【摘要】 利用多卫星平台和Argo浮标观测资料,分析研究了2004年台风婷婷(Tingting)引起海洋上层温盐结构和叶绿素a浓度的时空变化特征.结果发现,台风婷婷过境时沿着其路径诱发强烈的上升流,混合层内海水混合加剧,冷涡加强,出现了大范围的海表温度降低和叶绿素a增加现象.台风前的冷涡区域,出现大面积的"冷斑"和"藻华带",且维持时间更长;而在台风前的暖涡区域内,则生物物理响应不明显.因此,先前的海洋环境对于台风引起的上层生物物理响应具有重要意义.更多还原

【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(0.08~0.15 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.更多还原