A method for joint methane vertical profile retrieval from atmospheric spectra in the thermal and near-infrared regions
I.V. Zadvornykh1, K.G. Gribanov1, V.I. Zakharov1, R. Imasu2
1Institute of Natural Sciences, 620083, 51 Lenina, Ekaterinburg, Russia
2Atmosphere and Ocean Research Institute, General Research Building Room No. 315b, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba 277-8568, Japan
Keywords: дистанционное зондирование, спектры атмосферы, обратная задача, метан
Abstract
A method of solution of the inverse problem of satellite sounding of the atmosphere for the retrieval of vertical profiles of optically active gas concentrations from high resolution atmospheric spectra in thermal and near infrared ranges jointly is presented. To demonstrate the capabilities of the method, a computational experiment was performed to retrieve the vertical profile of the main methane isotopologue with simultaneous use of synthetic spectra in the thermal and near-infrared regions. The spectra simulated reproduce the spectra measured by TANSO-FTS/GOSAT IR Fourier spectrometers. The signal-to-noise ratio in the spectra was set at 350. The model experiments show higher accuracy of retrieval of the methane vertical profile and its total column in case of joint use of both spectral bands (thermal and near-IR) in comparison with the use of each band separately.
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