Investigation on the Doppler shifts induced by 1-D ocean surface wave displacements by the first order small slope approximation theory: comparison of hydrodynamic models

doi:10.1088/1674-1056/19/7/074103

中国物理B ›› 2010, Vol. 19 ›› Issue (7): 74103-074103.doi: 10.1088/1674-1056/19/7/074103

Investigation on the Doppler shifts induced by 1-D ocean surface wave displacements by the first order small slope approximation theory: comparison of hydrodynamic models

张彦敏¹, 王运华², 郭立新³

(1)Department of Physics, Ocean University of China, Qingdao 266100, China; (2)Ocean Remote Sensing Institute, Ocean University of China, Qingdao 266003, China; (3)School of Science, Xidian University, Xi'an 710071, China

修回日期:2009-12-08 出版日期:2010-07-15 发布日期:2010-07-15
基金资助:
Project supported by the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 40906088) and Specialized Research Fund for the Doctoral Program of Higher Education of China.

Investigation on the Doppler shifts induced by 1-D ocean surface wave displacements by the first order small slope approximation theory: comparison of hydrodynamic models

Wang Yun-Hua(王运华)^a), Zhang Yan-Min(张彦敏)^b)†, and Guo Li-Xin(郭立新)^c)

^a Ocean Remote Sensing Institute, Ocean University of China, Qingdao 266003, China; ^b Department of Physics, Ocean University of China, Qingdao 266100, China; ^c School of Science, Xidian University, Xi'an 710071, China

Revised:2009-12-08 Online:2010-07-15 Published:2010-07-15
Supported by:
Project supported by the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 40906088) and Specialized Research Fund for the Doctoral Program of Higher Education of China.

摘要/Abstract

摘要： Based on the first order small slope approximation theory (SSA-I) for oceanic surface electromagnetic scattering, this paper predicts the Doppler shifts induced by wave displacements. Theoretical results from three distinct hydrodynamic models are compared: a linear model, the nonlinear Barrick model, and the nonlinear Creamer model. Meanwhile, the predicted Doppler shifts are also compared with the results associated to the resonant Bragg waves and the so-called long waves in the framework of the two-scale model. The dependences of the predicted Doppler shifts on the incident angle, the radar frequency, and the wind speed are discussed. At large incident angles, the predicted Doppler shifts for the linear and nonlinear Barrick models are found to be insensitive to the wind speed and this phenomenon is not coincident with the experimental data. The conclusions obtained in this paper are promising for better understanding the properties of time dependent radar echoes from oceanic surfaces.

Abstract: Based on the first order small slope approximation theory (SSA-I) for oceanic surface electromagnetic scattering, this paper predicts the Doppler shifts induced by wave displacements. Theoretical results from three distinct hydrodynamic models are compared: a linear model, the nonlinear Barrick model, and the nonlinear Creamer model. Meanwhile, the predicted Doppler shifts are also compared with the results associated to the resonant Bragg waves and the so-called long waves in the framework of the two-scale model. The dependences of the predicted Doppler shifts on the incident angle, the radar frequency, and the wind speed are discussed. At large incident angles, the predicted Doppler shifts for the linear and nonlinear Barrick models are found to be insensitive to the wind speed and this phenomenon is not coincident with the experimental data. The conclusions obtained in this paper are promising for better understanding the properties of time dependent radar echoes from oceanic surfaces.

Key words: Doppler shifts, sea surface model, SSA-I, electromagnetic scattering

中图分类号: (Upper ocean and mixed layer processes)

92.10.Fj

92.10.Hm (Ocean waves and oscillations) 92.60.Gn (Winds and their effects) 41.20.Jb (Electromagnetic wave propagation; radiowave propagation)

王运华, 张彦敏, 郭立新. Investigation on the Doppler shifts induced by 1-D ocean surface wave displacements by the first order small slope approximation theory: comparison of hydrodynamic models[J]. 中国物理B, 2010, 19(7): 74103-074103.

Wang Yun-Hua(王运华), Zhang Yan-Min(张彦敏), and Guo Li-Xin(郭立新). Investigation on the Doppler shifts induced by 1-D ocean surface wave displacements by the first order small slope approximation theory: comparison of hydrodynamic models[J]. Chin. Phys. B, 2010, 19(7): 74103-074103.

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Investigation on the Doppler shifts induced by 1-D ocean surface wave displacements by the first order small slope approximation theory: comparison of hydrodynamic models

Investigation on the Doppler shifts induced by 1-D ocean surface wave displacements by the first order small slope approximation theory: comparison of hydrodynamic models

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