Rogue wave

About: Rogue wave is a research topic. Over the lifetime, 2977 publications have been published within this topic receiving 70933 citations. The topic is also known as: freak wave & monster wave.

On Oceanic Rogue Waves

Abstract: We propose a new conceptual framework for the prediction of rogue waves and third-order space-time extremes of wind seas that relies on the Tayfun (1980) and Janssen (2009) models coupled with Adler-Taylor (2009) theory on the Euler characteristics of random fields. Extreme statistics of the Andrea rogue wave event are examined capitalizing on European Reanalysis (ERA)-interim data. A refinement of Janssen's (2003) theory suggests that in realistic oceanic seas characterized by short-crested multidirectional waves, homogeneous and Gaussian initial conditions become irrelevant as the wave field adjusts to a non-Gaussian state dominated by bound nonlinearities over time scales $t\gg t_{c}\approx0.13T_{0}/ u\sigma_{\theta}$, where $T_{0}$, $ u$ and $\sigma_{\theta}$ denote mean wave period, spectral bandwidth and angular spreading of dominant waves. For the Andrea storm, ERA-interim predictions yield $t_{c}/T_{0}\sim O(1)$ indicating that quasi-resonant interactions are negligible. Further, the mean maximum sea surface height expected over the Ekofisk platform's area is higher than that expected at a fixed point. However, both of these statistics underestimate the actual crest height $h_{obs}\sim1.63H_s$ observed at a point near the Ekofisk site, where $H_s$ is the significant wave height. To explain the nature of such extreme, we account for both skewness and kurtosis effects and consider the threshold $h_{q}$ exceeded with probability $q$ by the maximum surface height of a sea state over an area in time. We find that $h_{obs}$ nearly coincides with the threshold $h_{1/1000}\sim1.62H_s$ estimated at a point for a typical $3$-hour sea state, suggesting that the Andrea rogue wave is likely to be a rare occurrence in quasi-Gaussian seas.

The wave climate of the Northeast Atlantic over the period 1955-1994 : The WASA wave hindcast

Abstract: The European project Waves and Storms in the North Atlantic (WASA) has been set up to prove, or to disprove, hypotheses of a worsening storm and wave climate in the Northeast Atlantic and adjacent seas in the present century A major obstacle for assessing changes in storm and wave conditions are inhomogeneities in the observational records, both in the local observations and in the analysed products, which usually produce an artificial increase of extreme winds and waves Therefore, changes in the wave climate were assessed with a state-of-the-art wave model using wind analyses Within the scope of the WASA project, a 40 year reconstruction (1955-1994) of the wave climate in the North Atlantic was completed using the WAM wave model The input wind fields were assumed to be reasonably homogeneous with time in the area south of 70°N and east of 20°W, and it was expected that the hindcast wave data would reliably describe the space-time evolution of wave conditions in this area The results of the hindcast experiment are presented in this article The main conclusion was that the wave climate in most of the Northeast Atlantic and in the North Sea has undergone significant variations on time scales of decades Part of variability was found to be related to the North Atlantic Oscillation As a general result we noted an increase of the maximum annual significant wave height over the last 40 years of about 5 to 10 cm/year for large parts of the Northeast Atlantic, north of the North Sea There was also a slight increase of probabilities of high waves derived from conventional extreme value statistics in northwest approaches to the North Sea Similar trends of the extreme waves were found in a scenario of future wave climate at a time of doubled CO 2 concentration in the atmosphere

Baseband Modulation Instability as the Origin of Rogue Waves

Abstract: Extreme wave events, also referred to as rogue waves, are mostly known as oceanic phenomena responsible for a large number of maritime disasters. These waves have height and steepness much greater than expected from the sea average state [1]: not only appear in oceans, but also in the atmosphere, in optics, in plasmas, in superfluids, in Bose-Einstein condensates and as capillary waves. The common features and differences among freak wave manifestations in their different contexts is a subject of intense discussion [2].