Generation and backreaction of spontaneously emitted inertia-gravity waves

Norihiko Sugimoto, Riwal Plougonven

研究成果: Article査読

4 被引用数 (Scopus)

抄録

Spontaneous generation of inertia-gravity waves from balanced flows is investigated in idealized simulations of dipoles. Long integrations are performed for dipoles with different Rossby numbers (Ro) to identify the backreaction of the waves. Emission of waves is detected only for large enough Ro (>0.15), and it then leads to a slow decay of the dipole's kinetic energy. A major finding is that this decay is well captured by the simulations, although positions of the waves appear still sensitive to the resolution, and their maximum vertical velocity increases linearly with resolution. The interpretation is that the emission process is well resolved and fairly insensitive to resolution, while the propagation and dissipation at small scales remains sensitive to resolution. The implication is that the simulations yield an estimate of the leakage of energy from balanced motions to gravity waves, providing a useful estimate of a poorly constrained flux in the ocean's energy budget.

本文言語English
ページ(範囲)3519-3525
ページ数7
ジャーナルGeophysical Research Letters
43
7
DOI
出版ステータスPublished - 2016 4 16

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

フィンガープリント 「Generation and backreaction of spontaneously emitted inertia-gravity waves」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル