engleski

Tracing the source of the 2007 Ist meteotsunami

Destructive sea waves with crest-to-through heights surpassing 4 m, stroke funnel-shaped Široka Bay on the island of Ist in the afternoon hours of 22 August 2007, causing significant material damage and injuring one tourist. The event was related to an abrupt air pressure drop (4 hPa/15 min) propagating over coastal northern Adriatic with speed of 21-24 m/s. The pressure disturbance was studied in detail. In addition to having a Proudman resonance favourable speed, disturbance was long-lived, non dispersive and had increased energy on Široka Bay eigenoscillations period, all of which made it a suitable candidate for meteotsunami generation. The air pressure disturbance was presumably related to an elongated convective cloud which was generated over Apennines and which further strengthened while propagating across Adriatic Sea toward north-east. It is hypothesized that the passage of this cloud caused observed air pressure drops, and consequently, Široka Bay meteotsunami.

Meteotsunamis; Atmosphere; Waves

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