Sectoral power spectra (ℓ = m) showing the Rossby wave power in the LCT data (black line) and the RDA data at depths 0.7 and 16.5 Mm (cyan and red lines). The power is normalized by the average of the m = 8 power in the range [−300, 100] nHz. The dash-dotted vertical lines in the m = 1 and m = 2 panels indicate the frequencies ω = −2Ωeq/(m + 1). The frequency axes of the m = 1 and m = 2 panels are shifted with respect to the other panels.
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