OTHER TYPES OF WAVES

BREAKERS

BREAKERS

spilling breaker

surging breaker

plunging breakers

BREAKERS VIDEOS

http://www.youtube.com/watch?v=C10qD7fKQXI

http://www.youtube.com/watch?v=QPxLs0Cv4zY

LONGSHORE CURRENT

RIP CURRENTS

TSUNAMIS

• also called seismic sea waves• should not be called tidal waves• result from sudden movement of ocean bottom – earthquake, volcano, landslide

TSUNAMIS

TSUNAMIS

• travel hundreds of miles per hour• since water is so deep at sea, undetected by boats

• when hit shallow water at coast, build up a wall of water• can be many feet tall

• tsunamis can be extremely damaging

ex: December 26, 2004 – Indian Ocean – 230,000 died – waves up to 98 ft. tall

ex: March 11, 2011 – Japanese Tsunami – 20,000 died

http://www.youtube.com/watch?NR=1&v=5-zfCBCq-8I

• most common in Pacific Ocean

• there is an international system of seismographs to detect earthquakes, etc. and warn of possible tsunamis

mangroves may help protect against tsunamis

STORM SURGE

• surface waves caused by storm winds

• strong winds pile up water on coast – causes sea level to rise temporarily

• up to 20 feet higher than normal

• floods low lying areas

• especially damaging if occurs with high tide

http://www.nhc.noaa.gov/surge/

ROGUE WAVES

• also called freak waves

• occur when two or more wave crests add together to form a short-lived very high wave