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Spatial structure of internal tidal waves generated on weak topographies
Fan P(范平); Singh VP; Fan P
Source PublicationDynamics of Atmospheres and Oceans
2010
Volume49Issue:2-3Pages:188-205
ISSN0377-0265
AbstractThe generation of internal gravity waves by barotropic tidal flow passing over a two-dimensional topography is investigated. Rather than calculating the conversion of tidal energy, this study focuses on delineating the geometric characteristics of the spatial structure of the resulting internal wave fields (i.e., the configurations of the internal beams and their horizontal projections) which have usually been ignored. it is found that the various possible wave types can be demarcated by three characteristic frequencies: the tidal frequency, wo; the buoyancy frequency, N; and the vertical component of the Coriolis vector or earth's rotation.f. When different possibilities arising from the sequence of these frequencies are considered, there occur 12 kinds of wave structures in the full 3D space in contrast to the 5 kinds identified by the 2D theory. The constant wave phase lines may form as ellipses or hyperbolic lines on the horizontal plane, provided the buoyancy frequency is greater or less than the tidal frequency. The effect that stems from the consideration of the basic flow is also found, which not only serves as the reason for the occurrence of higtter harmonics but also increases the wave strength in the direction of basic flow. (C) 2009 Elsevier B.V. All rights reserved.
Subject Area环境流体力学
DOI10.1016/j.dynatmoce.2009.06.002
URL查看原文
Indexed BySCI
Language英语
WOS IDWOS:000275233000007
WOS KeywordDEEP-OCEAN ; LEE WAVES ; CONVERSION ; TIDES ; MECHANISM ; FLUIDS ; FLOW
WOS Research AreaGeochemistry & Geophysics ; Meteorology & Atmospheric Sciences ; Oceanography
WOS SubjectGeochemistry & Geophysics ; Meteorology & Atmospheric Sciences ; Oceanography
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/43585
Collection环境力学重点实验室(2009-2011)
Corresponding AuthorFan P
Recommended Citation
GB/T 7714
Fan P,Singh VP,Fan P. Spatial structure of internal tidal waves generated on weak topographies[J]. Dynamics of Atmospheres and Oceans,2010,49(2-3):188-205.
APA 范平,Singh VP,&Fan P.(2010).Spatial structure of internal tidal waves generated on weak topographies.Dynamics of Atmospheres and Oceans,49(2-3),188-205.
MLA 范平,et al."Spatial structure of internal tidal waves generated on weak topographies".Dynamics of Atmospheres and Oceans 49.2-3(2010):188-205.
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