Generation of internal solitary waves by frontally forced intrusions in geophysical flows - Archive ouverte HAL Access content directly
Journal Articles Nature Communications Year : 2016

Generation of internal solitary waves by frontally forced intrusions in geophysical flows

Abstract

Internal solitary waves are hump-shaped, large-amplitude waves that are physically analogous to surface waves except that they propagate within the fluid, along density steps that typically characterize the layered vertical structure of lakes, oceans and the atmosphere. As do surface waves, internal solitary waves may overturn and break, and the process is thought to provide a globally significant source of turbulent mixing and energy dissipation. Although commonly observed in geophysical fluids, the origins of internal solitary waves remain unclear. Here we report a rarely observed natural case of the birth of internal solitary waves from a frontally forced interfacial gravity current intruding into a two-layer and vertically sheared background environment. The results of the analysis carried out suggest that fronts may represent additional and unexpected sources of internal solitary waves in regions of lakes, oceans and atmospheres that are dynamically similar to the situation examined here in the Saguenay Fjord, Canada.
Fichier principal
Vignette du fichier
ncomms13606.pdf (2.4 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive
Loading...

Dates and versions

hal-01516107 , version 1 (03-12-2019)

Licence

Attribution

Identifiers

Cite

Daniel Bourgault, Peter S. Galbraith, Cédric Chavanne. Generation of internal solitary waves by frontally forced intrusions in geophysical flows. Nature Communications, 2016, 7, pp.13606. ⟨10.1038/ncomms13606⟩. ⟨hal-01516107⟩
82 View
42 Download

Altmetric

Share

Gmail Facebook X LinkedIn More