黑潮延伸体海域典型涡旋的次中尺度特征分析*

doi:10.11978/2020152

热带海洋学报 ›› 2021, Vol. 40 ›› Issue (6): 31-40.doi: 10.11978/2020152CSTR: 32234.14.2020152

黑潮延伸体海域典型涡旋的次中尺度特征分析^*

张旭^1,²(), 经志友¹(), 郑瑞玺^1,², 黄小龙^1,², 曹海锦³

1.热带海洋环境国家重点实验室(中国科学院南海海洋研究所), 广东广州 510301
2.中国科学院大学, 北京 100049
3.河海大学海洋学院, 江苏南京 210098

收稿日期:2020-12-26 修回日期:2021-03-01 出版日期:2021-11-10 发布日期:2021-03-03
通讯作者: 经志友
作者简介:张旭(1995—), 男, 河南省周口市人, 硕士研究生, 主要从事上层海洋次中尺度过程研究。email: zhangxu184@mails.ucas.ac.cn
基金资助:
中国科学院基础前沿科学研究计划原始创新项目(ZDBS-LY-DQC011);国家自然科学基金项目(92058201);国家自然科学基金项目(41776040);中国科学院南海生态环境工程创新研究院自主部署项目(ISEE2018PY05)

Submesoscale characteristics of a typical anticyclonic mesoscale eddy in Kuroshio Extension^*

ZHANG Xu^1,²(), JING Zhiyou¹(), ZHENG Ruixi^1,², HUANG Xiaolong^1,², CAO Haijin³

1. State Key Laboratory of Tropical Oceanography (South China Sea Institute of Oceanology, Chinese Academy of Sciences), Guangzhou 510301, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
3. College of Oceanography, Hohai University, Nanjing 210098, China

Received:2020-12-26 Revised:2021-03-01 Online:2021-11-10 Published:2021-03-03
Contact: JING Zhiyou
Supported by:
Original Innovation Project of Basic Frontier Scientific Research Program of CAS(ZDBS-LY-DQC011);National Natural Science Foundation of China(92058201);National Natural Science Foundation of China(41776040);Innovation Academy of South China Sea Ecology and Environmental Engineering, CAS(ISEE2018PY05)

摘要/Abstract

摘要：

本文基于卫星遥感资料和高分辨率ROMS(Regional Ocean Modeling System)数值模拟结果, 对黑潮延伸体海域典型中尺度涡旋的次中尺度特征进行了探讨。卫星观测和模拟结果显示, 黑潮延伸体涡旋海域伴随着活跃的次中尺度现象。涡旋演变与多尺度能量分析结果表明, 涡旋海域次中尺度动能的强弱与涡旋海域地转流动能有着密切联系, 锋生可能是涡旋边缘次中尺度动能增强的重要机制。次中尺度现象在中尺度涡旋海域具有沿地转流方向的复杂涡丝状结构特征, 意味着涡旋边缘较强的水平浮力梯度和地转流侧向剪切为次中尺度过程形成与发展提供了有利条件。此外, 垂向结构分析表明, 次中尺度过程能引起较大的垂向速度, 最大可达100m·day^-1, 该垂向速度可以影响至混合层下200m深度处, 对海洋内部的垂向物质能量交换、海—气相互作用等有着重要的影响。

关键词: 中尺度涡旋, 次中尺度过程, 锋面, 黑潮延伸体

Abstract:

Using satellite measurements and high-resolution ROMS simulations, we analyze submesoscale characteristics of a typical anticyclonic mesoscale eddy in the Kuroshio Extension. Both satellite observations and high-resolution simulations show obvious submesoscale phenomena in the vortex region in the Kuroshio Extension. Our analysis results show that the strength of submesoscale kinetic energy is in close connection with kinetic energy of geostrophic velocity, which means that the frontogenesis may be an important way to enhance the submesoscale kinetic energy in the eddy periphery. Our analysis of the eddy’s vertical constructure shows submesoscale process can induce strong vertical velocity, which can be up to 100 m·day^-1. The strong vertical velocity can reach a depth of hundreds of meters, indicating that submesoscale process can provide an efficient way for sea surface-internal material exchanging and air-sea interactions.

Key words: mesoscale eddy, submesoscale process, front, Kuroshio Extension

中图分类号:

P731.2

张旭, 经志友, 郑瑞玺, 黄小龙, 曹海锦. 黑潮延伸体海域典型涡旋的次中尺度特征分析^*[J]. 热带海洋学报, 2021, 40(6): 31-40.

ZHANG Xu, JING Zhiyou, ZHENG Ruixi, HUANG Xiaolong, CAO Haijin. Submesoscale characteristics of a typical anticyclonic mesoscale eddy in Kuroshio Extension^*[J]. Journal of Tropical Oceanography, 2021, 40(6): 31-40.

图/表 9

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黑潮延伸体海域典型涡旋的次中尺度特征分析^*

Submesoscale characteristics of a typical anticyclonic mesoscale eddy in Kuroshio Extension^*

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黑潮延伸体海域典型涡旋的次中尺度特征分析*

Submesoscale characteristics of a typical anticyclonic mesoscale eddy in Kuroshio Extension*

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黑潮延伸体海域典型涡旋的次中尺度特征分析^*

Submesoscale characteristics of a typical anticyclonic mesoscale eddy in Kuroshio Extension^*