Internal gravity waves

Maarten C. Buijsman, Brian K. Arbic, Samuel M. Kelly, Amy F. Waterhouse

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The ocean’s interior is filled with waves that can only exist because the ocean is vertically stratified in temperature and salinity. Like waves at the ocean surface, internal waves are restored by gravity. These internal gravity waves are generated by wind, tides, and low-frequency flows. As internal waves propagate through the ocean, they interact with low-frequency background flows, topography, and other waves, facilitating an energy cascade to smaller scales, and eventually turbulence. The turbulent mixing is relevant for the general ocean circulation, impacting climate and the dispersion of tracers, like nutrients. In recent decades, the quality of observations and numerical simulations of internal wave processes, and their interpretation, has improved significantly, leading to rapid advances in internal wave research.

Original languageEnglish (US)
Title of host publicationEncyclopedia of Ocean Sciences
PublisherElsevier
Pages622-632
Number of pages11
ISBN (Electronic)9780128130810
ISBN (Print)9780128130827
DOIs
StatePublished - Jan 1 2019

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Keywords

  • Beams
  • Dead water
  • Inertial waves
  • Interfacial waves
  • Internal tides
  • Lee-waves
  • Mixing
  • Wavenumber frequency spectra

Cite this

Buijsman, M. C., Arbic, B. K., Kelly, S. M., & Waterhouse, A. F. (2019). Internal gravity waves. In Encyclopedia of Ocean Sciences (pp. 622-632). Elsevier. https://doi.org/10.1016/B978-0-12-409548-9.04160-9