南京冬夏硫酸盐和硝酸盐对黑碳混合态的影响  

Impact of sulfate and nitrate on black carbon aerosols at Nanjing in winter and summer

作　　者：杨一帆 汤莉莉[2,3] 许潇锋[1] 蒋磊[2] 刘丹彤[4] 张运江 花艳[2] 杜嵩山[3] 王壮[2] 周宏仓[2] YANG Yi-fan;TANG Li-li;XU Xiao-feng;JIANG Lei;LIU Dan-tong;ZHANG Yun-jiang;HUA Yan;DU Song-shan;WANG Zhuang;ZHOU Hong-cang(School of Atmospheric Physics,Nanjing University of Information Science&Technology,Nanjing 210044,China;Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CICAEET),School of Environmental Science and Engineering,Nanjing University of Information Science&Technology,Nanjing 210044,China;Jiangsu Environmental Monitoring Center,Nanjing 210036,China;Centre for Atmospheric Science,School of Earth,Atmospheric and Environmental Sciences,University of Manchester,Manchester M139PL,UK;Institut National de l’Environnement Industriel et des Risques,Verneuil-en-Halatte 60550,France;Laboratoire des Sciences du Climat et l'Environment,CNRS-CEA-UVSQ,Gif sur Yvette 91191,France)

机构地区：[1]南京信息工程大学大气物理学院,江苏南京210044 [2]南京信息工程大学环境科学与工程学院,江苏省大气环境与装备技术协同中心,江苏南京210044 [3]江苏省环境监测中心,江苏南京210036 [4]英国曼彻斯特大学地球与环境科学学院大气科学中心,英国曼彻斯特M139PL [5]法国国家工业环境与风险研究院,法国阿拉特地区60550 [6]法国国家科学中心气候与环境实验室,法国吉夫续尔伊凡特91191

出　　处：《中国环境科学》2018年第4期1221-1230,共10页China Environmental Science

基　　金：国家自然科学基金重大研究计划(D0512/91544231);国家重点研发计划(2016YFC0200505);国家重点研发计划(2016YFA0602003)

摘　　要：采用单颗粒黑碳光度计(SP2)结合MARGA在线分析仪对南京地区冬季和夏季黑碳(BC)的质量浓度,以及硫酸盐,硝酸盐对其混合状态的影响进行了研究.结果表明,冬季和夏季南京地区BC质量浓度分别在1.01~14.5μg/m3和0.20~3.81μg/m3之间,均值分别为(4.39±2.66)μg/m3和(1.67±0.76)μg/m3,均呈现早晚高值的双峰型日变化特征.运用相对包裹层厚度Dp/Dc表示BC混合状态,冬季和夏季Dp/Dc分别在1.39~2.34和1.03~1.45之间,均值分别(1.81±0.21)和(1.24±0.08),Dp/Dc日变化特征与BC相反,冬季Dp/Dc日变化幅度较大.冬季Dp/Dc与SO42-和NO3-的相关性较好,Dp/Dc与NO3-的相关性高于其与SO42-的相关性,夏季则相反.冬季清洁时期BC以本地源排放为主,其混合状态受硫酸盐和硝酸盐影响较高,冬季重污染时期,受排放源以及区域传输的影响,Dp/Dc与SO42-和NO3-的相关性较低.The impact of nitrate and sulfate aerosols on the mixing state of black carbon(BC)particles was investigated by using on-line measurements of a single particles soot photometer(SP2)and a MARGA in urban Nanjing in winter and summer.Results showed that the mass concentration of BC was in the range of 1.01~14.5μg/m3(0.20~3.81μg/m3),with an average value of(4.39±2.66)μg/m3[(1.67±0.76)μg/m3]in winter(summer),respectively.The diurnal variations of BC particles presented two peaks relative to rush hours in morning and evening.The mixing state of BC-containing particles were evaluated as a ratio of Dp/Dc,the average ratio of which was 1.81±0.21(1.24±0.08)and ranged from 1.39 to 2.34(from 1.03 to 1.45)in winter(summer),respectively.Dp/Dc showed an opposite diurnal trend as comparing with BC,where made more obvious variations for winter.Dp/Dc correlated well with sulfate and nitrate,and showed higher correlation with nitrate(sulfate)in winter(summer),respectively.Local emissions were the major source contributing to BC,the mixing state of which was more significant influence of nitrate and sulfate during clean periods in winter.The correlation between Dp/Dc with sulfate and nitrate in winter was lower during heavy pollution periods,resulting from the effects of both local emissions and regional transports on ambient BC particles.

关 键 词：南京 黑碳 单颗粒黑碳光度计(SP2) 混合态 硫酸盐 硝酸盐 

分 类 号：X513[环境科学与工程—环境工程]