摘要
临边辐射探测技术是一种新型卫星探测技术,主要利用紫外-可见光-红外太阳散射光谱获得臭氧等痕量气体在垂直方向上的分辨率廓线信息。基于波长配对光谱分析法、乘代数重建技术以及SCIATRAN正向模型,用SCIAMACHY仪器临边辐射反演垂直高度为10~40 km、分辨率为1 km的臭氧数密度。首先,根据臭氧在Chappuis-Wulf波段的吸收特性分析波长配对的机理,并结合临边辐射权函数确定臭氧反演的波长和反演范围。然后,分析了几种典型的波长配对组合对反演结果的影响,确定一组较好的波长配对组合。最后,对迭代算法反演过程中的误差来源如迭代次数、先验廓线、切线高度和NO_(2)浓度参量进行不同程度的偏差反演,误差结果表明,这些参数都会明显影响垂直高度小于20 km的臭氧廓线反演结果。
Limb radiation detection is a new type of satellite detection technology,which mainly uses ultraviolet-visible-infrared solar scattering spectrum to obtain the vertical resolution profile information of trace gases such as ozone.In this paper,based on wavelength pairing spectral analysis method,multiplicative algebraic reconstruction technology,and SCIATRAN forward model,the ozone number density with vertical height of 10--40 km and resolution of 1 km is retrieved by using the limb radiation of SCIAMACHY instrument.First,according to the absorption characteristics of ozone in Chappuis-Wulf band,the mechanism of wavelength pairing is analyzed,and the wavelength and inversion range of ozone inversion are determined by combining the limb radiation weighting function.Then,the influence of several typical wavelength pairing combinations on the inversion results are analyzed,and a group of better wavelength pairing combination is determined.Finally,the error sources in the inversion process of iterative algorithm,such as iteration times,prior profile,tangent height and NO_(2) concentration are inversed in different degrees.The error results show that these parameters will affect the inversion results of ozone profile with vertical height less than 20 km.
作者
朱芳
司福祺
詹锴
窦科
周海金
Zhu Fang;Si Fuqi;Zhan Kai;Dou Ke;Zhou Haijin(Centre of Environmental Optics,Anhui Institute of Optics and Fine Mechanics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei,Anhui 230031,China;University of Science and Technology of China,Hefei,Anhui 230026,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2021年第4期33-42,共10页
Acta Optica Sinica
基金
国家重点研发计划(2019YFC0214702、2017YFB0503901)
国家自然科学基金(41705016)。
关键词
大气光学
临边辐射
波长配对
乘代数重建技术
臭氧廓线
反演
atmospheric optics
limb radiation
wavelength pairing
multiplicative algebraic reconstruction technique
ozone profile
inversion
