caa a22 4500 445302852 CHVBK 20180317142603.0 cr unu---uuuuu 170323e20101001xx s 000 0 eng 10.1134/S000143381005004X doi (NATIONALLICENCE)springer-10.1134/S000143381005004X Cyclostrophic adjustment and nonlinear oscillations in the core of an intense atmospheric vortex [Elektronische Daten] [M. Kalashnik, K. Visheratin] Intense atmospheric vortices are characterized by a regime of cyclostrophic balance, i.e., the balance between the pressure gradient and centrifugal force. To describe motions in the core of an axisymmetrical vortex, a class of exact solutions to the equations of gas dynamics with a linear dependence on radius is derived for the velocity components and with a quadratic dependence for temperature. It is shown that small deviations from the balance state give rise to oscillations of the hydrothermodynamic fields in the vortex core with a frequency proportional to the angular velocity of the rotation of the core. For fairly large initial deviations, oscillations are clearly anharmonic and, under the conditions of the prevailing centrifugal force, result in a significant temperature decrease on the vortex axis. The application of this class of solutions to describing the Ranque vortex effect (the intense cooling of gas during rapid rotations) and the acoustic radiation from tornadoes is discussed. Pleiades Publishing, Ltd., 2010 cyclostrophic balance nationallicence infrasonic oscillations nationallicence acoustics nationallicence Ranque effect nationallicence swirl nationallicence tornado nationallicence adjustment nationallicence Kalashnik M. Taifun Research and Production Association, ul. Pobedy 4, 249038, Obninsk, Kaluga oblast, Russia aut Visheratin K. Taifun Research and Production Association, ul. Pobedy 4, 249038, Obninsk, Kaluga oblast, Russia aut Izvestiya, Atmospheric and Oceanic Physics SP MAIK Nauka/Interperiodica 46/5(2010-10-01), 591-596 0001-4338 46:5<591 2010 46 11485 https://doi.org/10.1134/S000143381005004X text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S000143381005004X text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kalashnik M. Taifun Research and Production Association, ul. Pobedy 4, 249038, Obninsk, Kaluga oblast, Russia aut NATIONALLICENCE 700 1- Visheratin K. Taifun Research and Production Association, ul. Pobedy 4, 249038, Obninsk, Kaluga oblast, Russia aut NATIONALLICENCE 773 0- Izvestiya, Atmospheric and Oceanic Physics SP MAIK Nauka/Interperiodica 46/5(2010-10-01), 591-596 0001-4338 46:5<591 2010 46 11485 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer