LIDAR Detection of Aerosols in the Tunnel above the Elbrus Volcano Chamber

300-percent spikes of lidar backscattering are detected for the first time in air of a dead-end underground adit over the Elbrus volcano magma chamber. The adit is at the Baksan Neutrino Observatory (BNO). It is revealed that short bursts (~2 h) of aerosol backscattering over the seasonal decreasing...

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Bibliographic Details
Published in:Bulletin of the Lebedev Physics Institute 2022-02, Vol.49 (2), p.36-41
Main Authors: Pershin, S. M., Sobisevich, A. L., Zavozin, V. A., Grishin, M. Ya, Lednev, V. N., Makarov, V. S., Petkov, V. B., Ponurovskii, Ya. Ya, Fedorov, A. N., Artemova, D. G.
Format: Article
Language:English
Subjects:
Adits
Aerosols
Backscattering
Chambers
Lidar
Magma
Neutrinos
Physics
Physics and Astronomy
Plumes
Temperature profiles
Volcanic activity
Volcanoes
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Summary:300-percent spikes of lidar backscattering are detected for the first time in air of a dead-end underground adit over the Elbrus volcano magma chamber. The adit is at the Baksan Neutrino Observatory (BNO). It is revealed that short bursts (~2 h) of aerosol backscattering over the seasonal decreasing trend coincide well with radon emission ( 222 Rn) and with a pulsed increase in air humidity by 2—3%. An inverted height temperature profile is measured in the BNO adit along with high concentration of heavy magmatic gases ( 12 СO 2 and 13 СO 2 ) emanating from the magma chamber. The measured data indicate that the observed lidar backscattering coefficient increase is due to pulsed generation of evaporation fog around magmatic gas plumes. Hence, the aerosol lidar might be recognized as an instrument highly sensitive to magmatic gas plumes above the volcanic chamber.
ISSN:1068-3356
1934-838X
DOI:10.3103/S1068335622020063