Figure 4

Power Spectral Density of the zonal (upper) and meridional (lower) velocity time series at different depths from mooring ADCPs at 10.5°N (a,e), 13°N (b,f), 15.5°N (c,g), and 18°N (d,h). Figures are plotted using MATLAB R2010b (http://www.mathworks.com/).