王同宇,张书文,马永贵,陈法锦,蒋晨,于杰

• 1:广东省近海海洋变化与灾害预警重点实验室/广东海洋大学海洋与气象学院
• 2:区域海洋动力学与数值模拟功能实验室/海洋科学与技术国家实验室

摘要(Abstract)：

【目的】研究黑潮延伸体区域内的涡旋活动对浮游植物繁殖的影响。【方法】根据高分辨率的卫星遥感和再分析资料,对李亚诺夫指数(FSLE)、海表面温度(SST)、海表面高度异常(SLA)、叶绿素(Chl-a)浓度进行归一化合成分析,并计算气旋式涡旋内混合层厚度(MLD)以及引起的埃克曼抽吸速率。【结果与结论】黑潮延伸体区域内的气旋式涡旋引起的埃克曼抽吸作用和冬季混合是Chl-a浓度升高的主要驱动机制。周期为44周的涡旋在16～23周(春季)期间Chl-a浓度高于同期背景场,最大Chl-a浓度是周围的3倍。冬季强湍流混合和涡-风导致的埃克曼抽吸作用使得混合层深度加深至由埃克曼抽吸主导营养盐输送的跃层深度,结合涡致埃克曼抽吸,有利于携带跃层内更多的营养盐输送至混合层,配合春季充足的光照条件,则会更进一步促进浮游植物繁殖。长时间的闭合拉格朗日拟序结构,对于维持高浓度Chl-a有一定的作用。

关键词(KeyWords)： 黑潮延伸区;气旋式涡旋;浮游植物繁殖;混合层;埃克曼抽吸

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划重点专项(2016YFC1401403);; 国家自然科学基金面上项目(41676008和41876005);; 国际合作项目(GASI-IPOVI-04);; 广东省自然科学基金(2016A030312004)

作者(Author): 王同宇,张书文,马永贵,陈法锦,蒋晨,于杰

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