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采用加权函数修正的差分光学吸收光谱反演环境大气中的CO2垂直柱浓度
引用本文:孙友文,谢品华,徐晋,周海金,刘诚,王杨,刘文清,司福祺,曾议.采用加权函数修正的差分光学吸收光谱反演环境大气中的CO2垂直柱浓度[J].物理学报,2013,62(13):130703-130703.
作者姓名:孙友文  谢品华  徐晋  周海金  刘诚  王杨  刘文清  司福祺  曾议
作者单位:1. 中国科学院安徽光学精密机械研究所环境光学与技术重点实验室, 合肥 230031;2. 哈佛大学哈佛-史密松天体物理研究中心, 美国 MA
摘    要:采用加权函数修正的差分光学吸收光谱技术(weighting function modified differential optical absorption spectroscopy, WFM-DOAS)测量环境大气中的CO2垂直柱浓度. 以直射太阳光测量光谱为例, 演示了WFM-DOAS算法的实现过程. 将环境大气分为50层, 借助辐射传输模拟软件SCIATRAN对各个测量光谱进行了模拟计算, 获得了最小二乘法拟合所需的目标气体CO2及干扰气体H2O、CH4 的柱权重函数和太阳归一化光谱常量. 采用WFM-DOAS方法对一整天的直射太阳光测量光谱进行了反演, 得到的反演误差均小于3%. 最后比较了两种不同DOAS算法对同一条测量光谱的反演结果, 验证了WFM-DOAS算法在红外被动气体遥感的优越性. 关键词: 环境污染监测 光学测量技术 红外光谱 温室气体

关 键 词:环境污染监测  光学测量技术  红外光谱  温室气体
收稿时间:2012-12-06

Measurement of atmospheric CO2 vertical column density using weighting function modified differential optical absorption spectroscopy
Sun You-Wen,Xie Pin-Hua,Xu Jin,Zhou Hai-Jin,Liu Cheng,Wang Yang,Liu Wen-Qing,Si Fu-Qi,Zeng Yi.Measurement of atmospheric CO2 vertical column density using weighting function modified differential optical absorption spectroscopy[J].Acta Physica Sinica,2013,62(13):130703-130703.
Authors:Sun You-Wen  Xie Pin-Hua  Xu Jin  Zhou Hai-Jin  Liu Cheng  Wang Yang  Liu Wen-Qing  Si Fu-Qi  Zeng Yi
Abstract:In this paper, we demonstrate a method of atmospheric CO2 vertical column density (VCD) retrieval by using weighting function modified differential optical absorption spectroscopy (WFM-DOAS). Direct sun measurement serves as an example for WFM-DOAS fitting. The atmosphere is divided into 50 layers in the process of WFM-DOAS retrieval, while the simulated sun-normalized radiance and the total weighting functions (CO2, H2O and CH4) for each measurement are computed in terms of the radiative transfer model (RTM) SCIATRAN by using the HITRAN data base and the solar spectrum from Livingston and Wallace (1991). The CO2 vertical column density time series were obtained by utilizing WFM-DOAS fitting method to all direct sun measurement spectra. Fitting errors are all less than 3%. Fitting results for two different DOAS algorithms are compared with each other. It is indicated that the WFM-DOAS technique has the potential of being applied in passive gas remote sensing in the infrared region.
Keywords: environmental pollution Measurements optical measurement techniques infrared spectrum greenhouse gas
Keywords:environmental pollution Measurements  optical measurement techniques  infrared spectrum  greenhouse gas
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