Impacts of wave-induced ocean surface turbulent kinetic energy flux on typhoon characteristics

IF 1.9 3区工程技术 Q3 ENGINEERING, CIVIL

Coastal Engineering Journal Pub Date : 2022-01-02 DOI:10.1080/21664250.2021.2017191

M. Takagi, J. Ninomiya, N. Mori, T. Shimura, T. Miyashita

{"title":"Impacts of wave-induced ocean surface turbulent kinetic energy flux on typhoon characteristics","authors":"M. Takagi, J. Ninomiya, N. Mori, T. Shimura, T. Miyashita","doi":"10.1080/21664250.2021.2017191","DOIUrl":null,"url":null,"abstract":"ABSTRACT The parameterization of the sea surface turbulent kinetic energy (TKE) flux due to wave breaking was revisited using the observed data. It is found that the fraction of wave energy taken up into the ocean as sea surface TKE flux depends on the relative angle between wind and wave direction. The fraction tends to be larger under opposite wind conditions than following wind conditions. Based on the observed results, a new parameterization of TKE flux was proposed. The TKE flux parameterization was implemented into the atmosphere-ocean-wave coupled model. The experiments on typhoon hindcast using the model showed that TKE flux affects weak mixing at the ocean surface, strong mixing at the bottom of the mixed layer, and near-inertial internal waves depending on the thickness of the mixed layer depth (MLD). In the coupled atmosphere-ocean-wave model, the effects of these mixing differences are also fed back to the atmospheric side; the maximum difference in the central pressure of the typhoon depending on TKE flux parameterization is 10 hPa. The results of this study suggest the importance of considering waves in the sea surface TKE flux for typhoon simulations.","PeriodicalId":50673,"journal":{"name":"Coastal Engineering Journal","volume":null,"pages":null},"PeriodicalIF":1.9000,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Coastal Engineering Journal","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1080/21664250.2021.2017191","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}

引用次数: 0

Abstract

ABSTRACT The parameterization of the sea surface turbulent kinetic energy (TKE) flux due to wave breaking was revisited using the observed data. It is found that the fraction of wave energy taken up into the ocean as sea surface TKE flux depends on the relative angle between wind and wave direction. The fraction tends to be larger under opposite wind conditions than following wind conditions. Based on the observed results, a new parameterization of TKE flux was proposed. The TKE flux parameterization was implemented into the atmosphere-ocean-wave coupled model. The experiments on typhoon hindcast using the model showed that TKE flux affects weak mixing at the ocean surface, strong mixing at the bottom of the mixed layer, and near-inertial internal waves depending on the thickness of the mixed layer depth (MLD). In the coupled atmosphere-ocean-wave model, the effects of these mixing differences are also fed back to the atmospheric side; the maximum difference in the central pressure of the typhoon depending on TKE flux parameterization is 10 hPa. The results of this study suggest the importance of considering waves in the sea surface TKE flux for typhoon simulations.

查看原文本刊更多论文

波浪诱导的海面湍流动能通量对台风特征的影响

利用实测资料，重新探讨了波浪破碎引起的海面湍流动能(TKE)通量的参数化问题。研究发现，波浪能作为海面TKE通量被吸收到海洋中的比例取决于风向与波浪方向的相对夹角。在逆风条件下，该分数往往比顺风条件下更大。根据观测结果，提出了一种新的TKE通量参数化方法。将TKE通量参数化实现到大气-海洋-波浪耦合模型中。利用该模式进行的台风后投实验表明，TKE通量对海洋表面弱混合、混合层底部强混合和近惯性内波的影响随混合层深度(MLD)的厚度而变化。在大气-海浪耦合模式中，这些混合差异的影响也反馈到大气侧;基于TKE通量参数化的台风中心气压最大差值为10 hPa。本研究结果表明，考虑海面TKE通量中的波浪对台风模拟的重要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

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.