Program and Agenda

Abstract

COMPARISON OF THE 1/25° ASSIMILATED GULF OF MEXICO HYCOM WITH OBSERVATIONS IN THE LOOP CURRENT EDDY FORMATION REGION

Accurate high-resolution ocean models are required for hurricane and oil spill pathway predictions, and to enhance the dynamical understanding of circulation dynamics. In order to investigate Loop Current dynamics, including eddy-shedding mechanisms and the forcing of deep flow in the Gulf of Mexico, an array centered near 26°N 87°W consisting of 9 full-depth moorings, 7 near-bottom moorings, and 25 pressure sensing inverted echo sounders, was deployed from April 2009 through November 2011. Here observations are compared to output from the data-assimilating 1/25° Gulf of Mexico HYbrid Coordinate Ocean Model to assess the model’s performance. In the thermocline, model-to-mooring comparison revealed high correlations for temperature and moderate to high correlations for both zonal and meridional velocity, with array-averaged correlations of 0.94, 0.52, and 0.65 respectively. Loop Current meander wavenumber and phase speeds compared well for periods between 100-20 days. Poor coherence between model and observations occurred for frequencies higher than 1/20 day-1. Modeled and observed array-averaged deep eddy kinetic energy increased rapidly during Loop Current Eddy separations, however, modeled eddy kinetic energy was about half the observed values.

ePoster:

Authors

Rosburg, K. C., University of Rhode Island, USA, rosburk@my.uri.edu

Donohue, K. A., University of Rhode Island, USA, kdonohue@mail.uri.edu

Chassignet, E. P., Florida State University - COAPS, USA, echassignet@fsu.edu

Details

Poster presentation

Session #:058
Date: 2/26/2014
Time: 16:00 - 18:00
Location: Poster/Exhibit Hall

Presentation is given by student: Yes

PosterID: 2902