This article is about the natural phenomenon. For other uses, see Rogue wave (disambiguation).
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Rogue waves (also known as freak waves, monster waves, episodic waves, killer waves, extreme waves, and abnormal waves) are unusually large, unpredictable, and suddenly appearing surface waves that can be extremely dangerous to ships and isolated structures such as lighthouses.[1] They are distinct from tsunamis, which are often almost unnoticeable in deep waters and are caused by the displacement of water due to other phenomena (such as earthquakes). A rogue wave at the shore is sometimes called a sneaker wave.[2]
In oceanography, rogue waves are more precisely defined as waves whose height is more than twice the significant wave height (Hs or SWH), itself defined as the mean of the largest third of waves in a wave record. Rogue waves seem not to have a single distinct cause but occur where physical factors such as high winds and strong currents cause waves to merge to create a single exceptionally large wave.[1] A study based on AI prediction methods suggested a different possible cause, the authors identifying “linear superposition” as the main contributing factor.[3]
Among other causes, studies of nonlinear waves such as the Peregrine soliton, and waves modeled by the nonlinear Schrödinger equation (NLS), suggest that modulational instability can create an unusual sea state where a "normal" wave begins to draw energy from other nearby waves, and briefly becomes very large. Such phenomena are not limited to water and are also studied in liquid helium, nonlinear optics, and microwave cavities. A 2012 study reported that in addition to the Peregrine soliton reaching up to about three times the height of the surrounding sea, a hierarchy of higher order wave solutions could also exist having progressively larger sizes and demonstrated the creation of a "super rogue wave" (a breather around five times higher than surrounding waves) in a water-wave tank.[4]
A 2012 study supported the existence of oceanic rogue holes, the inverse of rogue waves, where the depth of the hole can reach more than twice the significant wave height. Rogue holes have been replicated in experiments using water-wave tanks but have not been confirmed in the real world.[5]
^ ab"Rogue Waves – Monsters of the deep: Huge, freak waves may not be as rare as once thought". The Economist. September 17, 2009. Retrieved 2009-10-04.
^"What Is a Sneaker Wave?". WorldAtlas. 3 April 2019. Retrieved 2020-07-29.
^Network, MI News (2023-11-24). "Researchers Debunk Myth Of Rogue Waves Using Artificial Intelligence". Marine Insight. Retrieved 2023-11-27.
^Chabchoub, A.; Hoffmann, N.; Onorato, M.; Akhmediev, N. (Jan-Mar 2012). "Super Rogue Waves: Observation of a Higher-Order Breather in Water Waves". Vol.2, No. 1. Physical Review. Retrieved 23 June 2023.
^Cite error: The named reference MyUser_Onlinelibrary.wiley.com_April_16_2016c was invoked but never defined (see the help page).
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