Sieving nonlinear internal waves through path prediction

Abstract

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An Overview of Internal Solitary Waves in the South China Sea

“…Near the Dongsha Islands, the westward propagating huge ISWs were often encountered, diffracted, and separated by the reef into the northern, the southern, and the middle parts. Finally, the northern and southern parts of the waves continued to propagate westward, merged after passing the island, and interacted with each other, while the middle part was reflected eastward (e.g., Liu et al 2004;Chao et al 2008;Zhao et al 2008). About 22% of ISW packets distributed in the east of 118°E obviously originated from the LS, and 78% of ISW packets west of 118°E might propagate from the east or evolve into the ISWs originating from the east boundary owing to the fission effect of shoaling thermocline (Zheng et al 2007;Ho et al 2009).…”

“…In fact, since 1970s, satellite imagery has provided an effective tool for detecting the ISWs in the northern SCS (Fett and Rabe 1977). Recently, European Remote Sensing (ERS) satellite 1/2 SAR, RADARSAT ScanSAR, SPOT, Landsat, IRS and NOAA AVHRR, Satellite Pour l'Observation de la Terre (SPOT) 1-5, and Envisat images from both optical and microwave sensors, including satellite ocean color products from SeaWiFS (Sea-viewing Wide Field-of-view Sensor) and MODIS (Moderate Resolution Imaging Spectroradiometer), etc., were employed widely to the study of ISWs in the SCS (e.g., Liu et al 1998;Zheng et al 2001;Liu et al 2004;Zhao et al 2004a, b;Zheng et al 2007;Chao et al 2008;Li et al 2008;Du et al 2008;Su et al 2008;Zhao et al 2008;Ho et al 2009). Based on the in situ or historical observational data concurrent with the satellite observations, the ISW parameters, such as the wave length, half width, and phase speed of the ISW could be retrieved based on the KdV equation model or a two-layer model.…”