“Three Sisters” Measured As a Triple Rogue Wave Group

A. Magnusson, K. Trulsen, O. Aarnes, E. Bitner-Gregersen, M. Malila
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引用次数: 4

Abstract

On November 30, 2018, our attention was caught when analyzing wave profile time series measured by a platform mounted wave sensor (a SAAB REX radar) at Ekofisk, central North Sea. The 20-minute time series had not only one, but three consecutive waves with individual heights that all were more than twice the significant wave height, the two last of them being almost equally high with a factor 2.35 to the significant wave height of 4m (from 4σ(η), over 20 minutes). Counting three rogue waves in one sequence seems to be very rare. In this study we analyze how the shape is evolving in space and time using linear and non-linear propagation methods developed by Mark Donelan [1,2] and Karsten Trulsen [3,4]. Weather conditions and characteristics of the sea state with the ‘Three Sisters’ (named the “Justine Three Sisters”) are presented. It is found that the Three Sisters occurred in a crossing sea condition, with wind sea and swell coming from directions 60 degrees apart, with about same frequency, but very different energy.
“三姐妹”被认为是一个三重流氓浪组
2018年11月30日,在北海中部Ekofisk,在分析安装在平台上的波浪传感器(SAAB REX雷达)测量的波浪剖面时间序列时,引起了我们的注意。在20分钟的时间序列中,不仅有一个波浪,而且有三个连续的波浪,每个波浪的高度都超过有效波高的两倍,最后两个波浪的高度几乎相等,有效波高为4米(从4σ(η)开始,超过20分钟)。在一个序列中计算三个异常波似乎非常罕见。在本研究中,我们使用Mark Donelan[1,2]和Karsten Trulsen[3,4]开发的线性和非线性传播方法来分析形状如何在空间和时间上演变。介绍了“三姐妹”(名为“贾斯汀三姐妹”)的天气情况和海况特点。发现三姐妹事件发生在一个跨海条件下,风、海和浪分别来自60度方向,频率大致相同,但能量却大不相同。
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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