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

Masaya Toyoda Orcid Logo, Nobuhito Mori, Jun Yoshino

Coastal Engineering Journal, Volume: 64, Issue: 2, Pages: 1 - 11

Swansea University Author: Nobuhito Mori

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DOI (Published version): 10.1080/21664250.2022.2035514

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 parameter...

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Published in: Coastal Engineering Journal
ISSN: 2166-4250 1793-6292
Published: Informa UK Limited 2022
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URI: https://cronfa.swan.ac.uk/Record/cronfa59415
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spelling 2022-06-13T16:13:45.4808355 v2 59415 2022-02-16 Optimization of empirical typhoon model considering the difference of radius between pressure gradient and wind speed distributions 2cab1605807300324c85b4ec1a1a93c6 Nobuhito Mori Nobuhito Mori true false 2022-02-16 FGSEN 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. Journal Article Coastal Engineering Journal 64 2 1 11 Informa UK Limited 2166-4250 1793-6292 Empirical typhoon model; radius ratio; radius of maximum wind speed; radius of maximum pressure gradient; storm surge 6 2 2022 2022-02-06 10.1080/21664250.2022.2035514 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University This work was supported by the Japan society for the promotion of science [19H00782]; Japan Society for the Promotion of Science [21K20447]; ministry of education, culture, sports, science and technology [JPMXD0717935498]; Japan society for the promotion of science [20J00218]. 2022-06-13T16:13:45.4808355 2022-02-16T15:57:09.6363531 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Masaya Toyoda 0000-0002-7124-100x 1 Nobuhito Mori 2 Jun Yoshino 3 59415__22388__de253d786dd4454591f926fd83d2a8cb.pdf 59415.pdf 2022-02-16T16:01:31.1150602 Output 4663798 application/pdf Version of Record true © 2022 The Author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License true eng http://creativecommons.org/licenses/by-nc-nd/4.0/
title Optimization of empirical typhoon model considering the difference of radius between pressure gradient and wind speed distributions
spellingShingle Optimization of empirical typhoon model considering the difference of radius between pressure gradient and wind speed distributions
Nobuhito Mori
title_short Optimization of empirical typhoon model considering the difference of radius between pressure gradient and wind speed distributions
title_full Optimization of empirical typhoon model considering the difference of radius between pressure gradient and wind speed distributions
title_fullStr Optimization of empirical typhoon model considering the difference of radius between pressure gradient and wind speed distributions
title_full_unstemmed Optimization of empirical typhoon model considering the difference of radius between pressure gradient and wind speed distributions
title_sort Optimization of empirical typhoon model considering the difference of radius between pressure gradient and wind speed distributions
author_id_str_mv 2cab1605807300324c85b4ec1a1a93c6
author_id_fullname_str_mv 2cab1605807300324c85b4ec1a1a93c6_***_Nobuhito Mori
author Nobuhito Mori
author2 Masaya Toyoda
Nobuhito Mori
Jun Yoshino
format Journal article
container_title Coastal Engineering Journal
container_volume 64
container_issue 2
container_start_page 1
publishDate 2022
institution Swansea University
issn 2166-4250
1793-6292
doi_str_mv 10.1080/21664250.2022.2035514
publisher Informa UK Limited
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
active_str 0
description 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.
published_date 2022-02-06T04:16:42Z
_version_ 1763754117772083200
score 11.036334

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