Rogue events in spatiotemporal numerical simulations of unidirectional waves in basins of different depth

A. Slunyaev (), A. Sergeeva and I. Didenkulova
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A. Slunyaev: Institute of Applied Physics, Russian Academy of Sciences
A. Sergeeva: Institute of Applied Physics, Russian Academy of Sciences
I. Didenkulova: Institute of Applied Physics, Russian Academy of Sciences

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2016, vol. 84, issue 2, No 9, 549-565

Abstract: Abstract The evolution of unidirectional nonlinear sea surface waves is calculated numerically by means of solution of the Euler equations. The wave dynamics corresponds to quasi-equilibrium states characterized by JONSWAP spectra. The spatiotemporal data are collected and processed providing information about the wave height probability and typical appearance of abnormally high waves (rogue waves). The waves are considered at different water depths ranging from deep to relatively shallow cases (k p h > 0.8, where k p is the peak wavenumber, and h is the local depth). The asymmetry between front and rear rogue wave slopes is identified; it becomes apparent for sufficiently high waves in rough sea states at all considered depths k p h ≥ 1.2. The lifetimes of rogue events may reach up to 30–60 wave periods depending on the water depth. The maximum observed wave has a height of about three significant wave heights. A few randomly chosen in situ time series from the Baltic Sea are in agreement with the general picture of the numerical simulations.

Keywords: Rogue waves; Finite depth; Intermediate depth; Numerical simulations; Wave height statistics; Wave asymmetry (search for similar items in EconPapers)
Date: 2016
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DOI: 10.1007/s11069-016-2430-x

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