Explosive Growth of Asymmetric Disturbances in a Flow with Vertical Shear

М. V. Kalashnik; Калашник М. В.

doi:10.31857/S0002351523060068

Explosive Growth of Asymmetric Disturbances in a Flow with Vertical Shear

Авторлар: Kalashnik М.V.¹^,2^,3
Мекемелер:
1. Obukhov Institute of Atmospheric Physics, RAS
2. Schmidt Institute of Physics of the Earth, RAS
3. Research and Production Association Typhoon
Шығарылым: Том 59, № 6 (2023)
Беттер: 786-792
Бөлім: Articles
URL: https://ogarev-online.ru/0002-3515/article/view/162279
DOI: https://doi.org/10.31857/S0002351523060068
EDN: https://elibrary.ru/VQBXLY
ID: 162279

Дәйексөз келтіру

Толық мәтін

Ашық рұқсат
Рұқсат жабық

Рұқсат берілді
Рұқсат жабық

Тек жазылушылар үшін

Аннотация
Авторлар туралы
Әдебиет тізімі
Қосымша файлдар
Статистика

Аннотация

The classical problem of geophysical hydrodynamics is the problem of the instability of a zonal geostrophic flow with a vertical velocity shear. At present, the instability with respect to symmetric perturbations that do not depend on the coordinate along the flow has been most thoroughly studied. For a symmetric instability to arise, the two-dimensional perturbation wave vector must lie inside a certain sector in the vertical plane of the wave numbers. In this paper, we study the instability with respect to asymmetric perturbations oriented at an angle to the flow. Fundamentally new features of the temporal dynamics of the amplitudes of such perturbations are found. The main feature is associated with the existence of a stage of exponential explosive growth of finite duration. A kinematic interpretation of this stage is given, which is related to the passage of the vertical projection of the perturbation wave vector through the sector of symmetric instability.

Негізгі сөздер

baroclinic instability, vertical velocity shear, wave vector, turning points

Авторлар туралы

М. Kalashnik

Obukhov Institute of Atmospheric Physics, RAS; Schmidt Institute of Physics of the Earth, RAS; Research and Production Association Typhoon

Хат алмасуға жауапты Автор.
Email: kalashnik-obn@mail.ru
Russia, 109017, Moscow, Pyzhevsky per., 3; Russia, 123242, Moscow, Bolshaya Gruzinskaya, 10; Russia, 249038, Kaluga obl.,, Obninsk, ul. Pobedy, 4

Әдебиет тізімі

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