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ocean surface wave measurements from fully polarimetric SAR imagery

Science China Earth Sciences 2015年第10期58卷 1849-1861页

作者： XIE Tao William PERRIE HE YiJun LI HaiYan FANG He ZHAO ShangZhuo YU WenJin School of Marine Sciences Nanjing University of Information Science and Technology Fisheries and oceans Canada Bedford Institute of Oceanography Key Laboratory of Computational Geodynamics Chinese Academy of Sciences College of Earth Sciences University of Chinese Academy of Sciences

A new method for the retrieval of ocean wave parameters from SAR imagery is developed,based on the shape-from-shading(SFS)***,the SFS technique has been used in the reconstruction of 3D landform information from SAR images,in order to generate elevation maps of topography for land ***,in order to retrieve ocean wave characteristics,we apply the SFS methodology,together with a method to orient the angular measurements of the azimuth slope and range slope,in the measurement of ocean surface *** method is applied to high resolution fine-quad polarization mode(HH,VV,VH and HV)C-band RADARSAT-2 SAR imagery,in order to retrieve ocean wave spectra and extract wave *** in situ buoy measurements are used to validate the reliability of this *** show that the method can reliably estimate wave height,dominant wave period,dominant wave length and dominant wave direction from C-band SAR *** advantage of this method is that it does not depend on modulation transfer functions(MTFs),in order to measure ocean surface *** method can be used in monitoring ocean surface wave propagation through open water areas into ice-covered areas,especially the marginal ice zone(MIZ)in polar oceans.

关键词： polarimetric SAR imagery ocean surface wave shape from shading

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Effects of winds,tides and storm surges on ocean surface waves in the Sea of Japan

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Acta oceanologica Sinica 2007年第3期26卷 9-21页

作者： ZHAO Wei TIAN Jiwei LI Peiliang HOU Yijun College of Physical and Environmental oceanography Ocean University of ChinaQingdao 266100 China Institute of oceanology Chinese Academy of SciencesQingdao 266071 China

ocean surface waves are strongly forced by high wind conditions associated with winter storms in the Sea of Japan. They are also modulated by tides and storm surges. The effects of the variability in surface wind forcing, tides and storm surges on the waves are investigated using a wave model, a high-resolution atmospheric mesoscale model and a hydrodynamic ocean circulation model. Five month-long wave model simulations are inducted to examine the sensitivity of ocean waves to various wind forcing fields, tides and storm surges during January 1997. Compared with observed mean wave parameters, results indicate that the high frequency variability in the surface wind filed has very great effect on wave simulation. Tides and storm surges have a significant impact on the waves in nearshores of the Tsushima-kaihyS, but not for other regions in the Sea of Japan. High spatial and temporal resolution and good quality surface wind products will be crucial for the prediction of surface waves in the JES and other marginal seas, especially near the coastal regions.

关键词： ocean surface wave Sea of Japan winter storm tide storm surge

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