Numerical simulation and preliminary analysis on ocean waves during Typhoon Nesat in South China Sea and adjacent areas

Jichao Wang; Jie Zhang; Jungang Yang

doi:10.1007/s00343-014-3042-5

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Numerical simulation and preliminary analysis on ocean waves during Typhoon Nesat in South China Sea and adjacent areas

Updated：2023-05-16

- Numerical simulation and preliminary analysis on ocean waves during Typhoon Nesat in South China Sea and adjacent areas
- Journal of Oceanology and Limnology Vol. 32, Issue 3, Pages: 665-680(2014)
- Affiliations：
  
  1. Institute of Oceanology Chinese Academy of Sciences
  2. University of Chinese Academy of Sciences
  3. College of Science China University of Petroleum
  4. First Institute of Oceanography State Oceanic Administration
- Author bio：
- Funds：
- DOI：10.1007/s00343-014-3042-5
  CLC：
- Online First：04 May 2014，
  
  Published：2014
- Accepted：
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Wang, J., Zhang, J. & Yang, J. Numerical simulation and preliminary analysis on ocean waves during Typhoon Nesat in South China Sea and adjacent areas., Chin. J. Ocean. Limnol. 32, 665–680 (2014). https://doi.org/10.1007/s00343-014-3042-5
DOI：

Wang, J., Zhang, J. & Yang, J. Numerical simulation and preliminary analysis on ocean waves during Typhoon Nesat in South China Sea and adjacent areas., Chin. J. Ocean. Limnol. 32, 665–680 (2014). https://doi.org/10.1007/s00343-014-3042-5 DOI：

摘要

Abstract

Using the wave model WAVEWATCH III (WW3)

we simulated the generation and propagation of typhoon waves in the South China Sea and adjacent areas during the passage of typhoon Nesat (2011). In the domain 100°–145°E and 0°–35°N

the model was forced by the cross-calibrated multi-platform (CCMP) wind fields of September 15 to October 5

2011. We then validated the simulation results against wave radar data observed from an oil platform and altimeter data from the Jason-2 satellite. The simulated waves were characterized by five points along track using the Spectrum Integration Method (SIM) and the Spectrum Partitioning Method (SPM)

by which wind sea and swell components of the 1D and 2D wave spectra are separated. There was reasonable agreement between the model results and observations

although the WW3 wave model may underestimate swell wave height. Significant wave heights are large along the typhoon track and are noticeably greater on the right of the track than on the left. Swells from the east are largely unable to enter the South China Sea because of the obstruction due to the Philippine Islands. During the initial stage and later period of the typhoon

swells at the five points were generated by the propagation of waves that were created by typhoons Haitang and Nalgae. Of the two methods

the 2D SPM method is more accurate than the 1D SIM which overestimates the separation frequency under low winds

but the SIM method is more convenient because it does not require wind speed and wave direction. When the typhoon left the area

the wind sea fractions decreased rapidly. Under similar wind conditions

the points located in the South China Sea are affected less than those points situated in the open sea because of the influence of the complex internal topography of the South China Sea. The results reveal the characteristic wind sea and swell features of the South China Sea and adjacent areas in response to typhoon Nesat

and provide a reference for swell forecasting and offshore structural designs.

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Keywords

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