Direct numerical simulation of the roll-off range of internal wave shear spectra in the ocean

Toshiyuki Hibiya, Yoshihiro Niwa, Kensuke Nakajima, Nobuo Suginohara

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)


Oceanic internal gravity waves play an important role in the dynamics of the ocean, providing a link in the overall energy cascade from large forcing scales to small dissipation scales. Quantifying the cascade of energy available for mixing processes in the ocean interior, for example, is essential to accurate modeling of the oceanic general circulation. In the present study, based on an extensive numerical model that resolves most of the internal wave spectrum, the dynamics of the process by which internal waves dissipate their energy in the deep ocean are investigated. Putting all the calculated results together, we propose here a model for the dynamic balance of the internal wave spectrum wherein a downscale energy flux into the high vertical wavenumber near-inertial portion of the spectrum is balanced by energy dissipation at critical layers formed by high vertical wavenumber near-inertial flows.

Original languageEnglish
Article number96JC01001
Pages (from-to)14123-14129
Number of pages7
JournalJournal of Geophysical Research: Oceans
Issue numberC6
Publication statusPublished - 1996

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Oceanography
  • Forestry
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Space and Planetary Science
  • Earth and Planetary Sciences (miscellaneous)
  • Palaeontology


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