Observations of long-period waves in the nearshore waters of central west coast of India during the fall inter-monsoon period
Observations of long-period waves in the nearshore waters of central west coast of India during the fall inter-monsoon period
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DOI：
10.1016/j.oceaneng.2017.01.014
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发表时间：
2017-02
影响因子：
5
通讯作者：
M. Amrutha;V. S. Kumar;Jesbin George
中科院分区：
文献类型：
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作者：
M. Amrutha;V. S. Kumar;Jesbin George
2010-2015年期间，在4个地点检查了秋季季风期间（10月）在阿拉伯海东部测量的波浪。多模态的功能已被观察到在测量的海浪谱由于独立的波系统对应的长周期涌浪所产生的远程风暴，涌浪所产生的附近的风暴和本地产生的风浪。10月份，不同年份出现了5-7次长周期波（峰值波周期>18 s），有效波高均小于1.4m。数值波浪模型的波峰周期的空间分布表明沿着阿拉伯海东部350公里长周期涌浪的存在几乎是在同一天。结果表明，南印度洋40-60°S、20-40°E海域产生的高波（有效波高>4 m）在5-6天内到达测点，形成长周期波。与其他年份相比，2011年和2015年观察到的长周期波浪百分比相对较高，这是由于印度洋偶极子的影响导致研究地点的短周期波浪减少。
The waves measured in the eastern Arabian Sea during the fall inter-monsoon period (October) are examined at 4 locations during 2010–2015. Multi-modal features have been observed in measured wave spectra due to independent wave systems corresponding to long-period swells generated by remote storms, swells generated by nearby storms and locally generated wind waves. In October, the long-period waves (peak wave period>18 s) appeared 5–7 times in different years and the significant wave height of these long-period waves are less than 1.4 m. The spatial distribution of peak wave period based on the numerical wave model shows that the presence of long-period swells along the 350 km stretch of the eastern Arabian Sea is almost in the same day. It is observed that the high waves (significant wave height >4 m) generated in an area bounded by 40–60°S and 20–40°E in the south Indian Ocean reached the measurement locations in 5–6 days and resulted in the long-period waves. Relatively high percentage of long-period waves are observed in 2011 and 2015 compared to other years due to the reduction in short-period waves at the study location due to the influence of Indian Ocean Dipole.