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DOI | 10.1175/JAS-D-17-0236.1 |
The Role of WISHE in Secondary Eyewall Formation | |
Cheng, Chieh-Jen; Wu, Chun-Chieh | |
2018-11-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2018 |
卷号 | 75期号:11页码:3823-3841 |
文章类型 | Article |
语种 | 英语 |
国家 | Taiwan |
英文摘要 | Numerical simulations are conducted to examine the role of the wind-induced surface heat exchange (WISHE) mechanism in secondary eyewall formation (SEF). The control experiment exhibits a coherent secondary eyewall structure as quantified by various parameters (e.g., the azimuthal-mean tangential wind and vertical velocity). Prior to SEF, an area characterized by increasing diabatic heating, enhanced inertial stability, and increasing supergradient winds at the top of the boundary layer is observed outside the eyewall. While these characteristics offer the possibility of both balanced and unbalanced dynamical pathways to SEF, the focus of this study is to evaluate the impact of WISHE. To examine the sensitivity of SEF to WISHE, the surface wind used for the calculation of surface heat fluxes is capped at several designated values and at different radial intervals. When the heat fluxes are moderately suppressed around and outside the SEF region observed in the control experiment, sensitivity experiments show that the formation of the outer eyewall is delayed, and the intensity of both eyewalls is weaker. When the heat fluxes are strongly suppressed in the same region, SEF does not occur. In contrast, suppressing the surface heat fluxes in the storm's inner-core region has limited effect on the evolution of the outer eyewall. This study provides important physical insight into SEF, indicating that WISHE plays a crucial role in SEF and tropical cyclone evolution. |
英文关键词 | Tropical cyclones Air-sea interaction Surface fluxes Mesoscale models |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000446821600001 |
WOS关键词 | SEA INTERACTION THEORY ; HURRICANE RITA 2005 ; KALMAN FILTER ENKF ; TROPICAL CYCLONES ; REPLACEMENT CYCLES ; INERTIAL STABILITY ; BOUNDARY-LAYER ; INTENSITY ; MODEL ; DYNAMICS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/29402 |
专题 | 地球科学 |
作者单位 | Natl Taiwan Univ, Dept Atmospher Sci, Taipei, Taiwan |
推荐引用方式 GB/T 7714 | Cheng, Chieh-Jen,Wu, Chun-Chieh. The Role of WISHE in Secondary Eyewall Formation[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2018,75(11):3823-3841. |
APA | Cheng, Chieh-Jen,&Wu, Chun-Chieh.(2018).The Role of WISHE in Secondary Eyewall Formation.JOURNAL OF THE ATMOSPHERIC SCIENCES,75(11),3823-3841. |
MLA | Cheng, Chieh-Jen,et al."The Role of WISHE in Secondary Eyewall Formation".JOURNAL OF THE ATMOSPHERIC SCIENCES 75.11(2018):3823-3841. |
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