時間：2016年9月26日（星期一），11:40-13:30（12:20開始講座）

地點：周隆泉樓A3-206

講座摘要：

Subtropical fronts are key regions in the world’s oceans as they provide the connection between the dynamically and biogeochemically different subpolar and subtropical oceans. Understanding the mechanisms that modulate the exchange of properties between these regions is not only locally important but may also help explain long-term changes that affect the climate system and may be sensitive to such exchanges. In this study, focus is given to the importance of submesoscale processes in triggering phytoplankton blooms at the subtropical front in the South Atlantic Ocean. A basin-wide model configuration is nested with a higher resolution domain within the frontal region in order to study the exchange of physical properties as well biologically active tracers. On average, a stronger zonal baroclinic jet is observed in the high-resolution domain. Frontal instabilities generated by imbalances in the thermal wind induce rapid changes in the mixed layer depth and generates more episodic blooms with slightly larger biomass during periods when surface stratification is increased. Nonlinearities associated with the Ekman dynamics seem to be responsible for the generation of large vertical velocities and are more important in the high-resolution domain because of larger gradients in relative vorticity.

報名方式：

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本講座將發布當天僅開放給科研人員、技術人員、博士后、訪問學者等教師優先報名，第二天起開放給全體師生報名。學生應在規定時間內報名，如提前以教師的名義報名，將導致報名無效。

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