Method for retrieval of HDO/H2O ratio vertical profile in the atmosphere from satellite spectra simultaneously measured in two spectral ranges: thermal and near-IR
I.V. Zadvornykh1, K.G. Gribanov1, N.Yu. Denisova1,2, V.I. Zakharov1,2, R. Imasu3
1Institute of Natural Sciences Ural Federal University named after the first President of Russia B.N. Yeltsin, Ekaterinburg, Russia
2N.N. Krasovskii Institute of Mathematics and Mechanics of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
3Atmosphere and Ocean Research Institute, The University of Tokyo, Tokyo, Japan
Keywords: remote sensing, inverse problem, water vapor isotopologues, GOSAT-2
Abstract
In this paper, we suggest an original method for solving the inverse problem of hyperspectral satellite sensing of the atmosphere to retrieve HDO/H2O ratio vertical profile in the atmosphere with simultaneous inversion of thermal and near-IR spectra. A computational experiment was performed to retrieve the vertical profile of relative abundance of HDO isotopologue in atmospheric water vapor using high-resolution simulated spectra with parameters of TANSO-FTS spectrometer onboard GOSAT-2 satellite. The inverse problem was solved by the optimal estimation method with simultaneous inversion of thermal and near-IR spectra. The output data of the isotopic version of the atmospheric general circulation model ECHAM6-wiso were used as a priori statistical data on water vapor isotopologue vertical profiles.
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