Program and Agenda

Abstract

NEARSHORE ANISOTROPIC RELATIVE DISPERSION IN SOUTHERN CALIFORNIA

Knowledge of dispersion in nearshore oceans is important for many applications including the transport and fate of pollutants and the dynamics of nearshore ecosystems. We present two-particle dispersion statistics calculated from high-resolution numerical simulations of the Southern California Bight. The relative dispersion is analyzed with respect to the coastal geometry, bathymetry, eddy kinetic energy, and the relative magnitudes of strain and vorticity. Headlands are more energetic and dispersive than bays. Relative diffusivity estimates are smaller and more anisotropic close to shore. Farther from shore, the relative diffusivity increases and becomes less anisotropic, approaching isotropy ~10 km from the coast. The degree of anisotropy of the relative diffusivity is qualitatively consistent with that for eddy kinetic energy. The total relative diffusivity as a function of pair separation distance is consistent with available drifter observations. The results provide useful information for the design of sub-grid scale mixing parameterizations as well as quantifying the transport and dispersal of dissolved pollutants and biological propagules.

ePoster: http://journals.ametsoc.org/doi/abs/10.1175/JPO-D-13-011.1

Authors

Romero, L., University of California, Santa Barbara, USA, leromero@eri.ucsb.edu

Uchiyama, Y., Kobe University, Japan, uchiyama@harbor.kobe-u.ac.jp

Ohlmann, J. C., University of California, Santa Barbara, USA, carter@eri.ucsb.edu

McWilliams, J. C., University of California, Los Angeles, USA, jcm@atmos.ucla.edu

Siegel, D. A., University of California, Santa Barbara, USA, davey@eri.ucsb.edu

Details

Poster presentation

Session #:027
Date: 2/27/2014
Time: 16:00 - 18:00
Location: Poster/Exhibit Hall

Presentation is given by student: No

PosterID: 460