e tides on the native 1/30 degree grid, then lowpass filter to 6 degrees or a little more, then interpolate to a 3 degree grid. That would produce anti-aliased transports that meet the Nyquist criteria. Instead, we'll do this sort of hybrid approach, where we'll solve transports on a 0.2 degree grid, then lowpass filter to 6 degrees (using the <tt>filt2</tt> function in the Climate Data Toolbox) and interpolate. So we might end up with a little bit of noise, but let's not be pedants.</li><li>Matlab's <tt>te