CAJ | 학술논문

利用珠三角大气超级站2012年10月与2013年1月能见度、不同粒径颗粒物与BC质量浓度、气溶胶光散射系数、O3、相对湿度等在线监测数据，分析秋冬季节2次持续时间超过10 d的长时间灰霾过程污染特性与成因。结果表明，冬季灰霾过程中气溶胶吸光系数和光散射系数对大气总消光系数的贡献分别为13％和67％；PM2?5、PM1占PM10质量浓度分别为66％和39％；较高的PM2?5与BC日均浓度相关系数（R2＝0?88）体现了一次排放对颗粒物质量浓度及能见度的显著影响。秋季灰霾过程中气溶胶吸光系数和光散射系数对大气总消光系数的贡献分别为11％和69％，由BC导致的吸光效应较冬季下降了约20％；PM2?5和PM1占PM10质量浓度比例分别为68％和45％，均高于冬季；O3浓度日最大小时值的平均值接近冬季的2倍；二次来源对PM2?5浓度升高和能见度下降起主导作用。来自不同方向的2种气团在珠三角僵持，大气扩散条件差是导致这2次灰霾过程的重要外在条件，应成为灰霾预报预警的重点关注对象。
이용주삼각대기초급참2012년10월여2013년1월능견도、불동립경과립물여BC질량농도、기용효광산사계수、O3、상대습도등재선감측수거，분석추동계절2차지속시간초과10 d적장시간회매과정오염특성여성인。결과표명，동계회매과정중기용효흡광계수화광산사계수대대기총소광계수적공헌분별위13％화67％；PM2?5、PM1점PM10질량농도분별위66％화39％；교고적PM2?5여BC일균농도상관계수（R2＝0?88）체현료일차배방대과립물질량농도급능견도적현저영향。추계회매과정중기용효흡광계수화광산사계수대대기총소광계수적공헌분별위11％화69％，유BC도치적흡광효응교동계하강료약20％；PM2?5화PM1점PM10질량농도비례분별위68％화45％，균고우동계；O3농도일최대소시치적평균치접근동계적2배；이차래원대PM2?5농도승고화능견도하강기주도작용。래자불동방향적2충기단재주삼각강지，대기확산조건차시도치저2차회매과정적중요외재조건，응성위회매예보예경적중점관주대상。
Based on the on-line measurement of visibility, mass concentrations of size resolved particles and black carbon, particle light-scattering coefficient, ozone concentration and relative humidity etc. during October of 2012 and January of 2013 at the atmospheric supersite in the Pearl River Delta Region, the properties and causes of two so called long-time haze episodes lasting for over ten days were analyzed. It showed that during the winter episode, particle light-absorption coefficient and light scattering coefficient accounted for 13% and 67% in the total atmospheric extinction coefficient, respectively; PM2?5 and PM1 contributed 66% and 36% to PM10 mass;the higher correlation coefficient between daily PM2?5 and BC (R2 =0?88) indicated the significant influence of primary emission on the fine particles and visibility. During the autumn episode, particle light-absorption coefficient and light scattering coefficient accounted for 11% and 69% in the total atmospheric extinction coefficient, with 20% lower light-absorption effect of BC than winter episode; the contributions of PM2?5 and PM1 to PM10 were 68% and 45%, both larger than winter episode; the average value of the daily maximum O3 - 1 h was nearly twice of that in winter episode; secondary transformation played a major role in the particle mass concentration increase and visibility degradation. The conditions with two kinds of air masses in different directions stalemating over PRD region and weak diffusion were important external conditions for the two long-time haze episodes, and should be taken as one of the focuses for haze forecasting and warning.