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| DOI | 10.5194/acp-19-14289-2019 |
| Role of eyewall and rainband eddy forcing in tropical cyclone intensification | |
| Zhu P.; Tyner B.; Zhang J.A.; Aligo E.; Gopalakrishnan S.; Marks F.D.; Mehra A.; Tallapragada V. | |
| 发表日期 | 2019 |
| ISSN | 16807316 |
| 起始页码 | 14289 |
| 结束页码 | 14310 |
| 卷号 | 19期号:22 |
| 英文摘要 | While turbulence is commonly regarded as a flow feature pertaining to the planetary boundary layer (PBL), intense turbulent mixing generated by cloud processes also exists above the PBL in the eyewall and rainbands of a tropical cyclone (TC). The in-cloud turbulence above the PBL is intimately involved in the development of convective elements in the eyewall and rainbands and consists of a part of asymmetric eddy forcing for the evolution of the primary and secondary circulations of a TC. In this study, we show that the Hurricane Weather Research and Forecasting (HWRF) model, one of the operational models used for TC prediction, is unable to generate appropriate sub-grid-scale (SGS) eddy forcing above the PBL due to a lack of consideration of intense turbulent mixing generated by the eyewall and rainband clouds. Incorporating an in-cloud turbulent-mixing parameterization in the vertical turbulent-mixing scheme notably improves the HWRF model's skills in predicting rapid changes in intensity for several past major hurricanes. While the analyses show that the SGS eddy forcing above the PBL is only about one-fifth of the model-resolved eddy forcing, the simulated TC vortex inner-core structure, secondary overturning circulation, and the model-resolved eddy forcing exhibit a substantial dependence on the parameterized SGS eddy processes. The results highlight the importance of eyewall and rainband SGS eddy forcing to numerical prediction of TC intensification, including rapid intensification at the current resolution of operational models. © Author(s) 2019. |
| 语种 | 英语 |
| scopus关键词 | atmospheric forcing; boundary layer; climate modeling; climate prediction; mesoscale eddy; parameterization; rainband; tropical cyclone; turbulent mixing |
| 来源期刊 | Atmospheric Chemistry and Physics
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/144017 |
| 作者单位 | Department of Earth and Environment, Extreme Events Institute, Florida International University, Miami, FL 33199, United States; Hurricane Research Division, AOML, NOAA, Miami, FL 33149, United States; Cooperative Institute for Marine and Atmospheric Studies, University of Miami, Miami, FL 33149, United States; Environmental Modeling Center, NCEP, NOAA, College Park, MD 20740, United States |
| 推荐引用方式 GB/T 7714 | Zhu P.,Tyner B.,Zhang J.A.,et al. Role of eyewall and rainband eddy forcing in tropical cyclone intensification[J],2019,19(22). |
| APA | Zhu P..,Tyner B..,Zhang J.A..,Aligo E..,Gopalakrishnan S..,...&Tallapragada V..(2019).Role of eyewall and rainband eddy forcing in tropical cyclone intensification.Atmospheric Chemistry and Physics,19(22). |
| MLA | Zhu P.,et al."Role of eyewall and rainband eddy forcing in tropical cyclone intensification".Atmospheric Chemistry and Physics 19.22(2019). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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