Diurnal behavior of the carbon dioxide flux and change in the isotopic ratio δ13C in surface and near-bottom water in littoral of Lake Baikal

Mikhail V. Panchenko; Valentina M. Domysheva; Natalia L. Padalko; Eugenii V. Chernikov; Maxim I. Prazdnichnykh; Alexander G. Tumakov; Dmitrii A. Pestunov

doi:10.1117/12.2075244

25 November 2014 Diurnal behavior of the carbon dioxide flux and change in the isotopic ratio δ¹³C in surface and near-bottom water in littoral of Lake Baikal

Mikhail V. Panchenko, Valentina M. Domysheva, Natalia L. Padalko, Eugenii V. Chernikov, Maxim I. Prazdnichnykh, Alexander G. Tumakov, Dmitrii A. Pestunov

Author Affiliations +

Proceedings Volume 9292, 20th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 92922X (2014) https://doi.org/10.1117/12.2075244
Event: 20th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 2014, Novosibirsk, Russian Federation

Abstract

Lake Baikal is one of the unique natural environments in Siberia which, to a large extent, affects the state of the nature in this region. The processes of gas exchange in the “water-atmosphere” system have been studied in Lake Baikal since 2002. The main purpose of the integrated investigations of exchange of carbon-containing gases in the water-atmosphere system in Lake Baikal is to study the contribution of physical, chemical, and biological components of the process and their interrelation with the intensity and rhythms of the fluxes. In 2013, the integrated measurements in the littoral area of Baikal were complemented with studies of the diurnal dynamics of isotopic ratio δ ¹³C in the surface and near-bottom water, which were not yet performed in Baikal before. In this work, we analyze first results of the joint analysis of СО₂ fluxes in the “atmosphere - water surface” system and δ ¹³C, obtained in August 2013 in the littoral area of South Baikal. It is shown that d¹³C markedly increases in the surface waters at daylight time. In nighttime period, there takes place a reverse process, when δ ¹³C of the surface water approaches δ ¹³C, which is recorded for near-bottom water.

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Mikhail V. Panchenko, Valentina M. Domysheva, Natalia L. Padalko, Eugenii V. Chernikov, Maxim I. Prazdnichnykh, Alexander G. Tumakov, and Dmitrii A. Pestunov "Diurnal behavior of the carbon dioxide flux and change in the isotopic ratio δ¹³C in surface and near-bottom water in littoral of Lake Baikal", Proc. SPIE 9292, 20th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 92922X (25 November 2014); https://doi.org/10.1117/12.2075244

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KEYWORDS

Carbon

Statistical analysis

Methane

Gases

Chemical analysis

Atmospheric optics

Carbon dioxide

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