Numerical study on the spatially varying drag coefficient in simulation of storm surges employing th

来源 :Chinese Journal of Oceanology and Limnology | 被引量 : 0次 | 上传用户:XYYWLC
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
From the simulation of storm surges resulting from Typhoons 7203 and 8509 in the Bohai Sea, Yellow Sea and East China Sea, water level data at tide stations are assimilated into a two-dimensional storm surge model, to study the spatially varying drag coefficient (DC) by employing the adjoint method. In this study, the DC at some grid points is uniformly selected as the independent DC, while the DC at other grid points is obtained through linear interpolation of the independent DC. The DC at independent points is optimized by employing the adjoint assimilation method, and global optimization is achieved by optimizing the independent DC. To demonstrate the method’s performance, three comparative experiments are carried out. In the first experiment, the DC is treated as a constant. In the second and third experiments, the DC is derived using an empirical formula. Comparing the experimental results, it is found that the simulation accuracy for both Typhoons 7203 and 8509 increases greatly when optimizing the independent DC. However, the number of independent points makes no great difference to the precision of simulation. Moreover, the DC inverted from Typhoons 7203 and 8509 differs in some sea areas because of the different typhoon tracks. However, the spatial distribution of the inverted DC, for both Typhoons 7203 and 8509, demonstrates a clear effect of the DC on the storm surge modeling near the coastal areas where the DC is highest or lowest. From the simulation of storm surges resulting from Typhoons 7203 and 8509 in the Bohai Sea, Yellow Sea and East China Sea, water level data at tide stations are assimilated into a two-dimensional storm surge model, to study the spatially varying drag coefficient (DC ) by employing the adjoint method. In this study, the DC at some grid points is uniformly selected as the independent DC, while the DC at other grid points is obtained through linear interpolation of the independent DC. The DC at independent points is optimized by employing the adjoint assimilation method, and global optimization is achieved by optimizing the independent DC. To demonstrate the method’s performance, three comparative runs are carried out. In the first experiment, the DC is treated as a constant. the DC is derived using an empirical formula. Comparing the experimental results, it is found that the simulation accuracy for both Typhoons 7203 and 8509 increases greatly when optimizing the independent DC. However, the number of independent points makes no great difference to the precision of simulation. However, the DC inverted from Typhoons 7203 and 8509 differs in some sea areas because of the different typhoon tracks. However, the spatial distribution of the inverted DC, for both Typhoons 7203 and 8509, demonstrates a clear effect of the DC on the storm surge modeling near the coastal areas where the DC is highest or lowest.
其他文献
杨烁小朋友创作的《毛泽东主席诗·冬云》,结体大方,但字体过大,给人造成一种透不过气来的沉闷感,这一点一定要引起注意。作品中表现难得的地方是斜点、三点水、四点底写得
一只调皮的小狐狸,安详地俯卧在地上,它将前肢趴下,屁股则高高地撅起,侧转头正好奇地注视着什么?在它的面前,是谁信手放在野地里的鸟笼,而罩在鸟笼上的红布又被谁半撩开了?笼
经中国文化部批准,由文化部中外文化交流中心、江苏省常州市人民政府和江苏省人民政府新闻办公室联合主办的2004中国国际卡通·数码艺术周(以下简称艺术周)将于金秋9月底至10
请下载后查看,本文暂不支持在线获取查看简介。飞越想象科幻画选 Please download to view, this article does not support online access to view profile. Flying over im
期刊
在二十世纪八九十年代,开始出现了艺术的一个大的发展时期,凭借着西方现代主义带来的冲击而开始向之靠拢,借由自己的情绪抒发而模仿并探索着属于自己的艺术道路。
偶极声波测井技术自投入使用近30年来,以其在横波测量、横波各向异性分析方面的独特优势使其在测井、地震、地质、油藏工程各方面得到了广泛运用.偶极声波测井资料包含的纵波
文化负载词的翻译一直是翻译研究的重点和难点。本文结合外宣翻译的特点,利用近年来国内外主要翻译研究成果,对外宣翻译中的文化负载词翻译现状进行分析,并进一步探讨外宣翻
A numerical study of sea waves generated by tropical cyclone Jelawat is carried out using the cycle 4 version of the WAM.The model domain currently covers the l
实景演出能够展示地方民族文化,起到宣传城市文化形象的作用。本文分析了具有较大影响力的山水实景演出剧目,通过理论研究与案例分析,找到造成实景演出发展瓶颈的深层原因。
结识徐雄关的几年以来,我一直是以崇敬的眼光看他的。一是他的勤奋,二是他的书艺。以徐雄关的年纪,书、画、印俱能,尤其书法篆刻达到如此之高度,以笔者陋见,在浙江也是很少见