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Unformatted text preview: tides each day Movement is circular rather than east-west: When the sun and moon work together we get big spring tides, when they work against each other we get small neap tides. When tide is high on west coast it is low on the east coast ccwise in N hem, cwise in S hem Height of tide increases from center of ocean basin Main force = gravitational pull from the moon (creates bulge in earth) Smaller force = gravitational pull from the sun Earth-Moon-Sun system creates 28 day cycle: Biggest range = spring tides = full moon and new moon Smallest range = neap tides = half moon seen in the AM and PM ` Tide chart shows spring/neap tides, full/new/half moon phases, 2 Hi & 2 Lo tide Amphridromic points are points where there’s no tides because they revolve around these areas...
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This note was uploaded on 01/16/2012 for the course GEOS 212 taught by Professor George during the Fall '08 term at Arizona.
- Fall '08