灾害学2017，Vol.32Issue(4)：51-59,9.DOI:10.3969/j.issn.1000-811X.2017.04.009
一种台风风场动力学订正方法的研究
Investigation on a Dynamical Correction Method of Wind Field in Typhoons
摘要
Abstract
Accurate atmospheric forcing field is critical to the simulation of storm surge and other marine disasters.We combine the advantages of empirical and numerical wind fields,and presents a new method of wind field correction through dynamical decomposition of vorticity velocity and divergence velocity from the typhoon wind field.Four typical typhoon cases over South China Sea are used to compare the accuracy between synthetic wind field and empirical or numerical wind fields,the results show that the wind field simulation in synthetic model is improved significantly.The synthetic model could locate the typhoon center precisely and simulate the wind field around typhoon eyes accurately,as well as maintain the predominance of numerical wind field over typhoon periphery.Both of the extreme wind speeds and peak time of wind sequences are simulated exactly,and the modellings of weak wind are also consistent with observation.The multi-site analysis shows that,the phases and magnitudes of wind field simulation in synthetic model are consistent with observation,and the simulation performances of wind duration and peak time simulation are improved significantly in synthetic model,which satisfy the accuracy requirements of atmospheric forcing field in marine disaster simulation.关键词
台风/风场/动力学订正/合成风场/涡度场速度/散度场速度Key words
wind field correction/synthetic wind field/vorticity velocity/divergence velocity分类
资源环境引用本文复制引用
王宇星,杨学联,蔡琼琼,韩振宇,郑腾飞..一种台风风场动力学订正方法的研究[J].灾害学,2017,32(4):51-59,9.基金项目
海洋公益性行业科研专项经费项目(201505018) （201505018）
国家自然科学基金项目(41405075,41405101) （41405075,41405101）
