RT journal article
T1 Why Are the High Frequency Structures of the Sea Surface Temperature in the Brazil–Malvinas Confluence Area Difficult to Predict? An Explanation Based on Multiscale Imagery and Fractal Geometry
A1 Alonso del Rosario, José Juan
A1 Vidal Pérez, Juan Manuel
A1 Blázquez Gómez, Elizabeth
A2 Ciencias de la Tierra
A2 Ciencias y Técnicas de la Navegación y Construcciones Navales
A2 Física Aplicada
K1 Brazil–Malvinas Confluence
K1 fractal dimensions
K1 linear fractal interpolation
AB The Brazil–Malvinas Confluence (BMC) is one of the most complex oceanic areas in theEarth’s oceans and the prediction of high frequency structures tends to fail. The authors studiedthe BMC using Multiscale Ultrahigh Resolution (MUR) imagery for the Sea Surface Temperature(SST) to address why the predictions are not as good as expected. The studies were carried out bymeans of two approaches. The first approach is the non-linear fitting of a harmonic model keepingthe frequencies as parameters pixel by pixel. The second approach is from fractal geometry. The threefirst q-order Rényi dimensions were computed. At the same time, an inverse fractal interpolationwas carried out to compute the contraction factor. Both of them are related to the chaotic behavior ofnature. This work has three relevant contributions. The correlation between the harmonic models andthe SST data is quite poor in general, implying the low harmonicity, and low harmonic predictability,of the pixel-by-pixel time series. It is verified that the quasi-annual and quasi-semiannual waveshave periods of about 420 and 210 days, respectively. The second one is the confirmation of thehigh complexity of the BMC area because the three Rényi dimensions are equal. This has the strongfinding of the monofractality of the dynamic of the SST in the BMC. Finally, the contraction factor,one of the parameters of the fractal interpolation, is relatively high, implying the presence of highlycomplex internal structures in the SST temporal evolution.
PB MDPI
SN 2077-1312
YR 2023
FD 2023
LK http://hdl.handle.net/10498/30075
UL http://hdl.handle.net/10498/30075
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 10-nov-2026