From the Coriolis Effect article on Wikipedia, the following with regard to the Coriolis Effect on a rotating sphere:
By setting vn = 0, it can be seen immediately that (for positive φ and ω) a movement due east results in an acceleration due south. Similarly, setting ve = 0, it is seen that a movement due north results in an acceleration due east. In general, observed horizontally, looking along the direction of the movement causing the acceleration, the acceleration always is turned 90° to the right and of the same size regardless of the horizontal orientation.
My intuitive (but possibly incorrect) understanding is that if there are two points,
Point A and
Point B, at different latitudes in the Northern hemisphere, the Eastward velocities of these points are different because they are at different distances from the Earth's axis of rotation, and this causes the Coriolis effect for a rotating sphere.
If a projectile is fired due North from
Point A near the Equator towards
Point B near the North Pole, the projectile will start off with the higher Eastward velocity of
Point A, and will land to the East of
Point B, which is moving East at a slower velocity than the projectile.
Firstly, is that correct?
If that IS correct, that brings me to the quote off Wikipedia. The quote implies that, if a projectile is fired due East, it will experience a Coriolis force to the South. My intuitive explanation based on differences in velocities between origin and destination does not account for a Southwards movement at all, since the
Point A and
Point B velocities are identical if the points are on the same latitude.
What am I missing? Would a projectile fired due East or due West experience any North or South drift caused by the Coriolis effect (or anything else for that matter)?