李浩民,李成

• 1:广东海洋大学海洋与气象学院/近海海洋变化与灾害预警实验室
• 2:广东省高等学校陆架及深远海气候资源与环境重点实验室
• 3:自然资源部空间海洋遥感与应用重点实验室

摘要(Abstract)：

【目的】西南太平洋中尺度涡旋过程十分活跃，其涡动能占据海洋中绝大部分能量，本研究探究该海域涡动能时空变异的调控机制。【方法】从原始能量方程出发，基于1991―2017年ECCO2数据和1993―2018年SLA数据进行涡动能（EKE）时空变异分析，包括EKE的季节变化分析和年际变化分析。【结果和结论】季节变化分析中，发现该海域EKE水平分布在12―3月份呈现低值、垂向影响深度较浅，而6―8月份的水平分布呈现高值、垂向影响深度较深。将西南太平洋EKE高值区域划分为3个区域，即A区域（150°―160°E/28°―36°S）,B区域（150°―160°E/28°―32°S）与C区域（150°―160°E/32°―36°S）。从能量方程出发，对于EKE和正压转换、斜压转换以及对风应力做功进行相关分析。基于EKE季节变异与影响因素的超前-滞后的相关性分析，发现BT是EKE季节变化的主要调控因子，其中，A、C区域分别有0.70和0.58的相关度滞后BT 1个月，B区域有0.53相关度与BT同期变化。针对EKE的年际变化，进行Nino3.4指数、南半球环状模指数以及水平流速垂向剪切信号与EKE年际变化信号的超前滞后相关分析，发现EKE年际变化有0.57的正相关度滞后6个月于Nino3.4指数变化，表明厄尔尼诺事件是该海域EKE年际变化的主要调控因素，而流速剪切信号在二者中起到桥梁作用。

关键词(KeyWords)： 西南太平洋;中尺度涡旋;能量方程;涡动能;时空变异

Abstract:

Keywords:

基金项目(Foundation): 广东海洋大学科研启动经费资助项目（R19011）;; 广东省普通高校创新团队项目（2019KCXTF021）;; 广东省冲一流专项资金项目（080503032101,231420003）

作者(Author): 李浩民,李成

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