My work deals a lot with 3D geometry.  Because I am seeing this more and more in published papers, I wanted to point something out.  This is an image from the Wikipedia page on the ‘torus’.  Notice the red arrow is the ‘poloidal’ direction.  This direction has almost invariably been called the ‘toroidal’ direction in the meteorology literature.  That’s simply wrong.  It matters because we might reasonably be concerned with the toroidal direction in many flows (I’m thinking of hurricanes).  So, let’s get it right.