Fig. 5: The internal wave energy dissipation in frequency-horizontal wavenumber space.
From: Oceanic eddies induce a rapid formation of an internal wave continuum
The energy dissipation cospectrum (log scale) in the frequency-horizontal-wavenumber space at 355 m depth for (a–c) 2 km simulations and (d–f) 500 m simulations in the eddy-only, eddy-wave, and wave-only cases, respectively. The energy dissipation cospectrum is computed using hourly Eulerian velocity and vertical viscosity fields (Nyquist frequency of ≈1.4 × 10−4 s−1; see Methods) and only the super-inertial part of the cospectrum is shown. Dashed, black vertical lines mark the horizontal wavenumber corresponding to eight grid spacings, after which horizontal numerical diffusion is significant. Gray colors indicate weak negative dissipation values that result from under-sampling of parameterized viscosity values (Methods and Supplementary Note 7). The mean and standard deviation of these negative values in (a–f) are −(2.5 ± 3.4) × 10−14, −(3.4 ± 4.1) × 10−12, −(4.3 ± 4.9) × 10−12, −(4.9 ± 6.4) × 10−14, −(5.1 ± 8.8) × 10−13, −(2.8 ± 3.6) × 10−12, respectively.
