%0 Journal Article
%T Free and Forced Rossby Waves in the Western South China Sea Inferred from Jason-1 Satellite Altimetry Data
%A Xiangyu Wu
%A Qiang Xie
%A Zhigang He
%A Dongxiao Wang
%J Sensors
%D 2008
%I MDPI AG
%X 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 109.5   oE -115   oE and 12   oN -13.5   oN). Lag correlation of SSH anomaly suggests that the westward propagating signals are free Rossby waves.
%K intra-seasonal signal
%K South China Sea
%K Rossby wave
%K sea surface height
%U http://www.mdpi.com/1424-8220/8/6/3633/