Modelling Long-Wave Dynamics on the Continental Slope of the Ocean and Areas of Sharp Depth Variation
https://doi.org/10.7868/S2073667320040024
Abstract
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.
About the Authors
N. E. Voltzinger
Shirshov Institute of Oceanology RAS
Russian Federation
Russian Federation
117997, Nahimovsky Pr., 36, Moscow
A. A. Androsov
Shirshov Institute of Oceanology RAS; Alfred Wegener Institute Helmholtz Center for Polar and Marine Research
Russian Federation
Russian Federation
117997, Nahimovsky Pr., 36, Moscow, Russia
Am Handelshafen 12, 27570 Bremerhaven, Germany
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Review
For citations:
Voltzinger N.E., Androsov A.A. Modelling Long-Wave Dynamics on the Continental Slope of the Ocean and Areas of Sharp Depth Variation. Fundamental and Applied Hydrophysics. 2020;13(4):16-26. (In Russ.) https://doi.org/10.7868/S2073667320040024
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