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.
Rosburg, K. C., University of Rhode Island, USA, firstname.lastname@example.org
Donohue, K. A., University of Rhode Island, USA, email@example.com
Chassignet, E. P., Florida State University - COAPS, USA, firstname.lastname@example.org
Time: 16:00 - 18:00
Location: Poster/Exhibit Hall
Presentation is given by student: Yes