| 基于合成孔径雷达的长江口海表流场反演 |
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| 作者姓名： | WANG Lihu ZHOU Yunxuan GE Jianzhong JOHANNESSEN Johnny A. SHEN Fang |
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| 作者单位： | State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China;State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China;State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China;Nansen Environmental and Remote Sensing Center, Bergen 5006, Norway;Geophysical Institute, University of Bergen, Bergen 5006, Norway;State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China |
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| 基金项目： | The National Basic Research Program (973 Program) of China under contract No.2010CB951204，European Space Agency-Min-istry of Science and Technology of the People’s Republic of China Dragon 3 Cooperation Programme under contract No.10593，the State Key Labo-ratory of Estuarine and Coastal Research |
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| 摘 要： | Range Doppler velocities derived from the Envisat advanced synthetic aperture radar（ASAR） wide swath images are analyzed and assessed against the numerically simulated surface current fields derived from the finite volume coastal ocean model（FVCOM） for the Changjiang Estuary. Comparisons with the FVCOM simulations show that the European Space Agency（ESA） Envisat ASAR based Doppler shift anomaly retrievals have the capability to capture quantitative information of the surface currents in the Changjiang Estuary. The uncertainty analysis of the ASAR range Doppler velocity estimates are discussed with regard to the azimuthal and range bias corrections, radar incidence angles, inaccuracy in the wind field corrections and the presence of rain cells.The corrected range Doppler velocities for the Changjiang Estuary area are highly valuable as they exhibit quantitative expressions related to the multiscale upper layer dynamics and surface current variability around the East China Sea, including the Changjiang Estuary.
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| 关 键 词： | 合成孔径雷达 多普勒速度 长江沿岸 长江口地区 ENVISAT 海面 ASAR 表面电流 |
| 收稿时间： | 2014/2/24 0:00:00 |
| 修稿时间： | 2014/3/20 0:00:00 |
Mapping sea surface velocities in the Changjiang coastal zone with advanced synthetic aperture radar |
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| WANG Lihu,ZHOU Yunxuan,GE Jianzhong,JOHANNESSEN Johnny A.,SHEN Fang.Mapping sea surface velocities in the Changjiang coastal zone with advanced synthetic aperture radar[J].Acta Oceanologica Sinica,2014,33(11):141-149. |
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| Authors: | WANG Lihu ZHOU Yunxuan GE Jianzhong JOHANNESSEN Johnny A and SHEN Fang |
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| Institution: | 1.State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China2.Nansen Environmental and Remote Sensing Center, Bergen 5006, Norway;Geophysical Institute, University of Bergen, Bergen 5006, Norway |
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| Abstract: | Range Doppler velocities derived from the Envisat advanced synthetic aperture radar (ASAR) wide swath images are analyzed and assessed against the numerically simulated surface current fields derived from the finite volume coastal ocean model (FVCOM) for the Changjiang Estuary. Comparisons with the FVCOM simulations show that the European Space Agency (ESA) Envisat ASAR based Doppler shift anomaly retrievals have the capability to capture quantitative information of the surface currents in the Changjiang Estuary. The uncertainty analysis of the ASAR range Doppler velocity estimates are discussed with regard to the azimuthal and range bias corrections, radar incidence angles, inaccuracy in the wind field corrections and the presence of rain cells.The corrected range Doppler velocities for the Changjiang Estuary area are highly valuable as they exhibit quantitative expressions related to the multiscale upper layer dynamics and surface current variability around the East China Sea, including the Changjiang Estuary. |
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| Keywords: | advanced synthetic aperture radar Changjiang coast Doppler centroid anomaly range Doppler velocity finite volume coastal ocean model |
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