Physical modulation to the biological productivity in the summer Vietnam upwelling system-猫眼课题宝

DOI：

10.5194/os-14-1303-2018

发表时间：

2018-10

期刊：

Ocean Science

影响因子：

3.2

通讯作者：

中科院分区：

地球科学2区

文献类型：

作者：

Wenfang Lu;L. Oey;Enhui Liao;Zhuang Wei;Xiao‐Hai Yan;Yuwu Jiang

抽象。夏季越南边界上升流的生物生产力南海西部的上升流系统，与许多沿海上升流系统一样，受到风的强烈调制。然而，海洋环流的作用和中尺度涡旋尚未阐明。在这里，我们展示了一个初级生产力和动能之间的时空协变。高生产率与高动能有关，这就解释了生产可变性≤ 15%。的结果物理-生物耦合模型表明，升高的动能是与当前与海岸分离的强度有关。在低生产情景下，流通不仅疲软，而且表现出疲软分居在较高产量的情况下，分离的电流形成向东急流进入南海内陆，再循环捕获养分并有利于生产力。分离时没有，模式显示减弱的环流和涡动活动，硝酸盐库存减少21%，初级生产力较弱。

Abstract. Biological productivity in the summer Vietnam boundary upwelling system in the western South China Sea, as in many coastal upwelling systems, is strongly modulated by wind. However, the role of ocean circulation and mesoscale eddies has not been elucidated. Here, we show a close spatiotemporal covariability between primary production and kinetic energy. High productivity is associated with high kinetic energy, which accounts for ∼15 % of the production variability. Results from a physical–biological coupled model reveal that the elevated kinetic energy is linked to the strength of the current separation from the coast. In the low production scenario, the circulation is not only weaker but also shows weak separation. In the higher production case, the separated current forms an eastward jet into the interior South China Sea, and the associated southern recirculation traps nutrients and favors productivity. When separation is absent, the model shows weakened circulation and eddy activity, with ∼21 % less nitrate inventory and ∼16 % weaker primary productivity.

Physical modulation to the biological productivity in the summer Vietnam upwelling system

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