of the four types were comparable. With air mass from the open sea, the influence of secondary transformation was weak, mass concentrations of PM2. 5 were low, and the rank of size resolved particle number concentrations was:Aged Aitken mode>fresh Aitken mode >accommodation mode; under the impact of marine air mass, the contribution of Cl- to PM2. 5 was the highest of the four types. With air mass from the offing, the effect of secondary transformation and aging process on fine particles was obvious:The average particle number size distribution peaked at the accommodation mode, different from the other types at the Aitken mode; the total contribution of SO2-4 , OC, and NO3- to PM2. 5 was over 50%, highest among the four types. When the air mass came from the western or northern continent, the effects on the fine particles imposed by the aged air mass transported over the land and local sources were both noticeable. Concentrations of fine particles over 250m increased significantly with the air mass from north, which was one of the direct causes of the much higher PM2. 5 mass concentration of this type than the other three ones.