EOSC 314 Lecture Notes - Lecture 17: Angular Distance, Declination, Amphidromic Point
6 Oct 2017
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Document Summary
What causes tides: complex interaction between gravitational and rotational forces acting on the earth-moon-sun system, these are the generating forces for tidal waves". Lunar bulges: result when force pushes water into two simultaneous bulges, one toward moon, one away from moon, moon revolving around earth. Solar bulges: similar to lunar bulges but less than half the sie, moon loser to earth, exerts greater gravitational force. Ebb tide: water moves away from shore. Tidal range: difference between high tide and low tide. Syzygy: moon, earth, sun aligned, greatest gravitational force. Quadrature: moon is first or third quarter phase, right angle with moon and sun. Spring tides: new or full moons, tidal greatest, highest highs and lowest lows, syzygy. Neap tides: quarter moons, tidal range least, quadrature. Monthly tidal cycle: new moon, moon between earth and sun, cannot be seen from earth, full moon, moon and sun opposite, quarter moon, moon appears half lit.
