Resource Characterization and Statistical Modeling of Ocean Current at the Gulf Stream
AbstractWe developed a statistical ocean current model based on data collected from the Gulf Stream along the Florida Straits. Due to the random nature of ocean current velocity, the model was described by a Gaussian probability density function. Like wind speed distribution, the power spectral density (PSD) of ocean current velocity is distributed over a wide range of frequencies but characterized by distinguishable peaks resulting from tidal currents. Accordingly, the total velocity was considered as a sum of the mean velocity and a random component. To account for the tidal effect, a tidal current component was added based on PSD values. In addition, the model was formulated as a function of normalized depth that could be used at any site for resource characterization. For validation, the proposed model was used to predict mean velocity and standard deviation at four different sites along the Gulf Stream. Predicted values were then compared with measured data at those four locations, and a good correlation was observed.