摘要
以JASON-2卫星在上升和下降轨迹中所形成的交叉点的东海局部海域作为研究区域,以3个交叉点作为研究的实验点,SWAN模式基于1'-0.5'(间隔为0.1')的三角形水深网格的分辨率,对东海局部区域模拟2011年1-8月份的波浪数值,并将模拟的结果与JASON-2卫星的有效波高进行对比,结果表明,采用局部加密的三角形网格能够提高波浪数值模拟的精度,在采用有限三角形网格分辨率情况下,模拟精度随着网格分辨率的规律性增加呈现不规则递增现象,同时,设备运算效率会出现指数似的降低。通过对运算结果的统计可知,采用0.6'的三角形水深网格的分辨率获得模拟结果中精度幅度提高最大,同时加密的三角形网格主要对水深梯度较大的东南区域作用效果明显。
To research the effects of different triangular grid resolutions employed for the wave field variations over the East China Sea, this paper selects three crossover points of the Jason-2 satellite along the ascending and descending tracks and its surrounding local seas as the testing areas from January to August, 2011. Through comparing significant wave height determined by the Jason-2 satellite, it is showed that the simulating precision gradually and disorderly increases, with the computing efficiency exponentially lowering with improving triangular grid resolution from 1＇ to 0.5＇ at the interval of 0.1＇. At the same time, statistical data show that the largest rising amplitude of precision appears for the triangular grid resolution of 0.6＇. In addition, the refined triangular mesh produces its effects mainly in the southeastern area of the East China Sea where the submarine topography gradient is very large.
作者
谢友鸽
郭金运
朱金山
刘新
李国伟
XIE You-ge GUO Jin-yun ZHU Jin-shan LIU Xin LI Guo-wei(College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao 266590, Shandong Province, China Weihai Marine Environmental Monitoring Center, Weihai 264209, Shandong Province, China)
出处
《海洋技术学报》
2017年第1期24-30,共7页
Journal of Ocean Technology
基金
国家自然科学基金资助项目(41374009)
山东省自然科学基金资助项目(ZR2013DM009)
国家科技基础性工作专项资助项目(2015FY310200)
