Real-time internal structure construction of mesoscale eddy based on gradient-dependent OI method in the Kuroshio-Oyashio confluence region

Zhang Mengli; Zhang Chunling; Fan Jiahui; Chuang Ziwei

doi:10.12284/hyxb2024105

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Zhang Mengli，Zhang Chunling，Fan Jiahui, et al. Real-time internal structure construction of mesoscale eddy based on gradient-dependent OI method in the Kuroshio-Oyashio confluence region[J]. Haiyang Xuebao，2024, 46(10)：1–12 doi: 10.12284/hyxb2024105

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Real-time internal structure construction of mesoscale eddy based on gradient-dependent OI method in the Kuroshio-Oyashio confluence region

doi: 10.12284/hyxb2024105

1.
College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai 201306, China
2.
Key Laboratory of Marine Ecological Monitoring and Remediation Technology, Ministry of Natural Resources, Shanghai 200125, China

Received Date: 2024-05-15
Rev Recd Date: 2024-08-13

Available Online: 2024-09-30

Abstract

Abstract

The real-time changes of the internal water structure accompanied by the evolution of eddies have always been one of the important influencing factors to further study the ecological effects of mesoscale eddies. Based on satellite altimeter and Argo profile data, the gradient-dependent optimal interpolation method is used to construct the real-time internal structures of eddies. The reliability and effectiveness of this method in constructing the real-time structures of eddies are systematically evaluated through comparison with satellite observation, in-situ data and numerical simulation data. The results show that the orders of magnitude for the reconstructed velocity of three eddies are consistent with satellite altimetry. Compared with the in-situ data of the ADCP (Acoustic Doppler Current Profiler, ADCP), it is found that the locations of the eddy centers are coincident with the velocity turning position of the ADCP observed sections. The fluctuation shapes and amplitudes of the isodensity lines of the three eddies are consistent with the XCTD (Expendable Conductivity-Temperature-Depth, XCTD) observations. In addition, the eddy center and mean radius of the numerical output are basically consistent with the constructed ones. Therefore, the gradient-dependent OI was a hopeful technique for representing the real-time internal features during eddy evolution.
- real-time internal structure,
- mesoscale eddy,
- gradient-dependent optimal interpolation,
- internal structure

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References(27)

References

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