De La O-Navarrete, A., R., Funes-Rodríguez & M., Manzano-Sarabia (2023). Comparison of thermal fronts frequency and permanence using data of different spatialdimensions and satellite images resolution in California Current southern region. Revista de Biología Marina y Oceanografía. 58(3): 137-147. DOI: 10.22370/rbmo.2023.58.3.4260.
Amelia De La O-Navarrete 1, René Funes-Rodríguez 1 y Marlenne Manzano-Sarabia 2
The best dimension of spatial scale (quadrant dimension) and images resolution (1 and 4 km) were evaluated, with respect to frequency and permanence of oceanic thermal fronts that characterize seasonal and interannual variability of the California Current System during 2006- 2010, from the analysis of daily images of sea surface temperature (1 km Ultra High-Resolution Multi-Scale and Advance Very High-Resolution Radiometer resolution of 4 km pixel resolution). Fronts identification was performed using Single Edge Detection (SIED) algorithm and to identify the best distribution in the area different quadrant dimensions were compared (0.5°, 1.0° and 2.0° geographical latitude and longitude). 1.0° quadrant turned out to be the most suitable because it presented a lower dispersion of front frequency and a greater number of observations. Together with high-resolution images (1 km) they allowed to detect a greater number of mesoscale structures, which identifies seasonal and year-to-year variability of ocean dynamics in California Current southern portion.
Palabras clave: Frentes de temperatura; frecuencia de frentes; Oceanografía Satelital; Corriente de California
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