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Meteotsunami
A meteotsunami or meteorological tsunami〔(Tsunami Glossary 2008 ), UNESCO〕 is a tsunami-like wave phenomenon of meteorological (atmosphere and air pressure related) origin. Meteotsunamis propagate in the water in the same way as other waves, including tsunamis, and have the same coastal dynamics, but unlike tsunamis, they are not caused by geological events in the earth's crust ("plate tectonics") nor by impact events such as landslide and meteor strikes. Instead they are essentially a kind of storm surge - a raising of sea level or large amplitude seiche oscillation in the sea, caused by intense low pressure or certain wind conditions associated with tropical storms and hurricanes, in the troposphere. These kinds of waves are called meteotsunamis because, for an observer on the coast where it strikes, the two types would look the same. The difference is in their source only.
These tsunami-like ocean waves are principally caused by traveling air pressure disturbances, including those associated with atmospheric gravity waves, roll clouds, pressure jumps, frontal passages, and squalls, which normally generate barotropic ocean waves in the open ocean and amplify them near the coast through specific resonance mechanisms. In contrast to "ordinary" impulse-type tsunami sources, a travelling atmospheric disturbance normally interacts with the ocean over a limited period of time (from several minutes to several hours).
These types of waves are common all over the world and are better known by their local names: ''rissaga'' (Catalan), ''milghuba'' (Maltese), ''marrobbio'' (Italian), ''abiki'' (Japanese), ''šćiga'' (Croatian).
== Tropical cyclone storm surges ==
Meteotsunami associated with tropical cyclones storm surges can be particularly destructive, typically arriving shortly after landfall of the storm's eye.〔(Eyewitness video ) of Supertyphoon Haiyan's meteotsunamic storm surge on November 6, 2013〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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