南京北郊2011年春季气溶胶粒子的散射特征  

Scattering properties of aerosol in north suburb of Nanjing in spring 2011

作　　者：于兴娜[1,2] 袁帅 马佳[2] 徐惟琦[2] 谭成好[2] 毛志远[2] 康娜[1,2] 

机构地区：[1]南京信息工程大学中国气象局气溶胶与云降水重点开放实验室,江苏南京210044 [2]南京信息工程大学大气物理学院,江苏南京210044 [3]湖南省益阳市安化县气象局,湖南安化413500

出　　处：《大气科学学报》2013年第3期354-360,共7页Transactions of Atmospheric Sciences

基　　金：国家自然科学基金资助项目(41005089);高等学校博士学科点专项科研基金(20103228120004);江苏省高校自然科学基金项目(10KJB170009;10KJB170008);国家级大学生创新创业训练计划项目(201210300021);江苏省高等学校大学生实践创新训练计划项目(2012JSSPITP0826);江苏省高校“青蓝工程”资助项目;南京信息工程大学校科研基金项目(20100346);江苏高校优势学科建设工程资助项目(PAPD)

摘　　要：利用南京北郊2011年春季积分浊度仪的观测资料,结合PM2.5质量浓度、能见度和常规气象资料,分析了南京北郊春季气溶胶散射系数的变化特征、散射系数与PM2.5质量浓度和能见度的关系。结果表明,观测期间气溶胶散射系数平均值为311.5±173.3Mm-1,小时平均值出现频率最高的区间为100～200Mm-1;散射系数的日变化特征明显,总体为早晚大,中午及午后小。散射系数与PM2.5质量浓度的变化趋势基本一致,但与能见度呈负相关关系。霾天气期间散射系数日平均值为700.5±341.4Mm-1,最高值达到近1900Mm-1;结合地面观测资料、NCEP/NCAR再分析资料和后向轨迹模式分析显示,霾期间气块主要来自南京南部和东南方向。Based on the aerosol scattering properties observed by the integrating Nephelometer in the north suburb of Nanjing in spring 2011, combined with data of PM2 s mass concentration, visibility and routine weather observation, the variation features of aerosol scattering coefficients and its correlation with PMz 5 mass concentration and visibility were analyzed. Results show that the mean aerosol scattering coefficient is 311.5 ± 173.3 Mm- 1 and the maximum frequency distribution of hourly mean scatter- ing coefficient is 100--200 Mm^-1. The diurnal variation of aerosol scattering coefficient is obvious, and higher（lower） in the morning and evening（ at noon and in the afternoon）. The trend variation of scat- tering coefficient shows an agreement with the mass concentration of PM2. 5, and a negative correlation with the visibility. The daily mean aerosol scattering coefficient in the hazy day is up to 700. 5 ± 341.4 Mm^-1, and the maximum value reaches about 1 900 Mm^-1. The analysis of ground observations, NCEP/NCAR reanalysis data and simulated back trajectories of air parcels shows that the air parcels mainly come from south and southeast of Nanjing in the hazy day.

关 键 词：气溶胶 散射系数 霾 PM2 5 南京 

分 类 号：X831[环境科学与工程—环境工程]