Study of global ocean wave characteristics based on spaceborne SAR image cross-spectrum

Li Huimin; He Yijun; Wang Chen; Lin Wenming; Yang Jingsong

doi:10.12284/hyxb2023040

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Li Huimin，He Yijun，Wang Chen, et al. Study of global ocean wave characteristics based on spaceborne SAR image cross-spectrum[J]. Haiyang Xuebao，2024, 46(3)：1–7 doi: 10.12284/hyxb2023040

Citation:

Li Huimin，He Yijun，Wang Chen, et al. Study of global ocean wave characteristics based on spaceborne SAR image cross-spectrum[J]. Haiyang Xuebao，2024, 46(3)：1–7 doi: 10.12284/hyxb2023040

Citation:

Li Huimin，He Yijun，Wang Chen, et al. Study of global ocean wave characteristics based on spaceborne SAR image cross-spectrum[J]. Haiyang Xuebao，2024, 46(3)：1–7 doi: 10.12284/hyxb2023040

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Study of global ocean wave characteristics based on spaceborne SAR image cross-spectrum

doi: 10.12284/hyxb2023040

Li Huimin^{1, 2
,},
He Yijun^{1, 2
,
,},
Wang Chen^{1, 2},
Lin Wenming^{1, 2},
Yang Jingsong³

1.
School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing 210044, China
2.
Key Laboratory of Space Ocean Remote Sensing and Application, Ministry of Natural Resources, Beijing 100081, China
3.
State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China

Received Date: 2023-08-03
Rev Recd Date: 2023-12-19

Available Online: 2022-11-14

Abstract

Abstract

Spaceborne synthetic aperture radar (SAR) is able to collect observations under all kinds of weather during day and night. Such measurements have been proven to provide significant data support for the ocean dynamics study. While SAR imaging of ocean waves is a highly nonlinear process, leading the wave signal missing along the azimuth direction. The image cross-spectrum provides a way to help investigate the ocean wave features particularly for their propagation direction. In this study, we extended a recently defined parameter based on SAR image cross-spectrum and analyzed the correlation of different wave scales with the local wind speed. The range peak wavenumber (wavelength) extracted from the range spectral profile is also demonstrated at the global scale based on about 4 million SAR images. It is found that this new spectral parameter could to some extent reflect the coupling between wind and waves. The global pattern of range peak wavenumber also illustrates evident seasonality.
- spaceborne synthetic aperture radar,
- ENVIronment SATellite/Advanced SAR (Envisat/ASAR),
- image cross-spectrum,
- wind-wave coupling

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References(17)

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