Steve Lentz provided his undertow model and associated Matlab codes and very helpful comments on the manuscript. Marlene Noble provided the HB ADCP and wind data, and Libe Washburn provided the SB ADCP data. David Salazar and Kirk Ireson are acknowledged for their tireless efforts in the field. Funding for this work is from the U.S. Department of Interior (M05AC12301), NOAA through the University of California (04-078.02SB), the state of California and Johnson Ohana Charitable Foundation through Heal the Ocean (SB080078), and the National Science Foundation (OCE-0957948).
Austin, J. A., , and J. A. Barth, 2002: Drifter behavior on the Oregon–Washington shelf during downwelling-favorable winds. J. Phys. Oceanogr., 32, 3132–3144.
Austin, J. A., , and S. J. Lentz, 2002: The inner shelf response to wind-driven upwelling and downwelling. J. Phys. Oceanogr., 32, 2171–2193.
Brink, K. H., , and R. D. Muench, 1986: Circulation in the Point Conception–Santa Barbara Channel region. J. Geophys. Res., 91 (C1), 877–895.
Dorman, C. E., , and C. D. Winant, 1995: Buoy observations of the atmosphere along the west coast of the United States, 1981-1990. J. Geophys. Res., 100, 16 029–16 044.
Fewings, M., , S. J. Lentz, , and J. Fredericks, 2008: Observations of cross-shelf flow driven by cross-shelf winds on the inner continental shelf. J. Phys. Oceanogr., 38, 2358–2378.
Kirincich, A. R., , S. J. Lentz, , and J. A. Barth, 2009: Wave-driven inner-shelf motions on the Oregon coast. J. Phys. Oceanogr., 39, 2942–2956.
LeBlond, P. H., , and L. A. Mysak, 1978: Waves in the Ocean. Elsevier, 602 pp.
Lentz, S. J., , M. Fewings, , P. Howd, , J. Fredericks, , and K. Hathaway, 2008: Observations and a model of undertow over the inner continental shelf. J. Phys. Oceanogr., 38, 2341–2357.
Ohlmann, J. C., , P. F. White, , A. L. Sybrandy, , and P. P. Niiler, 2005: GPS–cellular drifter technology for coastal ocean observing systems. J. Atmos. Oceanic Technol., 22, 1381–1388.
Omand, M. M., , J. J. Leichter, , P. J. S. Franks, , R. T. Guza, , A. J. Lucas, , and F. Feddersen, 2011: Physical and biological processes underlying the sudden surface appearance of a red-tide in the nearshore. Limnol. Oceanogr., 56, 787–801.
Pawlowicz, R., , R. C. Beardsley, , and S. J. Lentz, 2002: Classical tidal harmonic analysis including error estimates in MATLAB using T_TIDE. Comput. Geosci., 28, 929–937.
Poulain, P.-M., , R. Gerin, , E. Mauri, , and R. Pennel, 2009: Wind effects on drogued and undrogued drifters in the Eastern Mediterranean. J. Atmos. Oceanic Technol., 26, 1144–1156.
Reniers, A. J. H. M., , E. B. Thornton, , T. P. Stanton, , and J. A. Roelvink, 2004: Vertical flow structure during Sandy Duck: Observations and modeling. Coastal Eng., 51, 237–260.
Smith, R. L., 1988: Coefficients for sea surface wind stress, heat flux, and wind profiles as a function of wind speed and temperature. J. Geophys. Res., 93, 15 467–15 472.
Spydell, M. S., , F. Feddersen, , and R. T. Guza, 2009: Observations of drifter dispersion in the surfzone: The effect of sheared alongshore currents. J. Geophys. Res., 114, C07028, doi:10.1029/2009JC005328.
Winant, C. D., , E. P. Dever, , and M. C. Hendershott, 2003: Characteristic patterns of shelf circulation at the boundary between central and southern California. J. Geophys. Res., 108, 3021, doi:10.1029/2001JC001302.
Zou, Q., , A. J. Bowen, , and A. E. Hay, 2006: Vertical distribution of wave shear stress in variable water depth: Theory and field observations. J. Geophys. Res., 111, C09032, doi:10.1029/2005JC003300.