摘要
分别以干燥环境下的平均单位质量气溶胶消光系数和湿环境下烘干气溶胶的散射消光系数为基准,提出了与之对应的两种气溶胶消光吸湿增长因子f1(RH)和f2(RH)。基于成都市2017年10—12月浊度仪和黑碳仪的逐时观测资料以及该时段同时次的环境气象监测数据(大气能见度、相对湿度以及NO2和PM(10)的质量浓度),针对上述两种气溶胶消光吸湿增长因子进行了系统的对比分析。主要结论如下:1)f1(RH)和f2(RH)均能表征气溶胶吸湿性的光学效应,二者的判决系数为0.90(通过了α=0.01的显著性检验);2)多模型的比对结果表明,二次多项式函数较好地拟合了f1(RH)和f2(RH)随相对湿度的变化特征;3)f1(RH)和f2(RH)的均值之比随相对湿度的增加而增大。进一步研究指出,烘干气溶胶的散射消光系数对相对湿度变化的显著响应关系是导致f1(RH)和f2(RH)非一致性演化的根本原因。
Based on the references of average aerosol extinction coefficient per unit mass concentration in dry environment and baked aerosol scattering extinction coefficient in wet environment respectively,corresponding the two kinds of aerosol extinction hygroscopic growth factor,i.e.f1(RH)and f2(RH),had been proposed.By utilizing the hourly data from nephelometer and aethalometer,as well as the coincidental environmental and meteorological data,including atmospheric visibility,relative humidity,NO2 mass concentration,and PM10 mass concentration,in Chengdu from October 2017 to December 2017,the comparative study on the two kinds of aerosol extinction hygroscopic growth factors was systematically carried out.The results showed that both f1(RH)and f2(RH)could well characterize the optical effect of aerosol hygroscopicity,and their coefficient of determination was 0.90(passed the significance test ofα=0.01).By multi-model comparison,the quadratic polynomial function was proved to best fit the variation of both f1(RH)and f2(RH)with relative humidity.The ratio of average f1(RH)to average f2(RH)increased with the increase of relative humidity.Further research indicated that the significant response of baked aerosol scattering extinction coefficient to the variation of relative humidity was fundamental for the above inconsistency between f1(RH)and f2(RH).
作者
张智察
倪长健
尹单丹
张莹
邓也
杨寅山
Zhang Zhicha;Ni Changjian;Yin Dandan;Zhang Ying;Deng Ye;Yang Yinshan(College of Atmospheric Science,Chengdu University of Information Technology,Chengdu.Sick uan 610225,China;Plateau Atmospheres and Environment Key Laboratory of Sichuan Province,Chengdu,Sich uan 610225,China;Chengdu Academy of Environmental Sciences,Chengdu,Sichuan 610072,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2020年第9期39-46,共8页
Laser & Optoelectronics Progress
基金
国家重点研发计划(2018YFC0214004,2018YFC1506006)
四川省科技厅重点研发项目(2018SZ0287,2018SZDZXX23)。
关键词
大气光学
气溶胶消光
吸湿增长因子
判决系数
二次多项式函数
非一致性
atmospheric optics
aerosol extinction
hygroscopic growth factor
coefficient of determination
quadratic polynomial function
inconsistency
