Relationship between Sea Surface Single Carrier Waves and Decreasing Pressures of Atmosphere Lower Boundary

• 作者: Daika Augustin Mbane Biouele César
• 来源期刊: 海洋科学期刊(英文)
• 学科: 医学
• 关键词: NONLINEAR Theory of Off-Balance SYSTEMS BIRTHS of Single Carrier WAVES Associated with Atmosphere’s Low Pressure SYSTEMS NLSE (Nonlinear Schrodinger Equation)
• 年，卷（期）: 2015,（1）
• 页码范围: 45-54
• 页数: 10页
• 分类号: R73

摘要

Descriptions of unusually high waves appearing on the sea surface for a short time (freak, rogue or killer waves) have been considered as a part of marine folklore for a long time. A number of instrumental registrations have appeared recently making the community to pay more attention to this problem and to reconsider known observations of freak waves. To allow a better understanding of the behavior of rogue waves associated with tornadoes in terms of their origin, the nonlinear theory of off-balance systems is developed in the specific case of strong agitations constantly seen on the surface of extensive and deep rivers, when they are crossed by an atmosphere’s low pressure system (tornadoes, cyclones, hurricanes, etc.). A mathematical model based on the Navier-Stokes and Euler Lagrange equations coupled with assumptions derived from instrumental registrations on the training locations (or birth places) of freak waves is developed to enhance the physics of processes responsible for the formation (or origin) of the waves associated with atmosphere’s low pressure systems. Freak waves births’ constraints are mainly the need for both consistent water (i.e., extensive-deep rivers) and potential velocity flow availabilities. Numerical simulations, based on the use of the NLSE (Nonlinear Schrodinger Equation) are performed to validate our mathematical model on the births of single carrier waves associated with atmosphere’s low pressure systems.