Vertical profile of aerosol extinction based on the measurement of O_4 of multi-elevation angles with MAX-DOAS
Vertical profile of aerosol extinction based on the measurement of O_4 of multi-elevation angles with MAX-DOAS
复制标题
基于O-4多仰角MAX-DOAS测量的气溶胶消光垂直剖面
DOI：
10.1088/1674-1056/28/8/084212
复制
发表时间：
2019
影响因子：
1.7
通讯作者：
Hu Lisha
中科院分区：
文献类型：
--
作者：
Mou Fusheng;Luo Jing;Li Suwen;Shan Wei;Hu Lisha
研究了一种基于查找表算法的地基多轴差分光吸收光谱（MAX-DOAS）反演气溶胶消光剖面的方法。该算法采用参数化方法表示气溶胶消光剖面，通过大气辐射传输模型模拟不同的大气气溶胶状态。基于该方法，获得了6个无云天的气溶胶消光剖面。将MAX-DOAS测量的O_4微分空气质量因子(dAMF)与不同大气条件下相应的模型结果进行比较(R~2=0.78)。经过极小化和查表法后得到气溶胶光学厚度、边界层气溶胶权重因子和边界层高度。将反演的边界层气溶胶消光与地面点仪器测量的 PM2.5 数据进行比较。两种方法的日变化趋势吻合较好。当气溶胶光学厚度小于0.5时，两种方法的相关系数为0.71。结果表明，查表法可以获取对流层气溶胶状态，为其他仪器数据提供验证。
A method for aerosol extinction profile retrieval using ground-based multi-axis differential optical absorption spectroscopy (MAX-DOAS) is studied, which is based on a look-up table algorithm. The algorithm uses parametric method to represent aerosol extinction profiles and simulate different atmospheric aerosol states through atmospheric radiation transfer model. Based on the method, aerosol extinction profile was obtained during six cloud-free days. The O_4 differential air mass factor (dAMF) measured by MAX-DOAS is compared with the corresponding model results under different atmospheric conditions (R~2= 0.78). The aerosol optical thickness, aerosol weight factor in boundary layer, and the height of the boundary layer are obtained after the process of minimization and look-up table method. The retrieved aerosol extinction in boundary layer is compared with PM2.5 data measured by ground point instrument. The diurnal variation trends of the two methods are in good agreement. The correlation coefficients of the two methods are 0.71 when the aerosol optical thickness is smaller than 0.5. The results show that the look-up table method can obtain the aerosol state of the troposphere and provide validation for other instrument data.