Nonlinear internal waves in the South China Sea during winter
In Luzon Strait,strong tidal currents interact with submarine ridges to generate westward propagating internal waves of large amplitude and also the Kuroshio flows across with variable strength and direction.This study describes observations of these internal waves acquired in the deep basin of the northeastern South China Sea using pressure-recording inverted echo sounders during the winter of 2010–2011,with the goal of assessing the influence of meso-scale variability on their properties.The HYCOM predicts Kuroshio penetration across Luzon Strait during our observations.We find that horizontal stratification gradients and vertical shear provide weak predictions of internal wave amplitude modulation.Deviations in internal wave arrival time derived from integration of their first-mode phase speed along 2-dimensional ray-traced paths are quite well predicted,with wave arrivals occurring up to about 2 hours early during Kuroshio intrusion periods,consistent with the observations.Our results suggest that the internal wave field can be a sensitive indicator of meso-scale variability in Luzon Strait and the northeastern South China Sea.
Nonlinear internal wave Inverted echo sounder South China Sea Kuroshio
Jae-Hun Park David Farmer
Ocean Circulation and Climate Research Division, Korea Institute of Ocean Science and Technology, An Graduate School of Oceanography, University of Rhode Island, Narragansett, USA, 02882-1197
国际会议
The 17th Pacific -Asian Marginal Seas Meeting(第十七届太平洋与亚洲边缘海国际会议)
杭州
英文
542-549
2013-04-23（万方平台首次上网日期，不代表论文的发表时间）