Retrieval of 13CH4 atmospheric content and CH4 isotopologues ratio from ground-based measurements of solar spectra

A. M. Trifonova-Yakovleva; T. Yu. Chesnokova; A. V. Chentsov; N. V. Rokotyan; K. G. Gribanov; I. V. Zadvornyh; V. I. Zakharov

doi:10.1117/12.2645081

7 December 2022 Retrieval of ¹³CH₄ atmospheric content and CH₄ isotopologues ratio from ground-based measurements of solar spectra

A. M. Trifonova-Yakovleva, T. Yu. Chesnokova, A. V. Chentsov, N. V. Rokotyan, K. G. Gribanov, I. V. Zadvornyh, V. I. Zakharov

Author Affiliations +

Proceedings Volume 12341, 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 123411L (2022) https://doi.org/10.1117/12.2645081
Event: 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 2022, Tomsk, Russia

Abstract

Atmospheric monitoring of methane shows that CH₄ concentration growth since 2007 is accompanied by C¹³/C¹² isotopic delta ratio shift to more negative values due to ¹³CH₄ content depletion. In the work, the atmospheric total column amount and vertical profiles of ¹³CH₄ and ¹²CH₄ are retrieved from the ground-based measurements of solar spectra in Kourovka observatory. The CH₄ isotopologues ratio is calculated. The error of the isotopologues content retrieval is estimated for different spectral regions. On basis of the obtained results, optimal spectral windows were found.

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A. M. Trifonova-Yakovleva, T. Yu. Chesnokova, A. V. Chentsov, N. V. Rokotyan, K. G. Gribanov, I. V. Zadvornyh, and V. I. Zakharov "Retrieval of ¹³CH₄ atmospheric content and CH₄ isotopologues ratio from ground-based measurements of solar spectra", Proc. SPIE 12341, 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 123411L (7 December 2022); https://doi.org/10.1117/12.2645081

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