| A study of SAR remote sensing of internal solitary waves in the north of the South China Sea: Ⅱ. Simulation of SAR signatures of internal solitary waves |
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| 作者姓名： | FAN Zhisong ZHANG Yuanling SONG Mei |
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| 作者单位： | College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China |
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| 基金项目： | 国家高技术研究发展计划(863计划)，国家自然科学基金 |
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| 摘 要： | A new model developed from the full-spectrum model of Lyzenga and Bennett （ 1988 ） is built up by us preliminarily through considering the impact of the ocean surface mixed layer turbulence on SAR remote sensing of internal solitary waves. In the partial differential equation of the action spectral density of the surface gravity-capillary waves the source function representing the contribution of the turbulence is added besides the usual source function representing the contribution of the wind. The source function is determined by applying the κ - ε model and adopting the Nasmyth spectrum of oceanic turbulence （ Nasmyth, 1970; Oakey, 1982; Fan, 2002） on the basis of the previous simulation results of internal tide transformation obtained in the companion paper （Fan et al. ,2008）. Either under relatively high wind speed, or under low wind speed, our model predicts significant large modulations of radar backscatter at all three bands （ L, C and X bands） for both VV and HH polarization. These results prove that considering the impact of ocean surface mixed layer turbulence on SAR remote sensing of internal solitary waves is reasonable and appropriate for settlement of the well-known problem of contemporary radar imaging models.
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| 关 键 词： | 潮汐 内波 海洋学 动力学 |
| 收稿时间： | 2007/7/23 0:00:00 |
| 修稿时间： | 2007/12/9 0:00:00 |
A study of SAR remote sensing of internal solitary waves in the north of the South China Sea: II. Simulation of SAR signatures of internal solitary waves |
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| FAN Zhisong,ZHANG Yuanling,SONG Mei.A study of SAR remote sensing of internal solitary waves in the north of the South China Sea: II. Simulation of SAR signatures of internal solitary waves[J].Acta Oceanologica Sinica,2008,27(5):36-48. |
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| Authors: | FAN Zhisong ZHANG Yuanling and SONG Mei |
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| Institution: | College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China |
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| Abstract: | A new model developed from the full-spectrum model of Lyzenga and Bennett (1988) is built up by us preliminarily through considering the impact of the ocean surface mixed layer turbulence on SAR remote sensing of internal solitary waves. In the partial differential equation of the action spectral density of the surface gravity-capillary waves the source function representing the contribution of the turbulence is added besides the usual source function representing the contribution of the wind. The source function is determined by applying the k-εmodel and adopting the Nasmyth spectrum of oceanic turbulence ( Nasmyth, 1970 ; Oakey, 1982; Fan, 2002 ) on the basis of the previous simulation results of internal tide transformation obtained in the companion paper ( Fan et al. ,2008 ). Either under relatively high wind speed, or under low wind speed, our model predicts significant large modulations of radar backscatter at all three bands ( L, C and X bands) for both VV and HH polarization. These results prove that considering the impact of ocean surface mixed layer turbulence on SAR remote sensing of internal solitary waves is reasonable and appropriate for settlement of the well-known problem of contemporary radar imaging models. |
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| Keywords: | internal tide internal solitary waves turbulence SAR remote sensing |
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