Optimization of empirical typhoon model considering the difference of radius between pressure gradient and wind speed distributions

IF 1.9 3区工程技术 Q3 ENGINEERING, CIVIL

Coastal Engineering Journal Pub Date : 2022-02-06 DOI:10.1080/21664250.2022.2035514

M. Toyoda, N. Mori, J. Yoshino

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引用次数: 2

Abstract

ABSTRACT This study proposes empirical relations for the ratio of the radius of maximum pressure gradient to the radius of maximum wind speed for the empirical typhoon model (ETM) based on the results of analysis of multiple typhoons obtained from the meteorological model. One proposed relation was parameterized based on the attenuation rate from the peak time to landfall time. The other was parameterized based on the distance from where the typhoon reached its peak intensity to the coastline. These relationships are useful for practical applications. In addition, the typhoon pressure shape parameter B was calculated from the constructed equations and the relational equation proposed by Holland. The improvement in accuracy, as compared with conventional ETM (B = 1, and B estimated by the gradient-wind equilibrium assumption), was determined for three cases of typhoons making landfall in Japan in recent years. As a result, it was confirmed that the proposed equations for parameter B are the most accurate amongst the three estimation methods. Accordingly, the improvement in the accuracy of the ETM using the estimation equations was validated. When using the ETM in the future, high accuracy can be realized by utilizing the estimation equations used in this study.

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考虑气压梯度和风速分布半径差的经验台风模型优化

基于气象模式对多个台风的分析结果，提出了经验台风模式(ETM)最大压力梯度半径与最大风速半径之比的经验关系式。提出了一种基于峰值时间到登陆时间衰减率的参数化关系。另一个是根据台风达到其峰值强度到海岸线的距离来参数化的。这些关系在实际应用中很有用。此外，根据所构建的方程和Holland提出的关系方程计算了台风压力形状参数B。与传统的ETM (B = 1, B由梯度-风平衡假设估计)相比，对近年来在日本登陆的三次台风的精度进行了改进。结果表明，所提出的参数B方程是三种估计方法中最准确的。由此验证了利用该估计方程提高ETM精度的有效性。在将来使用ETM时，利用本文所使用的估计方程可以实现较高的精度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Coastal Engineering Journal 工程技术-工程：大洋

CiteScore

4.60

自引率

8.30%

发文量

审稿时长

7.5 months

期刊介绍： Coastal Engineering Journal is a peer-reviewed medium for the publication of research achievements and engineering practices in the fields of coastal, harbor and offshore engineering. The CEJ editors welcome original papers and comprehensive reviews on waves and currents, sediment motion and morphodynamics, as well as on structures and facilities. Reports on conceptual developments and predictive methods of environmental processes are also published. Topics also include hard and soft technologies related to coastal zone development, shore protection, and prevention or mitigation of coastal disasters. The journal is intended to cover not only fundamental studies on analytical models, numerical computation and laboratory experiments, but also results of field measurements and case studies of real projects.