Coupling between two inlets: Observation and modeling

Liu, P. L.-F.; Monserrat, Sebastià; Marcos, Marta; Rabinovich, Alexander B.

doi:10.1029/2002jc001478

Cited by 39 publications

(45 citation statements)

References 11 publications

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“…Porto Colom, Santa Ponça, Pollensa, Sa Rapita, Mahon) and at specific sites along the coast of the Spanish mainland (Tarragona, Barcelona, Valencia) Ciutadella Inlet is about 1 km long, 100 m wide and 5 m deep. The fundamental period of the inlet (Helmholtz mode) is approximately 10.5-10.6 min (Rabinovich et al, 1999;Liu et al, 2003). At other bays along the coast of the Balearic Islands, the eigen periods and the corresponding dominant periods of "rissaga" waves vary from 5 to 45 min.…”

Section: Longkou Harbour Chinamentioning

confidence: 99%

Meteotsunamis: atmospherically induced destructive ocean waves in the tsunami frequency band

Monserrat

Vilibić

Rabinovich

2006

Nat. Hazards Earth Syst. Sci.

416

393

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Abstract. In light of the recent enhanced activity in the study of tsunami waves and their source mechanisms, we consider tsunami-like waves that are induced by atmospheric processes rather than by seismic sources. These waves are mainly associated with atmospheric gravity waves, pressure jumps, frontal passages, squalls and other types of atmospheric disturbances, which normally generate barotropic ocean waves in the open ocean and amplify them near the coast through specific resonance mechanisms (Proudman, Greenspan, shelf, harbour). The main purpose of the present study is to describe this hazardous phenomenon, to show similarities and differences between seismic and meteorological tsunamis and to provide an overview of meteorological tsunamis in the World Ocean. It is shown that tsunamis and meteotsunamis have the same periods, same spatial scales, similar physical properties and affect the coast in a comparably destructive way. Some specific features of meteotsunamis make them akin to landslide-generated tsunamis. The generation efficiency of both phenomena depend on the Froude number (Fr), with resonance taking place when Fr∼1.0. Meteotsunamis are much less energetic than seismic tsunamis and that is why they are always local, while seismic tsunamis can have globally destructive effects. Destructive meteotsunamis are always the result of a combination of several resonant factors; the low probability of such a combination is the main reason why major meteotsunamis are infrequent and observed only at some specific locations in the ocean.

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Section: Longkou Harbour Chinamentioning

confidence: 99%

Meteotsunamis: atmospherically induced destructive ocean waves in the tsunami frequency band

Monserrat

Vilibić

Rabinovich

2006

Nat. Hazards Earth Syst. Sci.

416

393

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“…meteorological tsunamis. In particular they can exhibit special behaviour to tsunami arrival, directly due to their natural oscillation mode or to the resonant oscillation of the water body, inducing the so-called seiche (Monserrat et al, 1991;Gomis et al, 1993;Monserrat, 1996 and1998;Liu et al, 2003;Jansa et al, 2007).…”

Section: Geological Contextmentioning

confidence: 99%

The 1856 Djijelli (Algeria) earthquake and tsunami: source parameters and implications for tsunami hazard in the Balearic Islands

Roger

Hébert

2008

Nat. Hazards Earth Syst. Sci.

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Abstract. In 1856, one (or two) destructive earthquake(s) occurred off Djijelli (Algeria) and probably triggered a tsunami in the western Mediterranean Sea. Following recently published results of marine campaigns along the North-Algerian margin, a new source hypothesis for the earthquake has been proposed, and is constituted with a set of three "enéchelon" fault segments positioned in agreement with previous studies of this earthquake and with macroseismic data available. The geometrical parameters for this source, in agreement with a Mw = 7.2 earthquake, display an average 40 • NW dip, a 80 • strike and mean dimensions of 80 km (length) × 20 km (width). A coseismic slip of 1.5 m is consistent with an average convergence rate of about 5-6 mm/yr and a recurrence period of 300-400 years. They are then introduced in the tsunami modelling code to study the propagation across the Mediterranean Sea with a special attention towards the Balearic Islands. A focus on the two major towns, Palma (Majorca) and Mahon (Minorca) Harbours shows that these places are not the most exposed (maximum water heights less than 1 m) by tsunami waves coming from this part of the African margin. Specific amplifications revealed by modelling occur off the southern coast of Minorca and the southeastern coast of Majorca, mostly related to submarine bathymetric features, and are able to produce coastal wave heights larger than 1 to 2 m as offshore Alcalfar (Minorca). A deep submarine canyon southward Minorca leads to the amplification of waves up to two times on both sides of the canyon. However these modellings could not be compared to any historical observations, non-existent for these sites. This work is a contribution to the study of tsunami hazard in western Mediterranean based on modelling, and offers a first assessment of the tsunami exposure in the Balearic Islands.

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“…The phenomenon of resonant coupling between travelling gravity waves and the ocean is documented worldwide (Donn, 1959;Hibiya and Kajiura, 1982;Rabinovich, 1993;Dragani et al, 2002;Mercer et al, 2002). Due to its similarity to the tsunami waves (barotropic waves propagating in the whole water column), some authors call it meteotsunami (Defant, 1961;Rabinovich and Monserrat, 1998).…”

Section: Introductionmentioning

confidence: 99%

“…Both effects have been well documented and investigated in some parts of the Mediterranean Sea, such as the Balearic Islands (Tintore et al, 1988;Monserrat et al, 1991Monserrat et al, , 1998Gomis et al, 1993;Garcies et al, 1996;Rabinovich et al, 1999) and Sicily (Candela et al, 1999). Furthermore, an additional sea level set-up may occur as a result of topographic constraints of a basin (Vilibić et al, 2004), edge waves around an island or coupling between two adjacent inlets (Liu et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Numerical study of the Middle Adriatic coastal waters' sensitivity to the various air pressure travelling disturbances

Vilibić

2005

Ann. Geophys.

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Abstract. The paper documents resonant coupling between an air pressure travelling disturbance and the Middle Adriatic coastal waters, examined theoretically by using a barotropic numerical model and then comparing the model to the observed events. The model is forced first with a cosine and box air pressure disturbance travelling with a constant speed and direction but varying its eulerian period/duration, whereas the sensitivity to the disturbance speed is examined by varying it, keeping all the other parameters constant. Larger resonant transfer of energy is documented for shorter disturbances and for the box versus cosine variation, especially in the high-frequency domain. Bands of enlarged sea level amplification are found in front of Stari Grad Bay (6.7 and 11.0 min) close to its natural modes (6.1 and 10.6 min), which may be a reason for the very large amplification and sporadic severe floods observed at the inner bay area. The lack of coincidence in the Stari Grad and Vela Luka observed floods may be partially a result of different disturbance speeds and energy transfer rates due to various depths off the bays, yet some additional factors (basin shape, real disturbance energy, disturbance direction) should be examined in the future.

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Coupling between two inlets: Observation and modeling

Cited by 39 publications

References 11 publications

Meteotsunamis: atmospherically induced destructive ocean waves in the tsunami frequency band

Meteotsunamis: atmospherically induced destructive ocean waves in the tsunami frequency band

The 1856 Djijelli (Algeria) earthquake and tsunami: source parameters and implications for tsunami hazard in the Balearic Islands

Numerical study of the Middle Adriatic coastal waters' sensitivity to the various air pressure travelling disturbances

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