Journal
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
Volume 119, Issue 10, Pages 6725-6742Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1002/2013JC009788
Keywords
meteotsunami; Proudman resonance; long wave-tide interactions; the Yellow Sea; tides; sea level oscillation
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Funding
- Ministry of Oceans and Fisheries, Korea
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2009-0077986]
- Korea Meteorological Administration Research and Development Program [CATER 2012-2080]
- National Research Foundation of Korea [2009-0077986] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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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