CLASS 5 Coastal Currents and Processes Above the curve=big wave and small wind, below the curve= small growing wind with big wind Wave patterns along shore & how drive longshore transport & longshore currents- Waves lose velocity and slows down as friction from the shore arises, longshore transports is when waves come in at an angle and out straight and it drives sand down the beach, longshore current is when waves come in at an angle and drive water a certain direction Role of LT in sediment cycle- Longshore current drives longshore transport of sediment down the beach, once the driven sand hits a submarine canyon it is transported out into the deep ocean floor Global pattern of LT- LONGSHORE TRANSPORT GOES IN A SOUTHWARD DIRECTION IN THE NORTHERN HEMISPHERE AND NORTHWARD IN THE SOUTHERN HEMISPHERE, SO ALL LONGSHORE TRANSPORT HEADS TOWARDS THE EQUATOR Movie of longshore transport: Beach = river of sand!- Longshore current and transport only takes place inside the surf zone.
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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.