CALCULATION OF THE AMPLITUDE AND POWER SPECTRUM OF INTERNAL WAVE IN THE SOUTH-EAST SEA REGION OF VIETNAM

Authors

  • Nguyen Ba Xuan Journal of marine science and technology Vietnam Academy of Science and Technology
  • Tran Van Chung

DOI:

https://doi.org/10.15625/1859-3097/7/2/6332

Abstract

In this paper some indirect calculations of the amplitude and power spectrum of internal wave are presented  on basis of using the continuous temperature data measured at 2 moorings stations in the South-East sea  region of Vietnam. The calculated results show that: In the shallow continental shelf region during the  South-West monsoon, at the depths of 12 - 38 m, the average amplitude of internal wave has the values of 5 -  10 m; Whereas in the more deeper region during North-East monsoon, at the depths of 10 - 60 m, 70 - 220 m and 230 - 600 m, the average amplitude of internal wave has the values of 20 - 80 m,  1 - 5 m and  8 - 15 m  respectively; By using the power spectrum analysis of internal wave show that: The power spectrum of internal wave in the shallow continental region is less than of about 20 times in comparison with the deeper  region; The power spectrum of internal wave in the South-East sea region of Vietnam is complicated and  formed mainly by waves having periods of 3 - 24 hours, among them, the wave components with periods of  12 and 24 hours are dominance. The waves with period smaller than 3 hours are very small power.

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Published

2007-06-29

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Section

Articles