基于MAX-DOAS的大气对流层SO_2垂直柱浓度遥测  

Measuring Tropospheric Vertical Column Density of SO_2 by Multi-Axis Differential Optical Absorption Spectroscopy

作　　者：田鑫[1,2] 李昂[2] 徐晋[2] 谢品华[1,2,3] 牟福生[2] 吴丰成[2] 胡肇焜 张琼[2] 王汝雯 TIAN Xin LI Ang XU Jin XIE Pinhua MOU Fusheng WU Fengcheng HU Zhaokun ZHANG Qiong WANG Ruwen(School of Environmental Science and Optoeclectronic Technology, University of Science and Technology of China, Hefei 230026, China Key Laboratory of Environment Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environmeat, Chinese Academy of Sciences, Xiamen 361021, China)

机构地区：[1]中国科学技术大学环境科学与光电技术学院,安徽合肥230026 [2]中国科学院安徽光学精密机械研究所中国科学院环境光学与技术重点实验室,安徽合肥230031 [3]中国科学院区域大气环境研究卓越创新中心中国科学院城市环境研究所,福建厦门361021

出　　处：《大气与环境光学学报》2017年第1期33-42,共10页Journal of Atmospheric and Environmental Optics

基　　金：国家863计划;2014AA06A508;2014AA06A511;国家自然科学基金;41530644;41405033;安徽省自然科学基金;1508085QD71~~

摘　　要：基于多轴差分吸收光谱技术(multi-axis differential optical absorption spectroscopy,MAXDOAS)获得了对流层SO_2垂直柱浓度。采用不同参考谱和不同波段来获得SO_2差分斜柱浓度,通过对比发现,当圈天顶光谱作为参考谱的反演误差最小,且全天相对稳定波动小,误差小于5%。通过六个波段的对比选取了最优反演波段为307.5~315 nm。结合地面气象数据对2015年10月14日~18日的污染过程进行了研究,数据分析表明风速和风向是影响监测点SO_2浓度的两个重要因素,城市和电厂产生的SO_2会在东风和南风的影响下向监测点输送.通过研究表明,MAX-DOAS能够准确反演大气对流层SO_2垂直柱浓度信息,对于探究城市大气对流层SO_2垂直柱浓度、卫星校验、模型校验以及污染输送的研究具有重要意义。The vertical column density （VCD） of tropospheric SO2 was obtained by using multi-axis differential optical absorption spectroscopy （MAX-DOAS）. And differential slant column density （dSCD） of SO2 was got by using different reference spectra and different wave bands. By comparison, the error and the variation of error was minimum when using the sequential reference, and the error was less than 5%. Six wave bands were selected and compared to determine the optimal retrieval wave band which was 307.5-315 nm. Combined with meteorological data, a contamination process from 14th to 18th, October, 2015 was studied. The data analysis showed that wind speed and direction were two important factors affecting the concentration of SO2 in monitoring site. The SO2 produced from city and power plants was transported to monitoring site under the influence of east and south wind. According to the research, MAX-DOAS can accurately inverse the atmospheric SO2 VCD, which has great significance for exploring the tropospheric SO2 VCD of the city, satellite calibration, model validation and studying pollution transport.

关 键 词：多轴差分吸收光谱技术 对流层SO2垂直柱浓度 最优反演波段 输送 

分 类 号：X511[环境科学与工程—环境工程]