E3S Web Conf.
Volume 62, 2018IX International Conference “Solar-Terrestrial Relations and Physics of Earthquake Precursors”
|Number of page(s)||10|
|Section||Atmosphere Physics and Solar-Terrestrial Relations|
|Published online||07 November 2018|
Resonant scattering by excited ions as an indicator of the precipitation of charged particles into the atmosphere
Institute of Cosmophysical Research and Radio Wave Propagation of the Far Eastern Branch of Russian Academy of Sciences, Paratunka, Russia
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The results of two-frequency lidar sounding of the atmosphere from the altitudes of 100-500 km are presented. The data were obtained in 2017 at a lidar site located in Kamchatka. One lidar channel is applied to investigate the aerosol formations in the middle atmosphere and to issue the resonance scattering on excited ions of atomic nitrogen in the upper atmosphere. Nd:YAG laser operating on the wavelength of 532 nm is used in this channel. A dye laser with tunable frequency is applied in the second channel. The wavelength of 561.1 nm corresponds to the chosen dipole transition between the excited states of atomic oxygen. Defined light-scattering layers were discovered in the region of 200-400 km. They are caused by presence of excited states of atomic oxygen and nitrogen ions.
The possibility of reconstruction of excited ions Nh-profile and determination of precipitated electron fluxes spectra by the lidar method is shown. The possibility of manifesting resonance scattering and formation of imaginary aerosol layers in the middle atmosphere is discussed.
Key words: atmosphere / ionosphere / lidar / sounding / scattering
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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