Basis functions for shallow-water temperature profiles based on the internal-wave eigenmodes

Qianqian Li; Shoulian Cao; Yu Luo; Kai Zhang; Fanlin Yang

doi:10.1007/s13131-022-2072-7

Volume 42 Issue 2

Feb. 2023

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Article Navigation > Acta Oceanologica Sinica > 2023 > 42(2): 56-64

Qianqian Li, Shoulian Cao, Yu Luo, Kai Zhang, Fanlin Yang. Basis functions for shallow-water temperature profiles based on the internal-wave eigenmodes[J]. Acta Oceanologica Sinica, 2023, 42(2): 56-64. doi: 10.1007/s13131-022-2072-7

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Qianqian Li, Shoulian Cao, Yu Luo, Kai Zhang, Fanlin Yang. Basis functions for shallow-water temperature profiles based on the internal-wave eigenmodes[J]. Acta Oceanologica Sinica, 2023, 42(2): 56-64. doi: 10.1007/s13131-022-2072-7

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Basis functions for shallow-water temperature profiles based on the internal-wave eigenmodes

doi: 10.1007/s13131-022-2072-7

Qianqian Li^{1, 2, 3},
Shoulian Cao¹,
Yu Luo^{1
,
,},
Kai Zhang¹,
Fanlin Yang¹

1.
College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao 266590, China
2.
State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China
3.
College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China

Funds: The Natural Science Foundation of Shandong Province of China under contract Nos ZR2022MA051 and ZR2020MA090; the Fund of China Postdoctoral Science Foundation under contract No. 2020M670891; the Shandong University of Science and Technology Research Fund under contract No. 2019TDJH103; the Talent Introduction Plan for Youth Innovation Team in Universities of Shandong Province (Innovation Team of Satellite Positioning and Navigation).

More Information

Corresponding author: E-mail: luoyu@sdust.edu.cn
Received Date: 2022-02-18
Accepted Date: 2022-05-01

Available Online: 2022-10-28

Publish Date: 2023-02-25

Abstract

Abstract

The shallow-water temperature profile is typically parameterized using a few empirical orthogonal function (EOF) coefficients. However, when the experimental area is poorly known or highly variable, the adaptability of the EOFs will be significantly reduced. In this study, a new set of basis functions, generated by combining the internal-wave eigenmodes with the average temperature gradient, is developed for characterizing the temperature perturbations. Temperature profiles recorded by a thermistor chain in the South China Sea in 2015 are processed and analyzed. Compared to the EOFs, the new set of basis functions has higher reconstruction accuracy and adaptability; it is also more stable in ocean regions that have internal waves.
- temperature profile,
- basis function,
- internal-wave eigenmode,
- EOF,
- sound speed profile

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References

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