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Journal of Tropical Oceanography >

2016 , Vol. 35 >Issue 1: 82 - 95

DOI: https://doi.org/10.11978/2014019

Marine Hydrography

Numerical experiments on wavenumber directional discretization in the MASNUM Wave Model

  • TENG Yong ,
  • HAN Lei ,
  • YANG Yongzeng ,
  • QIAO Fangli ,
  • SUN Baonan ,
  • LU Jing
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  • 1. First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;
    2. Key Lab of Marine Science and Numerical Modeling, State Oceanic Administration, Qingdao 266061, China;

Received date: 2014-03-06

  Online published: 2016-02-02

Supported by

The National Natural Science Foundation of China (40906017)

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Abstract

This study shows some numerical experiments based on the 3rd generation wave model of MASNUM, in four cases of different wavenumber directional discretization numbers: 12, 24, 36, and 48, respectively in the Pacific Ocean in 2005, and compares the model results with 17 buoy observations. These results indicate that the discretization number of 36 is the best choice for the model setting in the mid-latitude area and the eastern Pacific, while the discretization number of 24 is the best choice in the low latitude region. Comparison shows that the best discretization number is 24 in winter while 36 in summer. We also find that when significant wave height is between 2.0 and 4.0 m, the best discretization number is 24. When significant wave height is lower than 2.0 m, 24 and 36 are both proper choices. We recommend choosing 36 when under poor ocean conditions. All above results show obvious improvements comparing with the case of discretization number 12. Therefore, we believe that the discretization number of the MASNUM wave model should be greater than 12, and that the number of 24 or 36 is a better choice.

Key words： MASNUM; wave; wave model; discretization

Cite this article

TENG Yong , HAN Lei , YANG Yongzeng , QIAO Fangli , SUN Baonan , LU Jing . Numerical experiments on wavenumber directional discretization in the MASNUM Wave Model[J]. Journal of Tropical Oceanography, 2016 , 35(1) : 82 -95 . DOI: 10.11978/2014019

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