大气甲烷超光谱探测敏感性研究  

Sensitivity Study of Atmospheric Methane Hyperspectral Detection

作　　者：叶松[1,3] 马丽 熊伟[2,4] 李大成 吴军[2,4] 罗海燕[2,4] 李树 王新强[1,3] 王方原[1,3] YE Song;MA Li;XIONG Wei;LI Da-cheng;WU Jun;LUO Hai-yan;LI Shu;WANG Xin-qiang;WANG Fang-yuan(School of Optoelectronic Engineering,Guilin University of Electronic Technology,Guilin 541004,China;Anhui Province Key Laboratory of Optical Quantitative Remote Sensing,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China;Guangxi Key Laboratory of Optoelectronic Information Processing,Guilin 541004,China;University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]桂林电子科技大学光电工程学院,广西桂林541004 [2]中国科学院合肥物质科学研究院光学定量遥感安徽省重点实验室,安徽合肥230031 [3]广西光电信息处理重点实验室,广西桂林541004 [4]中国科学技术大学,安徽合肥230026

出　　处：《光谱学与光谱分析》2025年第4期1082-1087,共6页Spectroscopy and Spectral Analysis

基　　金：国家重点研发计划项目(2022YFB3901800,2022YFB3901803);中央引导地方科技发展资金项目(桂科ZY23055017)资助。

摘　　要：甲烷是大气中含量增长较快的气体,随着人类工业排放和畜牧业的发展,甲烷气体排放日益增加,且对全球变暖的影响值是二氧化碳的数倍,因此对甲烷的精准检测是应对环境问题的重点与热点。利用SCIATRAN辐射传输模型仿真高分辨率光谱的辐射传输过程,通过控制单一变量改变不同的观测几何和地表参数及气溶胶参数,仿真近地面不同条件的探测环境对甲烷在1.6μm波段的辐亮度光谱变化情况,分析甲烷探测过程中的敏感性参数,研究针对甲烷光谱探测过程中高灵敏度参数和低灵敏度参数进行敏感性结果分析。研究结果表明:太阳天顶角对甲烷辐亮度的影响较为显著,天顶角变化的影响比例高达83%。观测高度在近地面的变化对于甲烷辐亮度光谱的影响最小可忽略不计。气溶胶类型对甲烷辐亮度光谱的影响较小,其中农村型气溶胶和无气溶胶条件下的甲烷辐亮度光谱差距较小;气溶胶光学厚度对甲烷辐亮度光谱的影响成规律性,光学厚度数值增加时,甲烷辐亮度数值随之减小。地表参数对甲烷辐亮度光谱的影响最大,其中不同地表植被覆盖类型之间甲烷辐亮度差值达到66%。不同地表反照率下的甲烷辐亮度也呈规律性变化,地表反照率数值越高,甲烷辐亮度光谱数值越大。研究还通过仿真数据与实测数据之间的对比,验证了SCIATRAN模型对于仿真甲烷光谱的可行性与准确性,为甲烷光谱的反演提供了敏感性数据分析。Methane is a gas whose content in the atmosphere is growing fast.With the development of human industrial emissions and animal husbandry,methane gas emissions are increasing,and the value of its impact on global warming is several times higher than that of carbon dioxide,so the accurate detection of methane is a focus and hotspot to cope with environmental problems.This study uses the SCIATRAN radiative transfer model to simulate the radiative transfer process of high-resolution spectroscopy.By controlling a single variable to change different observation geometries surface parameters and aerosol parameters,we simulate the changes of irradiance spectra of methane in the 1.6-band under different conditions of the near-surface detection environment and analyze the sensitivity parameters in the process of methane detection and study the sensitivity parameters for the process of detecting methane spectra.The sensitivity results are analyzed for high and low sensitivity parameters in detecting methane spectra.The results show that the solar zenith angle significantly affects the methane irradiance,and the influence of zenith angle change is as high as 83%.The variation of observation altitude near the ground has the least negligible effect on the methane irradiance spectra.The effect of aerosol type on the methane irradiance spectra is small,and the difference between the methane irradiance spectra under rural aerosol and no aerosol conditions is small;the effect of aerosol optical thickness on the methane irradiance spectra is regular,and the methane irradiance decreases when the value of optical thickness increases.Surface parameters had the greatest influence on the methane irradiance spectra,with a 66%difference in methane irradiance between different surface vegetation cover types.The methane irradiance at different surface albedos also varied regularly,with higher values of surface albedo leading to larger values of methane irradiance spectra.The study also verified the feasibility and accuracy of the SCIATRAN m

关 键 词：甲烷 SCIATRAN模型 气溶胶光学厚度 地表反照率 

分 类 号：P412[天文地球—大气科学及气象学]