Bubble gas escapes from the bottom of Lake Baikal, dependence of gas flare height on methane flux
Abstract
The paper summarizes the results of echolocation measurements of gas flux from the bubble gas escapes at the bottom of Lake Baikal, obtained in 2005—2014. For the first time the relationship between the height of the acoustic image of the rising bubbles jet and the corresponding methane flux was established. An analysis of this dependence shows that all gas flares are divided into three groups depending on their depth: shallow, intermediate and deep gas seeps. The results of unique observations of three events of gas eruption are discussed. It is shown that the methane flux in the first emissions was by more than an order of magnitude higher than the average, typical for the steady-state emission regime. The range of bubbles radii variation was estimated by ascent rate of bubbles clouds boundaries localized by depth.
Supporting agencies: We would like to thank members of the Limnology Institute, especially M. A. Grachev, L. Z. Granina, A. A. Zhdanov, M. N. Shimaraev, V. Tsekhanovsky, N. G. Melnik, S. Alekhin and the crews of the R/V G. Yu. Vereshchagin and R/V G. Titov for their help. This work was supported by grant RFBR 16-35-00363 mol_a, and budget project VIII.76.1.5.
About the Authors
M. M. Makarov
Limnological Institute Siberian Branch of the RAS
Russian Federation
Russian Federation
Irkutsk
S. I. Muyakshin
Lobachevsky State University of Nizhny Novgorod
Russian Federation
Russian Federation
Nizhny Novgorod
K. M. Kucher
Limnological Institute Siberian Branch of the RAS
Russian Federation
Russian Federation
Irkutsk
I. A. Aslamov
Limnological Institute Siberian Branch of the RAS
Russian Federation
Russian Federation
Irkutsk
R. Y. Gnatovsky
Limnological Institute Siberian Branch of the RAS
Russian Federation
Russian Federation
Irkutsk
N. G. Grani
Limnological Institute Siberian Branch of the RAS
Russian Federation
Russian Federation
Irkutsk
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Review
For citations:
Makarov M.M., Muyakshin S.I., Kucher K.M., Aslamov I.A., Gnatovsky R.Y., Grani N.G. Bubble gas escapes from the bottom of Lake Baikal, dependence of gas flare height on methane flux. Fundamental and Applied Hydrophysics. 2016;9(3):32-41.
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