红外辐射光谱反演CO_2浓度的敏感性研究  

Sensitivity Research of CO_2 Retrieval of Infrared Radiative Spectra

作　　者：胡振华[1] 方芳[1] 顾学军[1] 方黎[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所环境光谱学研究室,安徽合肥230031

出　　处：《大气与环境光学学报》2010年第4期269-275,共7页Journal of Atmospheric and Environmental Optics

基　　金：中国科学院知识创新工程重要方向项目(KGCX2-YW-418-3)资助

摘　　要：机载高分辨率光谱数据的测量具有空间分辨率高、信息量大的特点,且高光谱数据反演低层大气CO_2浓度的灵敏度高。通过高分辨率大气辐射软件的数值模拟计算,使用1.57μm(6315～6385 cm^(-1))波段反射的太阳光反演CO_2浓度。研究结果表明只要探测器的信噪比(SNR)达到700:1和分辨率达到0.07 cm^(-1),可以探测到很小的CO_2(1%,3.3 ppmv)变化。并分析了大气中的气溶胶和地表温度的变化对高分辨率CO_2光谱数据的影响。Airborne measurements of high-resolution spectral data are an innovative technology with high spatial resolution and informative features, and the high-resolution spectral data have high sensitivity of retrieving CO2 concentration near the surface of earth. The high-resolution atmospbvric radiation software is used to calculate and choose the 1.57 μm （6315-6385 cm-1） waveband CO2 high-resolution spectra to retrieve CO2 concentration. The results show that the high-resolution spectral data can detect very small CO2 （1%） changes with sufficient signal to noise ratio and resolution. Also the effects of aerosols in atmospheric and surface temperature change on the high-resolution spectral data of CO2 are analyzed.

关 键 词：大气辐射传输 CO2 数值模拟 

分 类 号：P407.6[天文地球—大气科学及气象学]