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Generation of convective motion and dust vortices in unstably stratified atmosphereстатья Исследовательская статья Перевод
Информация о цитировании статьи получена из
Scopus
Дата последнего поиска статьи во внешних источниках: 3 ноября 2018 г.
- Авторы: Onishchenko O.G., Pokhotelov O.A., Astafieva N.M.
- Журнал: Current problems in remote sensing of the Earth from space
- Том: 14
- Номер: 2
- Год издания: 2017
- Первая страница: 230
- Последняя страница: 239
- DOI: 10.21046/2070-7401-2017-14-2-230-239
- Аннотация: Inflow of dust in the atmosphere is determined by the numerous phenomena among which the most strong are sandy (dust) storms of synoptic scale. According to modern representations dust vortices can serve as seeds of dust storms. Whirlwinds with the helix-like ascending flow can transfer dust to great altitudes. The dust which is picked up by wind is transferred to long distances, having significant impact on global and regional climate. Influence of dust and aerosols on climate change in past, present and future is one of poorly studied processes. Dust which is pushed up by seasonal dust storms of the Sahara can substantially block sunlight, cooling the ocean. Influence of dust can be even more essential, than El Nino''s influence, on generation of typhoons. Also process of generation of dust vortices is poorly analysed. In the present study in the framework of ideal hydrodynamics the new nonlinear model of generation of convective motions and dust vortices in unstably stratified atmosphere is developed. Using the nonlinear equations for internal gravity waves, the axially-symmetric model of generation of convective cells (plumes) is proposed. It is shown that in convectively unstable atmosphere possessing an external large-scale vorticity, from plumes small-scale intensive vertical whirlwinds are extremely rapidly generated. The structure of radial, vertical and toroidal velocity components in such whirlwinds is studied. It is found that the lowered pressure in whirlwinds with strong toroidal motion is responsible for "suction" of dust from the Earth''s surface to the internal area of a whirlwind. The structure of a vertical vorticity and toroidal speed in internal and external regions of a whirlwind is analysed.
- Добавил в систему: Похотелов Олег Александрович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Краткий текст | Generation_Convective_2017.docx | 13,7 КБ | 15 января 2019 [PokhotelovOA] | |
| 2. | Краткий текст | Zaklyuchenie_Generation_2017.docx | 11,9 КБ | 15 января 2019 [PokhotelovOA] |