Nelson Violante-Carvalho
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View article: The Controlled Four-Parameter Method for cross-assignment of directional wave systems
The Controlled Four-Parameter Method for cross-assignment of directional wave systems Open
Cross-assignment of directional wave spectra is a critical task in wave data assimilation. Traditionally, most methods rely on two-parameter spectral distances or energy ranking approaches, which often fail to account for the complexities …
View article: Spatial and temporal variability of the Brazil current path: Diagnostics from satellite-derived altimetry and a global reanalysis product
Spatial and temporal variability of the Brazil current path: Diagnostics from satellite-derived altimetry and a global reanalysis product Open
View article: The Controlled Four-Parameter Method for Cross-Assignment of Directional Wave Systems
The Controlled Four-Parameter Method for Cross-Assignment of Directional Wave Systems Open
Cross-assignment of directional wave spectra is a critical task in wave data assimilation. Traditionally, most methods rely on two-parameter spectral distances or energy ranking approaches, which often fail to account for the complexities …
View article: The Effects of Ocean Eddy Dipoles on Opposing Swell Waves
The Effects of Ocean Eddy Dipoles on Opposing Swell Waves Open
View article: Spatial and Temporal Variability of the Brazil Current Path: Diagnostics from Satellite-Derived Altimetry and a Global Reanalysis Product
Spatial and Temporal Variability of the Brazil Current Path: Diagnostics from Satellite-Derived Altimetry and a Global Reanalysis Product Open
View article: Spatio-temporal regularization of global ocean waves obtained from\n satellite and their graphical representation
Spatio-temporal regularization of global ocean waves obtained from\n satellite and their graphical representation Open
An algorithm for representing irregular satellite data obtained from advanced\nsynthetic aperture radar (ASAR) uniformly in space and time is introduced and\ncomparison with WAVEWATCH III model (WW3) data is carried out. Swell global\ndata…
View article: Spatio-temporal regularization of global ocean waves obtained from satellite and their graphical representation
Spatio-temporal regularization of global ocean waves obtained from satellite and their graphical representation Open
An algorithm for representing irregular satellite data obtained from advanced synthetic aperture radar (ASAR) uniformly in space and time is introduced and comparison with WAVEWATCH III model (WW3) data is carried out. Swell global data fo…
View article: A Low-Cost Stereo Video System for Measuring Directional Wind Waves
A Low-Cost Stereo Video System for Measuring Directional Wind Waves Open
Typical oceanographic instruments are expensive, complex to build, and hard to deploy and require constant and specialized maintenance. In this paper, we present a cheap and simple technique to estimate a three-dimensional surface elevatio…
View article: SEASTAR: A Mission to Study Ocean Submesoscale Dynamics and Small-Scale Atmosphere-Ocean Processes in Coastal, Shelf and Polar Seas
SEASTAR: A Mission to Study Ocean Submesoscale Dynamics and Small-Scale Atmosphere-Ocean Processes in Coastal, Shelf and Polar Seas Open
High-resolution satellite images of ocean color and sea surface temperature reveal an abundance of ocean fronts, vortices and filaments at scales below 10 km but measurements of ocean surface dynamics at these scales are rare. There is inc…
View article: Waves and Swells in High Wind and Extreme Fetches, Measurements in the Southern Ocean
Waves and Swells in High Wind and Extreme Fetches, Measurements in the Southern Ocean Open
The generation and evolution of ocean waves by wind is one of the most complex phenomena in geophysics, and is of great practical significance. Predictive capabilities of respective wave models, however, are impaired by lack of field in si…
View article: SENSIBILIDADE DE ESPECTROS DE ONDAS OCEÂNICAS RECUPERADOS POR RADAR DE ABERTURA SINTÉTICA
SENSIBILIDADE DE ESPECTROS DE ONDAS OCEÂNICAS RECUPERADOS POR RADAR DE ABERTURA SINTÉTICA Open
SAR (Synthetic Aperture Radar ou Radar de Abertura Sintética) é o único sensor transportado por satélites capaz de medir o espectro direcional de ondas. Sua elevada cobertura espacial e temporal permite caracterizar o estado de mar, especi…