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Today, human society faces global warming and its subsequent challenges. The ocean, as one important supporting component of the earth's life system, plays a vital role in realizing the goal of sustainable development of human society. As the birthplace of the heat engine of the earth's climate system, the Indo-Pacific convergence region plays a decisive role in modulating the distribution of earth heat and climate change and has been the focus of international ocean and climate observation projects. This study aims to summarize the achievements and challenges in the international observation projects in the Indo-Pacific convergence region since the last century. Through a detailed literature investigation, the achievements and substantial progress achieved in the Indo-Pacific convergence region international ocean circulation and climate projects are further quantified under the strategy of Marine Power of China since the "12th Five-Year Plan", including the leadership of China in this area and solid scientific research output. Based on the recent 10-year experience in international cooperation and field expeditions in the Indo-Pacific convergence region, we propose a framework for future international cooperation through enhancing multi-sphere and multidisciplinary investigations, which can well support sustainable global development, tackle the climate change, and highlight the top-level design and leadership of China in fulfilling the goal. [ABSTRACT FROM AUTHOR]

Long-distance drifting of seaweeds driven by ocean currents is an ideal model for exploring population-level genetic connectivity and phylogeographic structure. In the Indo-Pacific convergence region, we integrated phylogeographic and ocean current data and Lagrangian particle simulations to explore how the ocean currents contributed to the biogeographical patterns and population genetic connectivity of Sargassum polycystum. The oceanographic transport and direction of gene flow was in line with contemporary ocean currents. The S. polycystum geographical dispersal from glacial refugia homogenized the footprint of genetic divergence. The multidisciplinary intersection provides insights into the evolutionary history and biogeographic conservation of tropical seaweeds in the Indo-Pacific convergence region.