Retrieval of HDO relative content in atmosphere from simultaneous GOSAT-2 measurements in the thermal and near-IR
I.V. Zadvornykh1, K.G. Gribanov1, 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, Chiba, Japan
Keywords: remote sensing, inverse problem, water vapor isotopologues
Abstract
In with paper we demonstrate the application of original method for solving the inverse problem of hyperspectral satellite sensing to retrieval of the vertical profile of HDO/H2O ratio in the Earth's atmosphere with the simultaneous use of thermal and near-IR spectra is described. This method is used to retrieve relative abundance of HDO isotopologue (δD) in atmospheric water vapor from measurements of TANSO-FTS IR spectrometer onboard GOSAT-2 satellite for the first time. Retrieved δD-values are compared with data obtained at ground-based TCCON measurement station in Karlsruhe, Germany. The simultaneous use of satellite spectra of outgoing atmospheric radiation in the thermal range and reflected solar radiation in the near-IR shows a higher correlation between monthly average δD satellite values of and ground-based data.
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