The Indo-Pacific Convergence Zone (IPCZ) has a complex ocean dynamical system. All scale processes are active and interplay from small-scale turbulent mixing to basin-scale circulation. The IPCZ acts as an “oceanic bridge” for the inter-basin mass transports and basin-scale planetary waves, closely linking basin-scale circulations in the Pacific and Indian Oceans. Numerous straits in the Indonesian Seas provide oceanic channels for planetary waves propagating between the tropical Pacific and the southeast Indian Ocean. On a large scale, the inter-basin mass transports and planetary waves change the ocean thermal structure, triggering strong air-sea interactions, and further regulating the variability of Walker and Hadley Circulations. The latter form an “atmospheric bridge”, which significantly affects the Asian and Australian monsoon systems and a series of global climate events like El Niño-Southern Oscillation (ENSO), Indian Ocean Dipole, and Indian Ocean Basinwide warming. On meso- and small- scales, eddy, submesoscale processes, and turbulent motions mix the water mass from different sources, dramatically stirring the upper ocean in the IPCZ.

Ocean dynamics have essential impacts on the ecological system in the IPCZ. On the one hand, these processes directly affect biodiversity by controlling the genetic exchanges and species dispersals between basins. On the other hand, the ocean dynamical processes influence biogeochemical cycling by controlling the trophic transfer, which further impacts primary productivity. With the intensified climate variations under global warming, e.g., marine heatwaves and extreme events, the ocean dynamical processes turn more active and enhance the influence on the ecosystem. This work overviews a series of studies focusing on the multi-scale ocean dynamical and environmental processes in the IPCZ, including the climatic signatures in coral records and the ecological response.

印太融合区 (IPCZ) 具有复杂的海洋动力系统。从小规模湍流混合到盆地规模循环，所有规模过程都是活跃的和相互作用的。IPCZ作为跨流域质量输运和流域尺度行星波的“大洋桥”，将太平洋和印度洋流域尺度环流紧密联系起来。印度尼西亚海域的众多海峡为在热带太平洋和东南印度洋之间传播的行星波提供了海洋通道。在大范围内，流域间物质传输和行星波改变了海洋热结构，引发了强烈的海气相互作用，进一步调节了沃克环流和哈德莱环流的变化。后者形成“大气桥”，对亚澳季风系统和厄尔尼诺-南方涛动（ENSO）、印度洋偶极子、印度洋盆地变暖等一系列全球气候事件产生重大影响。在中尺度和小尺度上，涡流、亚尺度过程和湍流运动混合了来自不同来源的水团，极大地搅动了 IPCZ 的上层海洋。

海洋动力学对 IPCZ 的生态系统具有重要影响。一方面，这些过程通过控制流域间的遗传交换和物种扩散直接影响生物多样性。另一方面，海洋动力过程通过控制营养转移影响生物地球化学循环，进而影响初级生产力。随着全球变暖背景下气候变化的加剧，如海洋热浪和极端事件等，海洋动力过程变得更加活跃，并增强了对生态系统的影响。这项工作概述了一系列关注 IPCZ 多尺度海洋动力和环境过程的研究，包括珊瑚记录中的气候特征和生态响应。