Mike Mayberry wrote:
As the moon revolves around the Earth it pulls the sea towards it.
I'm sure you know this, Mike, as will most readers on this forum - it's just a post in case anyone gets the wrong idea from the above...
True, though if it was as simple as that there would only be one tide a day, whereas most places (due to orbital physics I profess no grasp of) experience 'semi-diurnal tides' which is why peak lows or highs are typically only 12hrs separated. Highs occur as the moon transits above, but also on the opposite side of the Earth at the same time. Add to that the effect of the Sun's gravitational force (Springs and Neaps...) and bathymetry and it's no wonder it's all gets somewhat variable even before local geography, wind and air pressure are factored in. I've a nasty feeling the dreaded 'Coriolis effect' may even stick it's beak in here somewhere (SteveB...?!!!).
Not in response to Mike's post, but...
The alignment or otherwise of the Moon and Sun's forces don't result in much change in water height in open expanses of deep ocean; it is how this small variation in water level expresses itself when interracting in the shallow/constricted areas where paddlers are most likely to be found (i.e. near the coast!) that it all gets significant in terms of flow and height.
Err, that's probably a muddled puddle, reading it back; if so the mod's can delete with gay abandon and I'll not be offended :-)
Bards (not 'Buzz'...!!!)