WAVE-CURRENT INTERACTION IN THE SURFZONE-INNER SHELF CIRCULATIONS
Wave effects on surfzone-inner shelf circulations are investigated with the ROMS-WEC model (Uchiyama et al., 2010), a three-dimensional, Eulerian wave-averaged Primitive equation ocean model based on a multiscale asymptotic theory with a vortex-force formalism (McWilliams et al., 2004), tightly coupled with a spectrum-peak refraction wave model. Cold upwelling filaments driven by fluctuating alongshore wind are evolved into spiral submesoscale eddies in an idealized inner-shelf configuration typical in the Southern California Bight. Alongshore topographic variations with incident swells induce persistent rip currents that frequently interact with the offshore eddies. Two-way wave and current interaction and effect of depth-induced wave breaking are examined to demonstrate that waves are substantial to modify offshore extent of the upwelling filaments leading to changes in SST and stratification. EKE and vorcitiy fields indicate that wave effects are responsible for changing submesoscale turbulence and stirring that occur dominantly about 5-15 km off the shore.
Kaida, H., Kobe University, Japan, firstname.lastname@example.org
Uchiyama, Y., Kobe University, Japan, email@example.com
McWilliams, J., University of California, Los Angeles, USA, firstname.lastname@example.org
Time: 16:00 - 18:00
Location: Poster/Exhibit Hall
Presentation is given by student: Yes