Upwelling rebound, ephemeral secondary pycnoclines, and the creation of a near-bottom wave guide over the Monterey Bay continental shelf
Cheriton, Olivia M.
McPhee-Shaw, Erika E.
Storlazzi, Curt D.
Rosenberger, Kurt J.
Shaw, William J.
Raanan, Ben Y.
MetadataShow full item record
Several sequential upwelling events were observed in fall 2012, using measurements from the outer half of the continental shelf in Monterey Bay, during which the infiltration of dense water onto the shelf created a secondary, near-bottom pycnocline. This deep pycnocline existed in concert with the near-surface pycnocline and enabled the propagation of near-bottom, cold, semidiurnal internal tidal bores, as well as energetic, high-frequency, nonlinear internal waves of elevation (IWOE). The IWOE occurred within 20m of the bottom, had amplitudes of 8–24 m, periods of 6–45 min, and depth-integrated energy fluxes up to 200Wm 1. Iribarren numbers (<0.03) indicate that these IWOE were nonbreaking in this region of the shelf. These observations further demonstrate how regional upwelling dynamics and the resulting bulk, cross-margin hydrography is a first-order control on the ability of internal waves, at tidal and higher frequencies, to propagate through continental shelf waters.
The article of record as published may be found at http://dx.doi.org/10.1002/2014GL061897The USGS data sets presented herein can be obtained by sending a written request to the corresponding author.
Showing items related by title, author, creator and subject.
Rudy Magne (LSEET); Fabrice Ardhuin; Vincent Rey (LSEET); Thomas H. C. Herbers (2005);The topographical scattering of gravity waves is investigated using a spectral energy balance equation that accounts for first order wave-bottom Bragg scattering. This model represents the bottom topography and surface ...
Null, James Mark. (Monterey, California. Naval Postgraduate School, 1995-03);In many strategic shallow water areas the geoacoustic properties of the sub-bottom are largely unknown. In this thesis it is demonstrated that inverse theory and measured data from a single hydrophone can be used to ...
Church, John Casey. (Monterey, California. Naval Postgraduate School, 1993-09);The momentum equation governing mean longshore currents on straight beaches is a balance of forcing from the momentum transfer of the oscillatory wave motion, turbulent momentum transfer (mixing), and bottom stress. Of ...