Low frequency variability of South China Sea surface circulation from 11 years of satellite altimeter data

Details Low frequency variability of South China Sea surface circulation from 11 years of satellite altimeter data Low frequency variability of South China Sea surface circulation from 11 years of satellite altimeter data

Nov 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3322612f&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 22, CiteID L22612

Physics

6

Oceanography: General: Descriptive And Regional Oceanography, Oceanography: General: Marginal And Semi-Enclosed Seas, Oceanography: Physical: Sea Level: Variations And Mean (1222, 1225, 1641), Oceanography: Physical: Upper Ocean And Mixed Layer Processes

Scientific paper

Eleven years of sea surface height from satellite altimetry data are used to describe the low frequency variability of South China Sea (SCS) surface circulation through Empirical Orthogonal Function (EOF) analysis. The annual variability clearly agrees with previous studies, revealing the SCS response to seasonal fluctuations of the overlaying monsoon winds. The summer eastward jet off west coast of SCS is shown from the second seasonal EOF mode. Two new patterns of year-to-year and decadal variability are presented for the first time from measurements. Long term positive trend appears from 1993 to 2001 and reverses the sign of its trend again from 2001 to 2003. Abnormal events occur in 1994-1995, in 1997-1998 and in 2002 with different spatial scales regarding both basin-scale distribution and meso-scale variability located off the western SCS. Association of these events with the El Niño-Southern Oscillation is discussed.

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