海洋科学2023，Vol.47Issue(11)：1-11,11.DOI:10.11759/hykx20221129001
高分辨率风场对长江口海域波浪场模拟能力的影响研究——以台风"灿都"为例
Influence of high-resolution winds on the simulation of sur-face waves over the Changjiang River Estuary:a case study of Typhoon Chanthu
摘要
Abstract
The Changjiang River Estuary has abundant islands and complex variable topography.The simulation and fore-casting of extreme ocean waves need immediate improvement to avoid further economic losses caused by disasters.A high-resolution unstructured simulating wave nearshore model has been developed to study the effects of high-resolution winds on surface wave simulations over the Changjiang River Estuary.Four wind products with resolutions ranging from 27 to 1 km produced by the Asia-Pacific Regional Coupled Prediction System are adopted.Considering typhoon Chanthu 202114 as an example,the effects of wind resolution,typhoon tracking bias,and propagating speed on wave simulations have been examined.Results reveal that finer wind resolution produces more detailed typhoon structures and bet-ter-developed inner spiral bands than coarse wind resolution.Comparison between various winds reveals that cases with finer wind resolution increase the wind speed in the central part of typhoons(≤2Rmax)and the outer spiral bands but gener-ally decrease the wind speed in the outer part.Wave simulations adopting different winds suggest that the model skill has been considerably improved when the wind resolution increases from 27 to 3 km,and the simulation run with a 3-km-resolution analysis wind gives the best model-data comparison.Increasing the wind resolution further to 1 km negli-gibly affects wave improvement.Changing the wind resolutions modifies the wind structure and intensity and alters the ty-phoon track and propagating rate.Modifications to wave simulations reflect the combined effects of the wind structure,track shifts,and propagating rate.The spatial extension of the difference in typhoon waves is generally larger than that of the dif-ference in winds because the propagating waves translate the distinction to larger areas.关键词
台风浪/高分辨率/台风结构/SWAN/长江口Key words
typhoon wave/high-resolution/typhoon structure/SWAN/Changjiang River Estuary分类
海洋科学引用本文复制引用
李一国,荣增瑞,孟鑫,姜岩,于晓林..高分辨率风场对长江口海域波浪场模拟能力的影响研究——以台风"灿都"为例[J].海洋科学,2023,47(11):1-11,11.基金项目
山东省重点研究发展计划项目(2021CXGC010705)Major Scientific and Technological Innovation Project(MSTIP)of Shandong,No.2021CXGC010705 （2021CXGC010705）
