Meteotsunami

Some Locations Exposed to Meteotsunamis

City	Country	Max Height (m)
Nagasaki Bay	Japan	4.8
Pohang Harbour	Korea	0.8
Longkou Harbour	China	3
Ciutadella Harbour	Spain	4
Gulf of Trieste	Italy	1.5
West Sicily	Italy	1.5
Malta	Malta	1

A meteotsunami or meteorological tsunami^[1] is a tsunami-like wave phenomenon of meteorological origin. Tsunamis and meteotsunamis propagate in the water in the same way and have the same coastal dynamics. In other words, for an observer on the coast where it strikes the two types would look the same. The difference is in their source only. One definition of a meteotsunami is as an atmospherically generated large amplitude seiche oscillation.

The principal source of these tsunami-like ocean waves are travelling 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).

See also

• Tsunami
• Historic tsunami
• Tsunami warning system (TWS)
• Deep-ocean Assessment and Reporting of Tsunamis (DART)
• Megatsunami
• Rip current
• Significant wave height
• Undular bore

References

1. ^ Tsunami Glossary 2008, UNESCO

External links

• Presentation on meteotsunamis by the Croatian Institute for OceanographyPDF
• Photos of the Rissaga in Spain (Ciutadella) 06-15-2006