The Digital Twins of the Ocean (DTO) is a new generation of virtual systems with marine science at its core and computer technology as its support. As a frontier of international scientific and technological innovation, the DTO aims to use information systems and artificial intelligence technology to serve real scenarios in the marine field. Over the past 10 years, our team has carried out interdisciplinary development and application in the field of digital twins, and has made some progress in application scenarios such as marine engineering, marine environment, and Earth's evolution:
1、We have developed a marine environment DTO for the protection of Hong Kong-Zhuhai-Macao Bridge (HZMB) Island Tunnel project. By organizing, managing, and visualizing real-time monitoring data of the marine physical environment，we have achieved real-time analysis and information decision-making of wind, wave, and current data, providing precise marine environmental forecast information for the construction of the HZMB.
2、We have developed a DTO platform for the marine ecological environment of the coastal waters, achieving the governance of multi-source data such as buoys, ship measurements, and remote sensing data. The DTO is capable of conducting automated or customized water quality assessments, red tide warnings, and oil spill risk alerts，which provides real-time and online computational assessments for coastal tourism areas, marine protected areas, and major marine engineering areas, providing digital demonstration applications for the safety of marine ecological environment and the sustainable development of the marine economy.
3、We have developed a geological digital twin platform, which is currently being developed within the Deep-time Digital Earth (DDE) Big Science Program. This system has initially achieved visualization and analysis of multidimensional geospatial-temporal data such as dynamic simulation of paleo tectonic plates and custom drawing of geological profiles, with the expectation of aiding geoscientists worldwide by coupling data, knowledge, models, and computing power, providing scientific inspiration for geoscientists, and promoting data-driven Earth science research.

digital twins, marine engineering, marine environment, Earth's evolution, real scenarios