Estimating amplitudes of internal waves using satellite ocean colour imagery of the South China Sea

Su, Feng; Ho, Chung-Ru; Zheng, Quanan; Kuo, Nan-Jung

doi:10.1080/01431160802175397

Cited by 15 publications

(5 citation statements)

References 13 publications

(13 reference statements)

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“…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.…”

Section: Characteristics Of the Isws From Remote Sensing In The Scsmentioning

confidence: 99%

An Overview of Internal Solitary Waves in the South China Sea

2012

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Internal solitary waves (ISWs) are the nonlinear large amplitude waves existing in the oceanic pycnocline. They are very active in the northern South China Sea (SCS). With more and more remote sensing data, in situ observational data and the development of the numerical simulation technology, a number of studies on the characteristics, the source site, the generation, and evolution of the ISWs in the SCS are reported. In this paper, earlier studies on the ISWs in the SCS are summarized and some problems worthy of study are put forward.

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Section: Characteristics Of the Isws From Remote Sensing In The Scsmentioning

confidence: 99%

An Overview of Internal Solitary Waves in the South China Sea

2012

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“…Theories are required to relate the observed quantities such as the sea surface roughness [Zheng et al, 2001] or ocean color [Su et al, 2008] to the amplitude of ISWs. The larger the ISW, the more significant the sea surface features will be.…”

Section: Special Isw Features Observed By Satellite In the Scsmentioning

confidence: 99%

“…[10] In the open sea, the surface zone can be inspected using a satellite; even though the ISW cannot be observed directly, this is still the most economical way to see an ISW. Theories are required to relate the observed quantities such as the sea surface roughness [Zheng et al, 2001] or ocean color [Su et al, 2008] to the amplitude of ISWs. The larger the ISW, the more significant the sea surface features will be.…”

Section: Special Isw Features Observed By Satellite In the Scsmentioning

confidence: 99%

Interaction and generation of long-crested internal solitary waves in the South China Sea

Chen¹,

Liu²,

Wang³

et al. 2011

J. Geophys. Res.

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[1] Oblique nonlinear interactions based on the Kadomtsev-Petviashvili equation (also known as the two-dimensional Korteweg-de Vries equation) are extended to internal solitary waves (ISWs) to explain why the amplitude does not decrease owing to the geometric spreading of the cylindrical wavefronts in the South China Sea (SCS). This resonance theory is used to explain a satellite image exhibiting special features, and it is proposed that wave arcs of different amplitude resonate, providing a mechanism for reinforcing a wave by boosting the amplitude. The present theory suggests the amplitude of the ISW that propagates across the SCS basin depends on the interaction of ISWs originating from different sources; hence, studying the generation of an ISW from a single source location cannot predict the ISW correctly.

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“…Fortunately, we can observe the variation of chlorophyll concentration from the change of ocean color when internal waves pass by. The deep chlorophyll maximum (DCM) model has been used to demonstrate the internal tides in Sea-viewing Wide Field-of-view Sensor (SeaWiFS) ocean color imagery [9], [10]. The passing of internal tides may cause the change of surface chlorophyll concentration.…”

Section: B Chlorophyll Imagerymentioning

confidence: 99%

Internal wave observations in the northern South China Sea from satellite ocean color imagery

Kuo

et al. 2009

Oceans 2009-Europe

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The northern South China Sea (SCS) including the Luzon Strait, from around 19º to 22ºN latitude and from 114º to 122ºE longitude, is an ocean area where energetic internal waves occur frequently. In this study, satellite ocean color products from SeaWiFS (Sea-viewing Wide Field-of-view Sensor) and MODIS (Moderate Resolution Imaging Spectroradiometer) including true color and chlorophyll images are used for the statistical analysis of internal wave occurrence. For spatial distribution, fewer internal waves distributed in the east of 118ºE obviously originate from the Luzon Strait, and more internal waves in the west of 118ºE may propagate from the east or evolve into solitons originating from the eastern boundary owing to the fission effect of the shoaling thermocline. No internal wave is found east of the Luzon Strait. The lunar daily observed internal wave occurrence frequencies show that more internal waves are found after full moon and new moon, that is the spring tide. This indicates that the generation of internal waves in the northern SCS may relate to the internal tide. The monthly distribution of internal wave occurrence frequencies reveals that the high frequencies are distributed from May to August and reach a peak in July with a maximum frequency of 21.5%. The low occurrence frequencies are found in winter from November to February with a minimum frequency of 0.5% in January.

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Estimating amplitudes of internal waves using satellite ocean colour imagery of the South China Sea

Cited by 15 publications

References 13 publications

An Overview of Internal Solitary Waves in the South China Sea

An Overview of Internal Solitary Waves in the South China Sea

Interaction and generation of long-crested internal solitary waves in the South China Sea

Internal wave observations in the northern South China Sea from satellite ocean color imagery

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