光学学报, 2013, 33 (10): 1001001, 网络出版: 2013-10-20   

大气中水汽柱浓度的直射太阳光红外吸收光谱遥测研究 下载: 505次

Study on Remote Sensing of Water Vapor Column Concentration in the Atmosphere by Direct-Sun Infrared Absorption Spectroscopy
作者单位
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, 安徽 合肥 230031
摘要
研制了一种地基傅里叶变换红外光谱遥测系统,自动记录了晴天的太阳近红外吸收光谱,从该光谱中实时获得了整层大气透射率,进而采用最优化方法从该透射率中反演出了测量站点地区大气中2011年10月17日到2013年3月6日期间的整层水汽柱浓度含量。由该地基遥感技术获得的高时间分辨率整层水汽柱浓度与太阳辐射计的测量结果相比较,两者具有较好的一致性,相关系数达92%。测量站点地区的水汽柱浓度日变化很大并且没有明显周期性,日变化的复杂特征与多种因素有关。由于大气环流、季节温度变化等因素影响,测量站点地区水汽柱浓度呈现出明显季节周期特征,夏季明显高于冬季。这些结果对于水汽探测和分析方法的研究应用具有重要意义。
Abstract
A remote sensing system of ground-based Fourier transform infrared spectrometer is developed, automatically recording solar near infrared absorption spectra on sunny day. The real-time whole atmospheric transmittance spectrum is obtained through the recorded single spectrum. Based on the optimization method, total column concentrations of water vapor in the atmosphere are retrieved from the transmittance spectra on the observation site between October 17, 2011 and March 6, 2013. Total column concentrations of water vapor, obtained by the ground-based remote sensing technology with high temporal resolution, are compared with the ones by solar radiometer. They agree very well with each other and the correlation coefficient is 92%. Total column concentrations of water vapor change a lot during a day in the measurement site area, and there is no obvious periodicity. The characteristics of diurnal variation are complex and associated with many factors. Owing to factors such as atmospheric circulation and seasonal variation of temperature, total column concentrations of water vapor show the characteristic of obvious seasonal cycle in the measurement site area, which is significantly higher in summer than in winter. These results are significant to the research and application of water vapor detection and analysis method.

程巳阳, 高闽光, 徐亮, 李胜, 金岭, 童晶晶, 刘建国, 刘文清. 大气中水汽柱浓度的直射太阳光红外吸收光谱遥测研究[J]. 光学学报, 2013, 33(10): 1001001. Cheng Siyang, Gao Minguang, Xu Liang, Li Sheng, Jin Ling, Tong Jingjing, Liu Jianguo, Liu Wenqing. Study on Remote Sensing of Water Vapor Column Concentration in the Atmosphere by Direct-Sun Infrared Absorption Spectroscopy[J]. Acta Optica Sinica, 2013, 33(10): 1001001.

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