The figure depicts spectra for hourly (red), and the LMG-sampled and block-averaged fields (blue and green lines). For reference, k −2 and k −3 curves are plotted (gray lines). For reference, k −2 and k −3 curves are plotted (gray lines).Ĭomparison between ADCP (solid) and model (dashed) spectra for the 58–98-m layer. In (c) the energy level of the divergent flow is a quarter of the energy level of the rotational flow. Synthetic data KE spectra and its decompositions into rotational and divergent components for different combinations of horizontally rotational and divergent flows: (a) rotational flow, (b) rotational flow combined with a high-pass (>40 km) divergent flow, and (c) rotational flow combined with a high-pass (>40 km) divergent flow. For comparison, also shown is the equivalent spectrum inferred from the ADCP spectrum by assuming geostrophy.
In (c),(d), the confidence limits are shown as single error bars.ĪDCP KE spectra for the 58–98-m layer from subtransects to the north (solid) and to the south (dashed) of the Polar Front.ĪltiKa SSH variance along-track wavenumber spectra. In (a)–(c), shades represent 95% confidence limits. The figure depicts across-track (red line) and along-track (blue line) KE spectra and the spectral decomposition into horizontally rotational (green line) and divergent components (yellow line). Colors represent a snapshot of surface vertical vorticity normalized by the local inertial frequency.ĪDCP KE spectra for three layers, (a) 26–50, (b) 58–98, and (c) 106–202 m, and wave–vortex decomposition for the 58–98-m layer: (d) total kinetic energy, (e) the geostrophic flow (vortex), and (f) the inertia–gravity wave components of across-track and along-track components. (c) Subdomain of llc4320 simulation used in this study. (b) Segments of tracks from AltiKa altimeter. The black line depicts the mean position of the Polar Front. (a) Gridded mean (vectors) and eddy kinetic energy (colors) from ADCP data at 26 m (uppermost bin).
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