A synoptic study on tsunami-like sea level oscillations along the west coast of Korea using an unstructured-grid ocean model

Cho, Kyoung‐Ho; Choi, Jin‐Yong; Park, Kwang-Soon; Hyun, Sangmin; Oh, Yuri; Park, Jun-Young

doi:10.2112/si65-115.1

Cited by 21 publications

(20 citation statements)

References 18 publications

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“…[] and Cho et al . [] reproduced the long wave amplitude similar to the observation within the eastern part of the Yellow Sea; whereas, Eom et al . [] used the whole Yellow Sea as their two‐dimensional model domain.…”

Section: Data and Model Descriptionmentioning

confidence: 99%

“…[] and Cho et al . [] used a moving atmospheric pressure jump traveling speed of about 24 m/s. In order to examine the dynamic characteristics during the growth of the meteorologically induced the long waves, Choi et al .…”

Section: Data and Model Descriptionmentioning

confidence: 99%

“…[] and Cho et al . [] used the bathymetry from KorBathy30s, which is referenced to the chart datum. They did not add the sum of the amplitudes from the four largest tidal constituents to the bathymetry data in their idealized process studies.…”

Section: Data and Model Descriptionmentioning

confidence: 99%

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Meteotsunami‐tide interactions and high‐frequency sea level oscillations in the eastern Yellow Sea

2014

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While an air pressure jump was moving southeastward over the shallow water region of the eastern Yellow Sea in March 2007, a long ocean wave (meteotsunami) was generated and amplified due to the Proudman resonance. The long wave arrived at the coast during high tide with wave amplitude of 1.4 m and seawater overflew seawalls and inundated the land. High-frequency sea level oscillations continued for 8-9 h after the long wave hit a local coast. The Moon's age was 12 days, and the tidal range was about 4 m between neap and spring tides. Two-dimensional numerical simulations were performed, to reproduce amplification of the long ocean wave in offshore and oscillations of sea level at the coast. Both tidal elevation and tidal currents were found to affect the growth of the long wave amplitude by the interactions between tides and the long wave. Long wave-tides interactions are important processes for the accurate prediction of long wave arrival time and maximum height and for the reduction of coastal hazards in the macrotidal region. After the long wave hit the coast of remote regions, reflected waves propagated radially from remote regions to a local coast. The high-frequency sea level oscillations at a local observation station continued, until all of the reflected waves from remote regions had passed by. It was concluded that high-frequency oscillations of sea level are generated not only by local reflection of the long wave, but also by propagation of the reflected waves from remote regions.

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Section: Data and Model Descriptionmentioning

confidence: 99%

Section: Data and Model Descriptionmentioning

confidence: 99%

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Meteotsunami‐tide interactions and high‐frequency sea level oscillations in the eastern Yellow Sea

2014

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“…Here, the barotropic long wave generated by the propagating pressure signal is amplified at the coast. It has often been suggested to be the main cause of meteotsunamis occurring worldwide, for example, in Ciutadella Harbour, Balearic Islands (Gomis et al 1993;Garcies et al 1996;Monserrat et al 2006); in Nagasaki Bay, Japan (Hibiya and Kajiura 1982); along the Croatian coast in the Adriatic Sea (Orlić 1980); in southern United Kingdom (Haslett and Bryant 2009;Tappin et al 2013); and off the west coast of Korea (Cho et al 2013). Greenspan (1956) described the amplification of the resonance oscillation when the alongshore component of the atmospheric disturbance speed is the same as the phase speed of the edge waves.…”

Section: Introductionmentioning

confidence: 99%

Observations of meteorological tsunamis along the south-west Australian coast

Pattiaratchi

Wijeratne

2014

Nat Hazards

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Tide gauge data were used to identify the occurrence, characteristics, and cause of tsunamis of meteorological origin (termed 'meteotsunamis') along the Western Australian coast. This is the first study to identify meteotsunamis in this region, and the results indicated that they occur frequently. Although meteotsunamis are not catastrophic to the extent of major seismically induced basin-scale events, the wave heights of meteotsunamis examined at some local stations in this study were higher than those recorded through seismic tsunamis. In June 2012, a meteotsunami contributed to an extreme water-level event at Fremantle, which recorded the highest water level in over 115 years. Meteotsunamis (wave heights [0.4 m, when the mean tidal range in the region is *0.5 m) were found to coincide with thunderstorms in summer and the passage of low-pressure systems during winter. Spectral analysis of tide gauge time series records showed that existing continental seiche oscillations (periods between 30 min and 5 h) were enhanced during the meteotsunamis, with a high proportion of energy transferred to the continental shelf oscillation period. Three recent meteotsunami events (22 March 2010, 10 June 2012, and 7 January 2013) two due to summer thunderstorms and one due to a winter frontal system were chosen for detailed analysis. The meteotsunami amplitudes were up to a factor 2 larger than the local tidal range and sometimes contributed up to 85 % of the non-tidal water signal. A single meteorological event was found to generate several meteotsunamis along the coast, up to 500 km apart, as the air pressure disturbance propagated over the continental shelf; however, the topography and local bathymetry of the continental shelf defined the local sea-level resonance characteristics at each location. With the available data (sea level and meteorological), the exact mechanisms for the generation of the meteotsunamis could not be isolated.

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“…Meteotsunami waves, which typically have periods from 2 mins to 2 hours2, have caused disastrous effects to property and life along coasts worldwide due to their significant runup and strong associated currents345678. Even meteotsunamis with seemingly modest heights (~0.3 m) can produce dangerous currents910 that have created hazardous conditions for recreational users11.…”

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confidence: 99%

Meteotsunamis in the Laurentian Great Lakes

Bechle

Kristovich

Anderson

et al. 2016

Sci Rep

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The generation mechanism of meteotsunamis, which are meteorologically induced water waves with spatial/temporal characteristics and behavior similar to seismic tsunamis, is poorly understood. We quantify meteotsunamis in terms of seasonality, causes, and occurrence frequency through the analysis of long-term water level records in the Laurentian Great Lakes. The majority of the observed meteotsunamis happen from late-spring to mid-summer and are associated primarily with convective storms. Meteotsunami events of potentially dangerous magnitude (height > 0.3 m) occur an average of 106 times per year throughout the region. These results reveal that meteotsunamis are much more frequent than follow from historic anecdotal reports. Future climate scenarios over the United States show a likely increase in the number of days favorable to severe convective storm formation over the Great Lakes, particularly in the spring season. This would suggest that the convectively associated meteotsunamis in these regions may experience an increase in occurrence frequency or a temporal shift in occurrence to earlier in the warm season. To date, meteotsunamis in the area of the Great Lakes have been an overlooked hazard.

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A synoptic study on tsunami-like sea level oscillations along the west coast of Korea using an unstructured-grid ocean model

Cited by 21 publications

References 18 publications

Meteotsunami‐tide interactions and high‐frequency sea level oscillations in the eastern Yellow Sea

Meteotsunami‐tide interactions and high‐frequency sea level oscillations in the eastern Yellow Sea

Observations of meteorological tsunamis along the south-west Australian coast

Meteotsunamis in the Laurentian Great Lakes

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