Encyclopedia of Maritime and Offshore Engineering

Talas, Risto; Menachof, David; Harris, Kelvin

doi:10.1002/9781118476406

Cited by 13 publications

(1 citation statement)

References 95 publications

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“…Only the decreasing wave load (at t ≤ T/4) is modeled ( Figure S3). Wave periods in our simulations range from T = 10.8 s, characteristic of short-period waves (e.g., wind-generated waves), to T=4 hr, characteristic of longer period waves (e.g., tides; e.g., Munk, 1950;Toffoli & Bitner-Gregersen, 2017). Wave amplitudes range from A=5 kPa to A=50 kPa.…”

Section: Methodsmentioning

confidence: 98%

Methane Bubble Escape From Gas Horizon in Muddy Aquatic Sediment Under Periodic Wave Loading

Katsman

2019

Geophysical Research Letters

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Ebullition of greenhouse methane (CH4) from the aquatic sediments is often observed at various hydrostatic pressure drops: at low tides, waves, and even at atmospheric pressure drops. It is especially pronounced at the different vent structures, for example, pockmarks, mud volcanoes, and cold seeps. The modeling conducted in the current study suggests that long timescale (glacial to centennial frequency) sea level drops may induce “stable” bubble ascent and control the position of the gas horizon in muddy aquatic sediment. Bubbles escape in the “dynamic” regime from the shallow gas horizon and subsequently to the water column is more feasible under shorter‐period waves of higher amplitude travelling in shallow water. These findings are illustrated by examples of various vent structures (e.g., pockmarks), pronounced in shallow straits and bays, described in the literature.

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Section: Methodsmentioning

confidence: 98%