Abstract: The biophysical responses of the upper ocean to Typhoon Tingting in 2004 were analyzed using multiplatform satellites and Argo float data. Along Tingtings passages, multiplatform satellite instruments detected an increase in surface chlorophyll concentration (008~015 mg·m-3) and sea surface cooling (4~5 ℃) in the wake. The wind fields intensified the oceanic cyclonic circulation, sea upwelling, surface cooling, and deepened the mixed layer (20~35 m). The mixing and upwelling injected subsurface phytoplankton and nutrients into the surface layer, resulting in two-week-long phytoplankton blooms. The surface cooling and phytoplankton blooms occurred mainly in the pre-existing cyclonic circulation area, but few in the pre-existing anticyclonic circulation area. This work provided convincing evidence that negative sea surface features play important roles in biophysical responses of the upper ocean to typhoons.

Key words: Argo, chlorophyll a, Typhoon Tingting, ocean remote sensing