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大气中二氧化碳浓度持续增高导致环境和气候变化等问题成为人们关注的焦点.为了实时遥测二氧化碳气体柱浓度,研究了一种地基低分辨遥测系统和实时光谱数据反演分析方法.利用该系统在合肥地区进行了连续观测,从太阳吸收光谱中实时获取了整层大气透过率.采用逐线积分非线性最小二乘光谱反演算法,从整层大气透过率中反演了二氧化碳柱浓度和氧气柱浓度,并以氧气柱浓度为内标函数获得了二氧化碳干空气柱体积混合比,精密度优于3%.将2012年9月25日12时到15时本系统测量的二氧化碳干空气柱体积混合比均值与此时段过境本站点区域的日本温室气体卫星观测结果进行了比较,两者偏差小于1%.可见,该系统和方法具有很高的精密度和准确度,是一种有效的温室气体观测手段.
In order to real-time telemetry carbon dioxide gas column concentration, a low-resolution telemetry system on the ground and real-time spectral data inversion analysis method are studied.Using the system in Hefei Area was continuously observed and the whole atmospheric transmittance was obtained from the solar absorption spectrum in real time.The line-by-line integral nonlinear least-squares spectral inversion algorithm was used to invert the atmospheric concentration of carbon dioxide Oxygen column concentration, and the oxygen column concentration as an internal standard function to obtain the volume ratio of dry column of carbon dioxide, the precision is better than 3% .At the time of 12:00 to 15:00 on September 25, 2012 measured by the system of carbon dioxide dry air column The mean value of volume mixing ratio is compared with the results of Japan’s greenhouse gas (SST) satellite observations that cross this site during this period, and the deviation between the two is less than 1%. This shows that the system and method have high precision and accuracy and are effective Greenhouse gas observation means.