热带印太洋际交换次表层流速极大值研究概述

魏泽勋; 李明婷; 徐腾飞; 聂珣炜; 李淑江

doi:10.12284/hyxb20250103

热带印太洋际交换次表层流速极大值研究概述

doi: 10.12284/hyxb20250103

1.
自然资源部第一海洋研究所自然资源部海洋环境科学与数值模拟重点实验室，山东青岛 266061
2.
中山大学海洋科学学院，广东珠海 519082

基金项目: 国家自然科学基金重点项目—热带印−太洋际交换次表层流速极大值的维持、变异与气候效应（42430402）。

详细信息

作者简介:
魏泽勋（1970—），男，安徽省巢湖市人，研究员，主要从事潮汐和环流动力学方面研究。E-mail：weizx@fio.org.cn

中图分类号: P731.2
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- 被引次数: 0
出版历程
- 收稿日期: 2025-10-05
- 录用日期: 2025-11-10
- 修回日期: 2025-10-27
- 网络出版日期: 2025-11-11
- 刊出日期: 2025-10-31

An introduction to the subsurface velocity maximum structure of the tropical Indo-Pacific interoceanic water exchange

1.
First Institute of Oceanography, and Key Laboratory of Marine Science and Numerical Modeling, Ministry of Natural Resources, Qingdao 266061, China
2.
School of Marine Science, Sun Yat-Sen University, Zhuhai 519082, China

摘要

摘要: 热带印太洋际交换是大洋热盐环流和全球气候系统的关键环节，是海洋和气候领域的研究热点。观测结果显示，洋际交换具有显著的垂向结构，其流速极大值发生在次表层而不是表层。现有研究对洋际交换垂向结构的维持及变异机制认识不足，也忽视了其对气候的影响。基于自主潜标观测，我们发现源于太平洋西边界流的次表层极大值特征能够进入南海和印尼海并在洋际交换过程中稳定存在，并提出洋际交换海域巨大的淡水和热量通量，以及赤道长波动力过程是洋际交换次表层极大值维持和变异的关键机制这一科学假设。基于上述发现和科学假设，本文梳理了洋际交换次表层极大值的研究现状和存在问题，规划了以观测事实为依据，结合数值模式和理论分析开展洋际交换次表层流速极大值及其气候效应研究的基本思路。研究成果对深入理解热带太平洋−印度洋跨洋盆相互作用和海气相互作用有重要意义，将为提升海洋和气候预测能力提供理论支撑。
- 洋际交换 /
- 印尼贯穿流 /
- 次表层流速极大值 /
- 赤道行星波 /
- 浮力效应
Abstract: The tropical Indo-Pacific interocean water exchange, which serves as a critical link in the oceanic thermohaline circulation and the global climate system, is one of the most hotspot oceanography and climate science. Previous observation show that the interocean exchange exhibits a distinct vertical structure, with its subsurface velocity maximum (SVM) occurring in the subsurface layer rather than the surface layer. However, existing studies have insufficient understanding of the variability of this structure as well as the underlying mechanisms. Meanwhile, the impact of SVM induced heat and freshwater transport on the Indo-Pacific climate is unclear. Based on mooring observed sea water velocity profiles, we have identified that the SVM characteristics originating from the Pacific Western Boundary Currents can propagate into the South China Sea and the Indonesian Seas, and persist along the main route of the Indonesian Throughflow from Makassar to the Lombok Strait. We propose the scientific hypothesis that the substantial freshwater and heat fluxes in the Maritime Continent, along with the propagation of equatorial planetary wave, are the key mechanisms governing the maintenance and variability of the SVM in interoceanic exchange. Here, we tried to propose an approach to investigate the SVM and its climate effect, based on observations, numerical simulations, and theoretical analyses. The research outcomes are of great significance for deepening the understanding of the interactions between the tropical Pacific and Indian Oceans, as well as air-sea interactions, and will provide theoretical support for enhancing the predictability of the Indo-Pacific climate system.
- inter-ocean exchange /
- Indonesian Throughflow /
- subsurface velocity maximum /
- equatorial planetary wave /
- buoyancy effect

HTML全文

图 1 热带印太洋际交换海域地形和主要海洋环流示意图

Fig. 1 Topography and schematic map of ocean circulation in the tropical Indo-Pacific interoceanic water exchange region

下载: 全尺寸图片幻灯片

图 2 基于潜标观测的印尼贯穿流主流次表层流速极大值现象

a. 印尼贯穿流主流示意图及潜标站位（五角星）；b–d. 望加锡海峡（北）、望加锡海峡（南）、龙目海峡沿海峡流速剖面的周年变化；e–g. 望加锡海峡（北）、望加锡海峡（南）、龙目海峡的年平均沿海峡流速剖面。流速正值表示海流方向向北

Fig. 2 Mooring observed subsurface velocity maximum structure along the main route of the Indonesian Throughflow.

a. Main route of the Indonesian Throughflow and mooring sites (pentagrams); b–d. annual cycle of the along strait velocity profiles in the Northern Makassar Strait, Southern Makassar Strait, and Lombok Strait; e–g. Annual mean of the along strait velocity profiles in the Northern Makassar Strait, Southern Makassar Strait, and Lombok Strait. The velocity positive values indicating northward flow

下载: 全尺寸图片幻灯片

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