Statistical analysis of the features of meso-scale eddies near the Luzon Strait
16 years (1993 - 2008) of merged sea level anomaly (MSLA) data obtained from Archiving, Val-idation and Interpretation of Satellite Oceanographic data (AVISO) are used to track the trajectories of me-so-scale eddies near the Luzon Strait (LS) (18° -23°N ,116°-126°E), and the results indicate that it is difficult to observe meso-scale eddies from the northwestern Pacific propagating into the South China Sea (SCS) through the LS based on the data with the temporal resolution of 7 d. The analysis on one cyclonic eddy observed in the middle of the LS in 1994, suggests that the sea level anomaly from the Northwestern Pacific propagates into the SCS through the LS after coupling with the original signal in the LS. The time-longitude diagram implies that the sea level anomaly signals become discontinuous near the LS (121°- 122°E) when they propagate westward. After applying the band-pass filter to the sea level anomaly data in the section 21°N, 116° -140°E with the periods of 1 - 3 month, 3 - 6 month and 330 - 390 d, one can conclude that the signals from the Northwestern Pacific propagating into the SCS through the LS get different blocked, have different westward propagation velocity and have different forcing mechanisms for different period bands.
Luzon Straitmeso-scale eddiessatellite altimeter data
NETL
NSTL
万方数据
维普
