王同宇;张书文;蒋晨;刘潇;曾伟强;李韬;

• 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2007—2017年间西北太平洋过境冷涡的11个台风导致浮游植物生长和冷涡(CCE)变化现象。【方法】统计并计算出可能影响叶绿素(Chl-a)浓度变化的因素:台风性质(强度、移动速度、强迫时间)、台风前混合层厚度(MLD)、降雨量、海表面温度(SST)、埃克曼抽吸速率(EPV)和两层约化重力模式下的涡动能(EKE),其中EPV和EKE分别代表上升流和湍流混合强弱。【结果与结论】通过线性回归分析发现,除台风强度、SST与Chl-a浓度相关性不显著(P>0.05),移动速度Uh、强迫时间、降雨和MLD、EPV、EKE与Chl-a均有显著相关性(P<0.05),并建立了冷涡背景条件下的多元线性回归模型:?=0.006-0.038 x_1+0.0257x_2+0.023 8 x_3。浮游植物生长主要取决于上升流和湍流混合对营养盐的输送作用,慢而尺度大台风意味着受台风强迫时间长,足以超过地球自转调整的时间则会引起强上升流(EPV)以及湍流混合输送营养盐,促进Chl-a浓度大幅度增加,强湍流混合同时也需要降雨抑制,避免破坏浮游植物光合作用,台风前CCE区域MLD(<25m)与Chl-a呈现出正相关。

关键词(KeyWords)： 西北太平洋;台风;冷涡;浮游植物生长;多元线性回归

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(Authors): 王同宇;张书文;蒋晨;刘潇;曾伟强;李韬;

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