hydrophysicsФундаментальная и прикладная гидрофизикаFundamental and Applied Hydrophysics2073-66732782-5221St. Petersburg Research Center of the Russian Academy of Sciences10.7868/S2073667320040024hydrophysics-710Research ArticleФУНДАМЕНТАЛЬНЫЕ ВОПРОСЫ ГИДРОФИЗИКИFUNDAMENTAL ISSUES OF HYDROPHYSICSМоделирование длинноволновой динамики на материковом склоне океана и регионах свала глубинModelling Long-Wave Dynamics on the Continental Slope of the Ocean and Areas of Sharp Depth VariationВольцингерН. Е.VoltzingerN. E.

117997, Нахимовский пр., д. 36, г. Москва

117997, Nahimovsky Pr., 36, Moscow

lenna30@mail.ruАндросовА. А.AndrosovA. A.

117997, Нахимовский пр., д. 36, г. Москва, Россия

27570, Ам Ханделсшафен, 12, г. Бремерхафен, Германия

117997, Nahimovsky Pr., 36, Moscow, Russia

Am Handelshafen 12, 27570 Bremerhaven, Germany

Институт океанологии им. П.П. Ширшова РАНРоссияShirshov Institute of Oceanology RASRussian FederationИнститут океанологии им. П.П. Ширшова РАН; Институт полярных и морских исследований им. Альфреда ВегенераРоссияShirshov Institute of Oceanology RAS; Alfred Wegener Institute Helmholtz Center for Polar and Marine ResearchRussian Federation2020180820221341626Copyright © Вольцингер Н.Е., Андросов А.А., 20212021Вольцингер Н.Е., Андросов А.А.Voltzinger N.E., Androsov A.A.This work is licensed under a Creative Commons Attribution 4.0 License.https://hydrophysics.spbrc.ru/jour/article/view/710

На идеализированном 2D-разрезе материкового склона моделируется гравитационный сток более плотных водных масс, поступающих с континентального шельфа. На решениях двух задач в гидростатическом приближении и в полной негидростатической постановке сравниваются динамические характеристики процесса: поля скорости, давления, движение и структура уплотненной головной линзы. Такое же сравнение проводится на решении модельной задачи гравитационного приспособления к равновесию — имманентной черте динамики на материковом склоне. По результатам 3D-моделирования динамики и гидрологии пролива Ломбок (Индонезийский архипелаг) сравниваются поля гидростатической и негидростатической вертикальной скорости на свале глубин пролива. Приводятся результаты расчета хода вертикальной скорости и ее спектров в приливном цикле волны М2. Сравнение показывает непригодность моделирования склоновой динамики в гидростатическом приближении.

On an idealized 2D-cross-section of the continental slope, the situation in the polar regions is simulated — dense water falls to the seafloor from the continental shelf. On the solutions of two problems in the hydrostatic approximation and in the complete nonhydrostatic formulation, the dynamic characteristics of the process are compared: the fields of velocity, pressure, motion and the structure of the dense lens of water. The same comparison is carried out on the solution of the model problem of gravitational adaptation to equilibrium — an immanent line of dynamics on the continental slope. Based on the results of 3D-modelling of the dynamics and hydrology of the Lombok Strait (Indonesian Archipelago), the fields of hydrostatic and nonhydrostatic vertical velocity are compared at the slope of the strait. The simulation result of the vertical velocity and its spectra in the tidal cycle of the M2 wave are presented. The comparison shows the inadequacy of modelling slope dynamics in the hydrostatic approximation.

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The authors declare that there are no conflicts of interest present.