Sensors 2008, 8(6), 3633-3642; doi:10.3390/s8063633
Article

Free and Forced Rossby Waves in the Western South China Sea Inferred from Jason-1 Satellite Altimetry Data

Key Laboratory of Tropical Marine Environmental Dynamics, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, P.R. China
* Author to whom correspondence should be addressed.
Received: 24 January 2008; in revised form: 23 May 2008 / Accepted: 23 May 2008 / Published: 1 June 2008
(This article belongs to the Special Issue Ocean Remote Sensing)
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Abstract: Data from a subsurface mooring deployed in the western South China Sea shows clear intra-seasonal oscillations (ISO) at the period of 40~70 days. Analysis of remotelysensed sea surface height (SSH) anomalies in the same area indicates that these ISO signals propagate both eastward and westward. Time-longitude diagrams of ISO signals in SSH anomalies and wind-stress curl indicate that the eastward propagating SSH anomalies is forced by wind-stress curl. This is also confirmed by lag correlation between SSH anomalies and the wind-stress-curl index (wind stress curl averaged over 109.5ºE -115ºE and 12ºN -13.5ºN). Lag correlation of SSH anomaly suggests that the westward propagating signals are free Rossby waves.
Keywords: intra-seasonal signal; South China Sea; Rossby wave; sea surface height

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MDPI and ACS Style

Wu, X.; Xie, Q.; He, Z.; Wang, D. Free and Forced Rossby Waves in the Western South China Sea Inferred from Jason-1 Satellite Altimetry Data. Sensors 2008, 8, 3633-3642.

AMA Style

Wu X, Xie Q, He Z, Wang D. Free and Forced Rossby Waves in the Western South China Sea Inferred from Jason-1 Satellite Altimetry Data. Sensors. 2008; 8(6):3633-3642.

Chicago/Turabian Style

Wu, Xiangyu; Xie, Qiang; He, Zhigang; Wang, Dongxiao. 2008. "Free and Forced Rossby Waves in the Western South China Sea Inferred from Jason-1 Satellite Altimetry Data." Sensors 8, no. 6: 3633-3642.

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