A synthetic autonomous profiling float array in a Lagrangian particle tracking system

Tianyu Wang; Zenghong Liu; Yan Du

doi:10.1007/s13131-024-2395-7

Volume 42 Issue 12

Dec. 2024

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Tianyu Wang, Zenghong Liu, Yan Du. A synthetic autonomous profiling float array in a Lagrangian particle tracking system[J]. Acta Oceanologica Sinica, 2024, 43(12): 34-46. doi: 10.1007/s13131-024-2395-7

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Tianyu Wang, Zenghong Liu, Yan Du. A synthetic autonomous profiling float array in a Lagrangian particle tracking system[J]. Acta Oceanologica Sinica, 2024, 43(12): 34-46. doi: 10.1007/s13131-024-2395-7

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A synthetic autonomous profiling float array in a Lagrangian particle tracking system

doi: 10.1007/s13131-024-2395-7

Tianyu Wang^{1, 2},
Zenghong Liu^{3, 4
,
,},
Yan Du^{1, 2}

1.
State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
4.
Observation and Research Station of Global Ocean Argo System (Hangzhou), Ministry of Natural Resources, Hangzhou 310012, China

Funds: The National Natural Science Foundation of China under contract Nos 42106022 and 42106024; the National Key Research and Development Program of China under contract No. 2021YFC3101502; the Fund of Laoshan Laboratory under contract No. LSKJ202201500; the Fund of Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) under contract No. SML2021SP102; the Fund of Chinese Academy of Sciences under contract Nos 133244KYSB20190031, 183311KYSB20200015, and SCSIO202201.

More Information

Corresponding author: E-mail: zliu@sio.org.cn;duyan@scsio.ac.cn
Received Date: 2024-06-19
Accepted Date: 2024-09-12
Rev Recd Date: 2024-09-12

Available Online: 2025-01-11

Publish Date: 2024-12-01

Abstract

Abstract

Over the past two decades, numerous countries have actively participated in the International Argo Program, working toward the global “OneArgo” goal. China’s Argo program has deployed over 500 autonomous profiling floats in the Indo-Pacific, with 55 Beidou (BD) floats, equipped with the Beidou satellite communication system, currently operational. During the operation of the BD float network, we found that in addition to the limitation of floats battery, the loss may also be caused by communication loss due to the floats escaping from the Beidou-2’s short message coverage. In this study, float trajectories are simulated using velocity fields from an eddy-resolved resolution Estimating the Circulation and Climate of the Ocean, Phase Ⅱ (ECCO2) model and a Lagrangian particle tracking model programmed to represent the vertical motions of profiling floats. The simulations can help to explore both the representativeness and the predictability of profiling float displacements. By deploying a large number of synthetic floats in the Lagrangian particle tracking system, we construct probability density functions (PDFs) of the simulated-float trajectory among key oceans, for example, a joint region of East Indian−South China Sea−Northwest Pacific Ocean (5°–40°N, 70°–140°E), which is generally similar to the location of the present BD float network. These statistics can help to estimate the chance of floats drifting into shallow seas (such as the East China Sea) and out of the coverage of the Beidou satellite communication. With this knowledge changes to the future China’s Argo observing system could be made.
- Lagrangian particles,
- autonomous profiling float array,
- trajectory simulation,
- probability density functions

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References(34)

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