Near-infrared radiative transfer modelling with different CH4 spectroscopic databases to retrieve atmospheric methane total amount |
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| Authors: | TYu Chesnokova V Boudon T Gabard KG Gribanov K Firsov VI Zakharov |
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| Institution: | aLaboratoire Interdisciplinaire Carnot de Bourgogne, UMR 5209 CNRS-Université de Bourgogne, 9 Av. A. Savary, BP 47870, F-21078 Dijon Cedex, France;bV.E. Zuev Institute of Atmospheric Optics SB RAS, 1, Academician Zuev square, Tomsk 634021, Russia;cUral State University, 51 Lenin Avenue, Ekaterinburg 620000, Russia;dVolgograd State University, 100, prospekt Universitetsky, Volgograd, 400062, Russia |
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| Abstract: | Atmospheric methane content can be retrieved from measurements of solar radiation attenuated by the atmosphere in the near infrared spectral region where the space-borne and ground-based spectrometers carry out regular measurements. It is shown, in the present work, that the different spectroscopic databases can give significantly different results for both forward simulations of the atmospheric transmittance and the inverse problem solution to retrieve the CH4 total content in the atmosphere using spectra measured by ground-based FTIR spectrometer in the near infrared spectral region. These discrepancies and the problem of the reduction of their influence on the atmospheric radiation transfer calculations are discussed. A comparison of atmospheric ground-based measured and simulated spectra, modelled with different CH4 databases, is presented. |
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| Keywords: | Methane Atmospheric transmission Spectroscopic databases |
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