A New Class of Edge Baroclinic Waves and the Mechanism of Their Generation
- Autores: Kalashnik M.1,2, Chkhetiani O.1,3, Chagelishvili G.4,5
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Afiliações:
- Obukhov Institute of Atmospheric Physics
- Research and Production Association Typhoon
- Space Research Institute
- Institute of Geophysics
- Abastumani Astrophysical Observatory
- Edição: Volume 54, Nº 4 (2018)
- Páginas: 305-312
- Seção: Article
- URL: https://journals.rcsi.science/0001-4338/article/view/148558
- DOI: https://doi.org/10.1134/S0001433818040230
- ID: 148558
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Resumo
Edge baroclinic waves are generated in a geostrophic flow with a vertical shear near a solid surface. The study investigates a new class of baroclinic waves in flows with horizontal and vertical shears and a linear distribution of potential vorticity. It is shown that taking account of the horizontal shear leads to the appearance of new features of wave dynamics. These include the nonmodal growth of energy in the initial stage of development, the time dependence of the vertical wave scale, and the possibility of generation of stationary or blocked waves. The horizontal shear makes the mechanism of generation of baroclinic waves by initial vortex perturbations more efficient. One important feature is associated with vortex paths, which are formed by the superposition of a baroclinic wave on the flow with horizontal shear.
Sobre autores
M. Kalashnik
Obukhov Institute of Atmospheric Physics; Research and Production Association Typhoon
Autor responsável pela correspondência
Email: kalashnik-obn@mail.ru
Rússia, Moscow, 109017; Obninsk, Kaluga oblast, 249038
O. Chkhetiani
Obukhov Institute of Atmospheric Physics; Space Research Institute
Email: kalashnik-obn@mail.ru
Rússia, Moscow, 109017; Moscow, 117997
G. Chagelishvili
Institute of Geophysics; Abastumani Astrophysical Observatory
Email: kalashnik-obn@mail.ru
Geórgia, Tbilisi, 0193; Tbilisi, 1062