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WANG Fan, WANG Jianing, XU Lijun, ZHANG Xiangguang, YAN Shefeng, CHEN Yonghua. The development of a new real-time subsurface mooring[J]. Journal of Oceanology and Limnology, 2020, 38(4): 1080-1091

The development of a new real-time subsurface mooring

WANG Fan1,2,4, WANG Jianing1,2,4, XU Lijun3,4, ZHANG Xiangguang1,2,4, YAN Shefeng3,4, CHEN Yonghua1,2,4
1 Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China;
2 Laboratory for Ocean and Climate Dynamics, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266000, China;
3 Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China;
4 University of Chinese Academy of Sciences, Beijing 100049, China
Subsurface mooring allows researchers to measure the ocean properties such as water temperature, salinity, and velocity at several depths of the water column for a long period. Traditional subsurface mooring can release data only after recovered, which constrains the usage of the subsurface and deep layer data in the ocean and climate predictions. Recently, we developed a new real-time subsurface mooring (RTSM). Velocity profiles over upper 1 000 m depth and layered data from sensors up to 5 000 m depth can be realtime transmitted to the small surface buoy through underwater acoustic communication and then to the office through Beidou or Iridium satellite. To verify and refine their design and data transmission process, we deployed more than 30 sets of RTSMs in the western Pacific to do a 1-year continuous run during 2016-2018. The continuous running period of RTSM in a 1-year cycle can reach more than 260 days on average, and more than 95% of observed data can be successfully transmitted back to the office. Compared to the widely-used inductive coupling communication, wireless acoustic communication has been shown more applicable to the underwater sensor network with large depth intervals and long transmission distance to the surface.
Key words:    real-time subsurface mooring|underwater acoustic communication|Western Pacific|ocean and climate predictions   
Received: 2020-04-02   Revised: 2020-04-26
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