This work has benefited from helpful conversations with M. Hoecker-Martinez and critical readings by S. Thorpe, Zhiyu Liu, and two anonymous reviewers. The project was funded by the National Science Foundation via Grants 0424133, 0622922, and 0728375.
Dillon, T., , J. Moum, , T. Chereskin, , and D. Caldwell, 1989: Zonal momentum balance at the equator. J. Phys. Oceanogr., 19 , 561–570.
Hebert, D., , J. Moum, , C. Paulson, , and D. Caldwell, 1992: Turbulence and internal waves at the equator. Part II: Details of a single event. J. Phys. Oceanogr., 22 , 1346–1356.
Moum, J., , D. Hebert, , C. Paulson, , and D. Caldwell, 1992: Turbulence and internal waves at the equator. Part I: Statistics from towed thermistor chains and a microstructure profiler. J. Phys. Oceanogr., 22 , 1330–1345.
Moum, J., , J. Nash, , and W. Smyth, 2011: Narrowband oscillations in the upper equatorial ocean. Part I: Interpretation as shear instabilities. J. Phys. Oceanogr., 41 , 397–411.
Newsom, R., , and R. Banta, 2003: Shear flow instability in the stable nocturnal boundary layer as observed by Doppler lidar during CASES-99. J. Atmos. Sci., 60 , 16–33.
Peters, H., , M. Gregg, , and T. Sanford, 1994: The diurnal cycle of the upper equatorial ocean: Turbulence, fine-scale shear, and mean shear. J. Geophys. Res., 99 , 7707–7723.
Putrevu, U., , and A. Svendsen, 1992: Shear instability of longshore currents: A numerical study. J. Geophys. Res., 97 , 7283–7303.
Skyllingstad, E., , and D. Denbo, 1994: The role of internal gravity waves in the equatorial current system. J. Phys. Oceanogr., 24 , 2093–2110.
Smyth, W., , and J. Moum, 2002: Shear instability and gravity wave saturation in an asymmetrically stratified jet. Dyn. Atmos. Oceans, 35 , 265–294.
Smyth, W., , and S. Kimura, 2007: Instability and diapycnal momentum transport in a double-diffusive stratified shear layer. J. Phys. Oceanogr., 37 , 1551–1565.
Sun, C., , W. Smyth, , and J. Moum, 1998: Dynamic instability of stratified shear flow in the upper equatorial Pacific. J. Geophys. Res., 103 , 10323–10337.
Wang, D., , and P. Müller, 2002: Effects of equatorial undercurrent shear on upper-ocean mixing and internal waves. J. Phys. Oceanogr., 32 , 1041–1057.
Wang, D., , J. McWilliams, , and W. Large, 1998: Large eddy simulation of the diurnal cycle of deep equatorial turbulence. J. Phys. Oceanogr., 28 , 129–148.