基于多轴差分吸收光谱技术的最优估算法反演气溶胶消光廓线研究  

Aerosol Extinction Retrieved with Optical Estimation Algorithm Based on Multi-axis Differential Optical Absorption Spectroscopy

作　　者：牟福生[1] 雒静[1] 李素文[1] 王家伟 施瑞瑞 韦民红[1] MOU Fu-sheng;LUO Jing;LI Su-wen;WANG Jia-wei;SHI Rui-rui;WEI Min-hong(The College of Physics and Electronic Information, Huaibei Normal University, Huaibei , Anhui 235000, Chin)

机构地区：[1]淮北师范大学物理与电子信息学院,安徽淮北235000

出　　处：《光子学报》2018年第7期231-236,共6页Acta Photonica Sinica

基　　金：国家自然科学基金(Nos.41705012;41475017;61275151;91544104;11504121);国家高技术研究发展计划(Nos.2014AA06A511;2014AA06A508);安徽省自然科学基金(Nos.1308085QF124;1508085QD71);安徽省高校自然科学基金(Nos.KJ2017B013;KJ2017A381)资助~~

摘　　要：研究了多轴差分吸收光谱技术的气溶胶消光系数垂直廓线反演方法,基于非线性最优估算法,通过地基多轴差分吸收光谱仪观测的O4气体差分斜柱浓度,结合大气辐射传输模型,反演气溶胶消光廓线和光学厚度.2017年7月和8月在淮北地区开展了外场观测实验,低仰角(小于15°)的O4差分斜柱浓度模拟结果和测量结果相关性高于0.9,较好反演了对流层的气溶胶状态.研究表明淮北地区夏季气溶胶含量整体较低,出现的两天高值天气(7月24日和8月12日)的光学厚度日均值为0.65和0.59,分别为季节均值的1.6倍和1.4倍.通过气溶胶消光廓线时序图可知,两天的气溶胶高值都位于0.5km以下,污染主要为本地积累产生.A method for retrieving aerosol extinction coefficient vertical profile based on multi-axis differential absorption spectroscopy was studied, which is based on nonlinear optimal estimation algorithm.The aerosol extinction profile and optical thickness are retrieved from the concentration of O4 gas differential diagonal column,combined with the atmospheric radiation transmission model,by the multi axis differential absorption spectrometer.Field observation experiments were carried out in Huaibei area in July and August,2017.The difference between the simulated results of O4 differential column with low elevation angle（less than 15 degrees）is higher than 0.9,and the aerosol state of troposphere is well retrieved.The study shows that the overall aerosol content in Huaibei is low in summer,and the daily average optical thickness of the two day high value weather（July 24 th and August 12 th）is 0.65 and0.59,respectively,1.6 times and 1.4 times the seasonal average.Through the aerosol extinction profile time series,we can see that the high values of aerosol over two days are below 0.5 km,and the pollution is mainly caused by local accumulation.

关 键 词：大气光学 MAX-DOAS 最优估算法 气溶胶 柱浓度 

分 类 号：X122[环境科学与工程—环境科学]