Nonlinear internal wave spirals in the northern East China Sea

摘要: Oceanic internal waves are known to be important the understanding of underwater acoustics, marine biogeochemistry, submarine navigation and engineering, Earth’s climate. In spite importance increased knowledge their ubiquity, wave generation is still poorly understood in most parts world’s oceans. Here, we use satellite synthetic aperture radar images, in-situ observations, numerical models (1) show that energy (having relatively high amplitude) radiates from a shallow sill East China Sea all directions, but with significant time lag dependent on background conditions, (2) reveal fronts locally formed often favorable conditions for re-initiation, (3) demonstrate resulting variety patterns. These findings would case any broad shelf having sills time-varying therefore have implications redistribution materials global as well regional ocean.