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Wave climate simulation for southern region of the South China Sea

机译：南海南部地区的海浪气候模拟

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摘要

This study investigates long-term variability and wave characteristic trends in the southern region of the South China Sea (SCS). We implemented the state-of-the art WAVEWATCH III spectral wave model to simulate a 31-year wave hindcast. The simulation results were used to assess the inter-annual variability and long-term changes in the SCS wave climate for the period 1979 to 2009. The model was forced with Climate Forecast System Reanalysis winds and validated against altimeter data and limited available measurements from an Acoustic Wave and Current recorder located offshore of Terengganu, Malaysia. The mean annual significant wave height and peak wave period indicate the occurrence of higher wave heights and wave periods in the central SCS and lower in the Sunda shelf region. Consistent with wind patterns, the wave direction also shows southeasterly (northwesterly) waves during the summer (winter) monsoon. This detailed hindcast demonstrates strong inter-annual variability of wave heights, especially during the winter months in the SCS. Significant wave height correlated negatively with Niño3.4 index during winter, spring and autumn seasons but became positive in the summer monsoon. Such correlations correspond well with surface wind anomalies over the SCS during El Nino events. During El Niño Modoki, the summer time positive correlation extends northeastwards to cover the entire domain. Although significant positive trends were found at 95 % confidence levels during May, July and September, there is significant negative trend in December covering the Sunda shelf region. However, the trend appears to be largely influenced by large El Niño signals.
机译：本研究调查了南中国海南部地区的长期变化和波浪特征趋势。我们实施了最先进的WAVEWATCH III频谱波模型，以模拟31年后兆波。该模拟结果用于评估1979年至2009年期间SCS波浪气候的年际变化和长期变化。该模型在气候预测系统重新分析风的作用下进行了验证，并根据高度计数据和有限的可用测量值进行了验证。声波和电流记录仪位于马来西亚登嘉楼的海上。年平均重要波高和波峰周期表明，在南海中部出现较高的波高和波周期，而在da他陆架地区则较低。与风型一致，在夏季（冬季）季风期间，波向也显示东南（西北）波。此详细的后预报表明，波高的年际变化很大，尤其是在南海的冬季。在冬季，春季和秋季，显着的波高与Niño3.4指数呈负相关，而在夏季风中则变为正值。这种相关性与El Nino事件期间SCS上的地面风异常非常吻合。在厄尔尼诺·莫多基（ElNiñoModoki）期间，夏季正相关关系向东北延伸，覆盖了整个区域。尽管在5月，7月和9月的95％置信水平上发现了显着的积极趋势，但12月涵盖了da他陆架地区的显着负趋势。但是，这种趋势似乎在很大程度上受到大的厄尔尼诺信号的影响。

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  • 来源
    《Ocean Dynamics》 |2013年第8期|961-977|共17页
  • 作者

    Ali Mirzaei; Fredolin Tangang; Liew Juneng; Muzneena Ahmad Mustapha; Mohd Lokman Husain; Mohd Fadzil Akhir;

  • 作者单位

    Research Centre for Tropical Climate Change System (IKLIM) Faculty of Science and Technology Universiti Kebangsaan Malaysia">(1);

    Research Centre for Tropical Climate Change System (IKLIM) Faculty of Science and Technology Universiti Kebangsaan Malaysia">(1);

    Research Centre for Tropical Climate Change System (IKLIM) Faculty of Science and Technology Universiti Kebangsaan Malaysia">(1);

    Research Centre for Tropical Climate Change System (IKLIM) Faculty of Science and Technology Universiti Kebangsaan Malaysia">(1);

    Institute of Oceanography and Environment Universiti Malaysia Terengganu">(2);

    Institute of Oceanography and Environment Universiti Malaysia Terengganu">(2);

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    South China Sea; WAVEWATCH III™; Significant wave height; Niño3.4; El Niño Modoki;

    机译：南中国海;WAVEWATCH III™;显着的波高;Niño3.4;厄尔尼诺·莫多基（ElNiñoModoki）;

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