TAO Data Support the Existence of Large High Frequency Variations in Cross‐Equatorial Overturning Circulation

Large amplitude oscillations in the meridional overturning circulation (MOC) have been found near equator all major ocean basins NEMO general model. With periods of 3-15 days and amplitudes ∼ ± 100 Sv Pacific, these shown to correspond zonally integrated equatorially trapped waves forced by winds within 10° N/S equator. Observations dynamic height from Tropical Atmosphere Ocean (TAO) mooring array equatorial Pacific also exhibit spectral peaks consistent with dispersion relation for waves. Here, we revisit TAO observations confirm that is simulations, supporting modelled large MOC oscillations. We show zonal structure frequency spectrum both simulations predicted changes baroclinic wave speed variation stratification across basin.