Nonlinear Wave Structures and Plasma−Dust Effects in the Earth’s Atmosphere
- Авторлар: Izvekova Y.1,2, Popel S.1,3
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Мекемелер:
- Space Research Institute
- Moscow Institute of Physics and Technology
- National Research University Higher School of Economics
- Шығарылым: Том 44, № 9 (2018)
- Беттер: 835-839
- Бөлім: Ionospheric Plasma
- URL: https://journals.rcsi.science/1063-780X/article/view/186933
- DOI: https://doi.org/10.1134/S1063780X18090052
- ID: 186933
Дәйексөз келтіру
Аннотация
The interaction of charged dust grains with nonlinear vortical structures in the Earth’s atmosphere is analyzed. Certain aspects of the atmosphere−ionosphere interaction, in particular, mechanisms for the appearance of dust grains at ionospheric altitudes, are discussed. It is shown that, at certain altitudes, there are regions in the wavenumber space in which conditions leading to the excitation of acoustic−gravity waves are satisfied. The interaction of nonlinear acoustic−gravity waves with dust grains of meteoric origin at ionospheric altitudes, which leads to the mixing and redistribution of dust grains over the region where vortices exist, is investigated. The possibility of formation of vertical and horizontal dust flows in dusty ionospheric plasma as a result of modulational instability is analyzed. The dynamics of dust grains in dust devils frequently arising in the atmosphere above well-heated surfaces is modeled. The vortical structure of such a dust devil is characterized by a reduced pressure in the center, which facilitates the lifting of small dust grains from the surface. The formulated model is used to calculate the trajectories of dust grains in dust devils with allowance for the influence of the electric field generated in the vortex by colliding dust grains. The calculations show that dust devils play an important role in the transport of dust grains.
Авторлар туралы
Yu. Izvekova
Space Research Institute; Moscow Institute of Physics and Technology
Email: popel@iki.rssi.ru
Ресей, Moscow, 117997; Dolgoprudnyi, Moscow oblast, 141700
S. Popel
Space Research Institute; National Research University Higher School of Economics
Хат алмасуға жауапты Автор.
Email: popel@iki.rssi.ru
Ресей, Moscow, 117997; Moscow, 101000