Journal
SCIENTIFIC REPORTS
Volume 8, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41598-018-21461-3
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Funding
- U. S. Office of Naval Research [N00014-13-1-0510, SAVEX-15]
- KIOST (Ocean Research Stations program)
- KIOST [PE99331]
- KRISO [PES1940]
- Korea Hydrographic and Oceanographic Agency (KHOA) through the application program of Ieodo Ocean Research Station
- Basic Science Research through the NRF of Korea - Ministry of Education [NRF-2015R1D1A1A02062252]
- Development of Ocean-Typhoon Algorithms project - ETRI, which is a subproject of Development of Geostationary Meteorological Satellite Ground Segment program - NMSC of KMA [NMSC-2016-01]
- project titled 'Deep Water Circulation and Material Cycling in the East Sea' - Ministry of Oceans and Fisheries, Korea
- German Aerospace Center (DLR) [ATI_OCEA0391]
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Oceanic internal waves are known to be important to the understanding of underwater acoustics, marine biogeochemistry, submarine navigation and engineering, and the Earth's climate. In spite of the importance and increased knowledge of their ubiquity, the wave generation is still poorly understood in most parts of the world's oceans. Here, we use satellite synthetic aperture radar images, in-situ observations, and numerical models to (1) show that wave energy (having relatively high amplitude) radiates from a shallow sill in the East China Sea in all directions, but with a significant time lag dependent on background conditions, (2) reveal that wave fronts are locally formed with often favorable conditions for re-initiation, and (3) demonstrate the resulting variety of wave patterns. These findings would be the case for any broad shelf having shallow sills with time-varying conditions, and therefore have significant implications on the redistribution of energy and materials in the global as well as regional ocean.
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