Free-dropping acoustic Doppler current profiler observation and data processing

Mou Yong; Liang Chujin; Lin Feilong; Cui Zijian

doi:10.12284/hyxb2023047

Volume 45 Issue 4

Mar. 2023

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Mou Yong，Liang Chujin，Lin Feilong, et al. Free-dropping acoustic Doppler current profiler observation and data processing[J]. Haiyang Xuebao，2023, 45(4)：144–153 doi: 10.12284/hyxb2023047

Citation:

Mou Yong，Liang Chujin，Lin Feilong, et al. Free-dropping acoustic Doppler current profiler observation and data processing[J]. Haiyang Xuebao，2023, 45(4)：144–153 doi: 10.12284/hyxb2023047

Citation:

Mou Yong，Liang Chujin，Lin Feilong, et al. Free-dropping acoustic Doppler current profiler observation and data processing[J]. Haiyang Xuebao，2023, 45(4)：144–153 doi: 10.12284/hyxb2023047

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Free-dropping acoustic Doppler current profiler observation and data processing

doi: 10.12284/hyxb2023047

Mou Yong^1
,,
Liang Chujin^{1, 2, 3
,
,},
Lin Feilong¹,
Cui Zijian³

1.
State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
2.
School of Ocean Science, Nanjing University of Information and Technology, Nanjing 210044, China
3.
School of Ocean Science, Zhejiang University, Hangzhou 310058, China

Received Date: 2022-09-14
Rev Recd Date: 2022-10-25

Available Online: 2023-04-13

Publish Date: 2023-03-31

Abstract

Abstract

The free-dropping acoustic Doppler current profile (FADCP) samples in a “free-fall” manner, which can observe the full depth current without relying on the cable traction of the ship, and its stability is greatly improved compared with lowered acoustic doppler current profiler (LADCP), effectively reducing the irregular motion in the observations. The FADCP observation experiments conducted in April and September 2021 at Xisha waters in the South China Sea obtained current and CTD data from two sections containing 16 stations. Based on the real bottom current observation during the resting period, the full-depth current profiles at each station were obtained by shear method, and the average deviation of the station profile near a mooring compared with the mooring profile was 3 cm/s. The observation section captured the cyclonic eddies of two periods at Xisha waters with more precise vertical structures than the HYCOM simulation, and the surface flows fitted with the absolute geostrophic currents. This research shows that the FADCP has low vessel requirements, high data quality, easy post-processing and good results, but cannot perform supplementary observations for specific water layers.
- FADCP,
- LADCP,
- shear method

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References(13)

References

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