南京北郊大气细粒子中黑碳气溶胶的观测研究  

Observation of black carbon in fine particulate matter in the north suburb of Nanjing

作　　者：汤莉莉[1,2] 祝愿[1] 牛生杰[2] 朱彬[2] 陈敏东[1] 沈宏雷[1] 孙珍华[1] 李旭文[3] 张祥志[3] 

机构地区：[1]南京信息工程大学环境科学与工程学院,南京210044 [2]南京信息工程大学大气物理学院,南京210044 [3]江苏省环境监测中心,南京210029

出　　处：《环境科学学报》2011年第4期709-716,共8页Acta Scientiae Circumstantiae

基　　金：国家重点基础研究发展计划项目(No.2009CB426313);江苏省环境监测科研基金;江苏省"六大人才高峰"资助项目;南京信息工程大学校科研基金~~

摘　　要：运用2008年11月至2010年4月在南京北郊大气细粒子中黑碳气溶胶的观测结果,研究黑碳的时间序列演变特征、污染状况、与气体的非均相关系等.结果表明,黑碳气溶胶的日均浓度为1114～19408ng·m-3,局地人为活动与气象条件的改变等因素导致黑碳气溶胶日变化呈双峰形;黑碳气溶胶小时平均浓度频数统计和对数正态分布拟合的结果表明,南京北郊大气细粒子中黑碳最大频数浓度为2920ng·m-3,高于我国大部分地区.由2009年10月SO2、NO2、HNO2、O3的DOAS观测结果,研究其与黑碳气溶胶的关系,SO2、NO2和HNO2与黑碳气溶胶呈正相关,而O3与黑碳气溶胶呈明显负相关,相关系数分别为0.290、0.615、0.676和0.455.In this paper,the seasonal and diurnal variation characteristics of black carbon （BC） in PM2.5 and the effects of heterogeneous reactions of traces gases within BC were studied by using the data collected in a north suburb of Nanjing from November 2008 to April 2010.The results showed that daily averaged concentrations of BC ranged from 1114 to 19408 ng·m-3.There was a double-peak pattern in the diurnal variation of BC level,which can be attributed to local anthropogenic emission and atmospheric boundary layer diurnal changes.Based on statistical methods and lognormal curve fitting analysis,the background level of BC in the north suburb of Nanjing was 2920 ng·m-3,which was higher than that of most cities in China.Observational results of SO2,NO2,HNO2 and O3 by DOAS were used to analyze the correlation between trace gases and BC.There were positive correlations between BC and SO2,NO2 and HNO2,with correlation coefficients of 0.290,0.615 and 0.676,respectively.In contrast,a negative correlation was found between BC and O3,with a correlation coefficient of-0.455.

关 键 词：黑碳 大气细粒子 观测 南京北郊 

分 类 号：X513[环境科学与工程—环境工程]