Abstract
The southwest Indian Ocean is an important area for deep-sea investigation and exploration. In this paper, the spatial distribution and temporal variation characteristics of wave elements in the sea area were analyzed by using the high resolution reanalysis data (ERA) from the European Center, the optimal path set of tropical cyclones provided by the Joint Warning Center (JTWC) and the global ocean circulation model (OFES). The results show that the monthly mean effective wave height in the southwest Indian Ocean is relatively large, ranging from 3.5m to 5.5m. the wave season is relatively stable, with the highest mean wave height in winter and the lowest mean wave height in summer; The frequency of tropical cyclones is higher in summer and autumn and lower in winter; The most suitable operation time of manned submersible in the southwest Indian Ocean is from November to march of the next year, and other time needs to select good sea conditions for operation.
Highlights
The Southwest Indian Ridge is a hot area of earth science research, which is the boundary between the Antarctic plate and the African plate
In 2011, China signed a contract with the International Seabed Authority (ISA) for the middle part of the southwest Indian ridge (49°-53°S) The international seabed polymetallic sulfide exploration contract covers an area of about 10000 square kilometers
About one third of the ocean scientific research voyages organized by China have been to the southwest Indian Ocean, and manned submersibles have been used for many times to carry out near bottom highprecision sampling and measurement, which is of great significance for the study of metallogenic mechanism, biodiversity, hydrothermal microbial life process and gene resource potential of polymetallic sulfide in ultra slow spreading ridge [2]
Summary
The Southwest Indian Ridge is a hot area of earth science research, which is the boundary between the Antarctic plate and the African plate It is an ideal place for understanding the lithospheric growth model of the ultra-slow spreading oceanic ridge, improving the mantle upwelling model and hydrothermal circulation mechanism [1]. About one third of the ocean scientific research voyages organized by China have been to the southwest Indian Ocean, and manned submersibles have been used for many times to carry out near bottom highprecision sampling and measurement, which is of great significance for the study of metallogenic mechanism, biodiversity, hydrothermal microbial life process and gene resource potential of polymetallic sulfide in ultra slow spreading ridge [2]. In order to ensure the safety of submarine operation at sea and improve the frequency and efficiency of submergence during the voyage, this paper uses the synoptic analysis method to collect and analyze the data products of marine environment, analyzes and summarizes the characteristics of wind, wave, current, extreme sea conditions and other elements in the southwest Indian Ocean, so as to provide auxiliary decision-making information for selecting a reasonable operation window of deep submersibles and ensuring the operation safety
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
