Temporal and Spatial Variation of Vortex at Northeast Taiwan from 1992 to 2009

Using the satellite altimetric sea level data during 1992 to 2009 from AVISO, analyzed seasonal, annual variations of vortexes in northeast Taiwan (24°N ~ 27°N, 120°E ~ 124°E). The result shows that: (1) Cyclonic and anti-cyclonic eddies are found in research area and had significant seasonal variation; (2) Cyclonic eddies had five-years cycle in winter; (3) Cyclonic eddies and anti-cyclonic eddies often appeared in pairs and swing in the east-west direction simultaneously; (4) Changes in spatial distribution of the eddies are the result from the Kuroshio’s period oscillation and the topography at northeast of Taiwan.