Unformatted text preview: -tides are caused by pull of moon (2/3) and sun 91/3)-Sun far more massive, but much farther away- key additional factor is rotation of earth-moon system and the centrifugal forces on the ocean-There is not just one, but two opposing bulges-due to the centrifugal force of the earth spinning-A tidal month-28 day lunar cycle controls the tides timing. Since a day is 24 hours, the tide is 50 minutes later each day.-Tidal bulges follow lunar position-moon does not stay over equator- up to 28.5 degrees north or south-solar Influence: Spring and Neap Tides -Spring tides :when the lunar and solar tide are at the same place and = largest tide possible-Neap tides: when the moon and sun are at 90 degree angle, the tides partially cancel each other out. -Tidal records for a typical month-Spring tides: constructive interference (interference means either the sun adds to its self or it destructs and takes away from one another)...
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- Spring '12
- Tide, 11 m, 15 degrees, breakers- form, 2 -g