Theoretical study of the effect of topographic height and width on generation of internal tides

Anzhou Cao; Xianqing Lü; Chunbao Miao

doi:10.1007/s00343-015-4046-5

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Theoretical study of the effect of topographic height and width on generation of internal tides

Updated：2023-05-16

- Theoretical study of the effect of topographic height and width on generation of internal tides
- Journal of Oceanology and Limnology Vol. 32, Issue 6, Pages: 1421-1434(2014)
- Affiliations：
  
  Laboratory of Physical Oceanography Ocean University of China
- Author bio：
- Funds：
- DOI：10.1007/s00343-015-4046-5
  CLC：
- Online First：07 August 2014，
  
  Published：2014
- Accepted：
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Cao, A., Lü, X. & Miao, C. Theoretical study of the effect of topographic height and width on generation of internal tides., Chin. J. Ocean. Limnol. 32, 1421–1434 (2014). https://doi.org/10.1007/s00343-015-4046-5
DOI：

Cao, A., Lü, X. & Miao, C. Theoretical study of the effect of topographic height and width on generation of internal tides., Chin. J. Ocean. Limnol. 32, 1421–1434 (2014). https://doi.org/10.1007/s00343-015-4046-5 DOI：

摘要

Abstract

Internal tides generated upon two-dimensional Gaussian topographies of different sizes and steepness are investigated theoretically in a numerical methodology. Compared with previous theoretical works

this model is not restricted by weak topography

but provides an opportunity to examine the influence of topography. Ten typical cases are studied using different values of height and/or width of topography. By analyzing the baroclinic velocity fields

as well as their first eight baroclinic modes

it is found that the magnitude of baroclinic velocity increases and the vertical structure becomes increasingly complex as height increases or width decreases. However

when both height and width vary

while parameter s (the ratio of the topographic slope to the characteristic slope of the internal wave ray) remains invariant

the final pattern is influenced primarily by width. The conversion rate is studied and the results indicate that width determines where the conversion rate reaches a peak

and where it is positive or negative

whereas height affects only the magnitude. High and narrow topography is considerably more beneficial to converting energy from barotropic to baroclinic fields than low and wide topography. Furthermore

parameter s

which is an important non-dimensional parameter for internal tide generation

is not the sole parameter by which the baroclinic velocity fields and conversion rate are determined.

关键词

Keywords

references

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