Wave Regime of Vietnamese Waters on the Basis of Numerical Modeling and Field Measurements

IF 0.7 Q4 GEOSCIENCES, MULTIDISCIPLINARY Russian Journal of Earth Sciences Pub Date : 2022-12-31 DOI:10.2205/2022es000816
M. Le, G. Vlasova, S. Lebedev, Tuan Nguyen, The Ho, Binh Tran, D. Nguyen
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Abstract

This paper presents results of research of the wave regime in Vietnamese waters (South China Sea) based on the data of numerical modeling data using the WAM model (WAVE Modeling). The model domain covers the basin of the South China Sea (SCS). The bathymetry of the SCS used in the model is based on the ETOPO5 digital database. Wind parameters are based on the six-hour NCEP/NCAR reanalysis data with a resolution of ΔX = ΔY = 0.25° over the period 1979–2021. The field wave data measurements were collected by the Institute of Oceanography of Vietnam Academy of Science and Technology in the southern central Vietnamese waters in 2013. The statistical data of computed wave characteristics for the period of 43 years (1979–2021) illustrate that the main wave direction in Vietnamese waters was NE during the Northeastern (NE) monsoon, and in the opposite direction during the Southwestern (SW) monsoon. The NE monsoon wave was more dominant than that of the SW monsoon wave. Recurrence frequency (%) of significant wave height Hs >1.0 m (Hs – significant wave height is an average of 1/3 the largest of serial waves relative to average seawater level) greater than 50% covered the northeastern, central region of the SCS, and central Vietnamese coast. The wave recurrence frequency in the Gulf of Tonkin and Gulf of Thailand was <40% and <30%, respectively. The central Vietnamese coast from Ly Son Island to Phu Quy Island was the strongest affected by wave action. The recurrence frequency of the maximum significant wave height Hs >3.5 m was greater than 1.5%. The Gulf of Tonkin (Bach Long Vi Island) and the Gulf of Thailand (Tho Chu Island) were less affected by wave action than the central Vietnamese coast: the recurrence frequency of the maximum wave height (Hs>3.5 m) was less than 0.1%. Phu Quy and Con Dao Islands were more influenced by wave action during both seasons than the central coast of Vietnam.
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基于数值模拟和实地测量的越南水域波浪状态
本文介绍了基于WAM模式(wave modeling)数值模拟资料的南海越南海域波浪状态研究结果。模式域覆盖南海海盆。模型中使用的南海水深测量基于ETOPO5数字数据库。风参数基于1979-2021年期间6小时NCEP/NCAR再分析数据,分辨率为ΔX = ΔY = 0.25°。现场波浪数据测量由越南科学技术研究院海洋研究所于2013年在越南中南部水域收集。1979-2021年43年的计算波特征统计资料表明,在东北季风期间,越南海域的主要波浪方向为NE,而在西南季风期间,越南海域的主要波浪方向为相反方向。东北季风波比西南季风波更占优势。显著波高Hs >1.0 m (Hs -显著波高平均为序列波中最大的1/3)的复发率(%)大于50%,分布在南海东北部、中部地区和越南中部沿海。东京湾和泰国湾的波浪重现频率为3.5 m,大于1.5%。北部湾(Bach Long Vi Island)和泰国湾(Tho Chu Island)受波浪作用的影响小于越南中部海岸,最大波高(Hs>3.5 m)的重复频率小于0.1%。Phu Quy和Con Dao群岛在这两个季节受波浪作用的影响比越南中部海岸更大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Russian Journal of Earth Sciences
Russian Journal of Earth Sciences GEOSCIENCES, MULTIDISCIPLINARY-
CiteScore
1.90
自引率
15.40%
发文量
41
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