引用本文:[点击复制]
[点击复制]
【打印本页】 【在线阅读全文】【下载PDF全文】 查看/发表评论下载PDF阅读器关闭

←前一篇|后一篇→

过刊浏览    高级检索

本文已被:浏览 12543次   下载 12253 本文二维码信息
码上扫一扫!
非结构网格模型在闽东沿海台风浪模拟中的应用
何佳
0
(自然资源部第三海洋研究所,福建 厦门 361005)
摘要:
基于加密的非结构三角网格,以Holland模型风场叠加美国国家环境预报中心(NCEP)海面风场构造的合成风场驱动第三代浅水波浪数值模型(SWAN)对2017年影响闽东海域的“纳沙”和“泰利”台风过程进行数值模拟,并运用浮标站的实测数据对模拟结果进行验证.结果表明,模型计算的风速、有效波高与实测值符合较好,合成风场能较好地模拟台风期间的风速变化过程,SWAN模式能够合理地再现闽东沿海台风浪的时空分布特征.由模拟结果可见:台风“纳沙”中心越过台湾岛进入台湾海峡北部海面,受海峡地形的约束,其波浪场呈NE—SW向椭圆状分布,北部海域的浪高大于南部,闽东沿海遍布大范围的巨浪到狂浪;超强台风“泰利”未登陆闽东,当其台风中心与大陆的距离最近时,海面波浪场分布与台风风场结构一致,台风中心附近海域为14 m以上的怒涛区,巨浪遍布于闽东沿海.研究结果可为闽东沿海台风浪灾害预警和应急管理提供技术支撑和参考依据.
关键词:  海洋水文学  台风浪  Holland风场模型  NCEP  SWAN模式  闽东
DOI:10.3969/J.ISSN.2095-4972.2019.01.009
基金项目:国家自然科学基金资助项目(41676028);国家海洋局第三海洋研究所基本科研业务费资助项目(海三科2011010)
Application of an unstructured mesh model to the simulation of typhoon waves in Eastern Fujian coastal waters
HE Jia
(Third Institute of Oceanography,Ministry of Natural Resources,Xiamen 361005,China)
Abstract:
Based on the encrypted unstructured triangular grids and the driven wind that combined the Holland typhoon model with sea surface wind product by National Centers for Environmental Prediction (NCEP), the third generation wave model Simulation Wave Nearshore (SWAN) is used to simulate typhoon Nesat and Talim affecting Eastern Fujian in 2017. The simulated results are compared with the measured data from mooring buoys. The research shows that the numerical simulation values of wind speed and typhoon waves are in good agreement with the measured data. Synthetic wind field can better simulate the process of wind speed change during typhoon. SWAN model can reasonably reproduce the spatial and temporal distribution of typhoon waves in the coast of Eastern Fujian. The results show that when Nesat typhoon center crossed the Taiwan Island and entered the northern sea of the Taiwan Strait, the wave field distributed in an NE-SW elliptical shape confined by the channel topography. During the time, the sea surface wave height in the north is higher than that in the south. A wide range of very rough sea to high sea formed over the coastal sea. Super typhoon Talim did not land on the Eastern Fujian. When the typhoon center was closest to the mainland, the distribution of the sea surface wave field was consistent with the structure of the typhoon wind field. The wave height of the sea near the typhoon center is above 14 meters. Very rough sea distributed in Eastern Fujian coastal waters. The results can provide technical support and reference for the early warning and emergency management of typhoon waves in the coastal areas of Eastern Fujian.
Key words:  marine hydrology  typhoon waves  Holland wind field model  NCEP  SWAN model  Eastern Fujian

用微信扫一扫

用微信扫一扫