Spectral measurements of the outgoing thermal IR radiation carried out in 1977 and 1979 (SI-1 instrument, Meteor satellite) are used for estimating the CO2 content in the Earth’s atmosphere. A special algorithm based on the technique of artificial neural networks has been developed for solving the inverse problem of determining the CO2 content. The algorithm uses experimental spectra, as well as data on temperature and humidity from the NCEP CFSR reanalysis archive. Despite the presence of a noticeable variation in individual values of CO2 content in 1977 and 1979 (330–350 ppm), the estimates clearly demonstrate the seasonal variations of the carbon dioxide content for Europe and low values for the Southern Hemisphere. The spatial and temporal averaging of the retrieved CO2 estimates gives mean winter and spring–summer values for the European region at 338.2 and 336.5 ± 3.1 ppmv, correspondingly, which is in a good agreement with the ground-based measurements at Mauna Loa station.

中文翻译：

---

地球大气中二氧化碳的首次卫星测量（来自 1979 年流星卫星上的 SI-1 光谱仪）

1977 年和 1979 年进行的红外热辐射光谱测量（SI-1 仪器，流星卫星）用于估算地球大气中的 CO2 含量。已经开发了一种基于人工神经网络技术的特殊算法来解决确定 CO2 含量的逆问题。该算法使用实验光谱，以及来自 NCEP CFSR 再分析档案的温度和湿度数据。尽管 1977 年和 1979 年 CO2 含量的个别值（330-350 ppm）存在显着变化，但估计清楚地表明了欧洲二氧化碳含量的季节性变化和南半球低值。