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DOI | 10.1175/JAS-D-17-0207.1 |
Secondary Eyewall Formation and Concentric Eyewall Replacement in Association with Increased Low-Level Inner-Core Diabatic Cooling | |
Chen, Guanghua1,2 | |
2018-08-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2018 |
卷号 | 75期号:8页码:2659-2685 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | The role of increased diabatic cooling in secondary eyewall formation (SEF) and eyewall replacement cycle (ERC) is examined using idealized numerical simulation. The experiment with the low-level inner-core diabatic cooling increased by 30% features the low-entropy air and downward motion in the inner-core region whereas the convergence and active convective updrafts are in the outer-core region. In collaboration with the favorable ambient dynamical conditions and boundary layer dynamical processes, the concentric convective ring is initiated with the aid of the outward expansion of strong wind field, and then contracts inward to replace the inner eyewall. Subsequently, the deep-tropospheric radial outflows driven by the large outward-directed agradient force related to the massive strong tangential wind generate a largely outward-tilted eyewall, eventually forming a large-eyed storm. The sensitivity to the strength and radial location of diabatic cooling shows that neither the 20% increase nor 10-km radially inward shift of the low-level cooling produces a pronounced SEF and ERC because of the lack of an evident moat region. In contrast, both the 40% increase and 10-km radially outward shift of cooling lead to the active outer rainbands occurring at a larger radius. In the former case, because of the deep-layer radial outflow above the boundary layer, the largely outward-tilted concentric eyewall shrinks slowly, directly creating a large-eyed structure. In the latter case, the formation of concentric eyewall is delayed because of the low inertial stability at a large radius, but experiences an expeditious ontraction because of the strong radial inflow. |
英文关键词 | Hurricanes Tropical cyclones |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000439546900002 |
WOS关键词 | SIMULATED TROPICAL CYCLONE ; RAPID FILAMENTATION ZONE ; SEA INTERACTION THEORY ; VORTEX ROSSBY-WAVES ; BOUNDARY-LAYER ; PART II ; ASYMMETRIC STRUCTURE ; HURRICANE INTENSITY ; INERTIAL STABILITY ; VERTICAL STRUCTURE |
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/29389 |
专题 | 地球科学 |
作者单位 | 1.Chinese Acad Sci, Ctr Monsoon Syst Res, Inst Atmospher Phys, Beijing, Peoples R China; 2.Nanjing Univ Informat Sci & Technol, Key Lab Meteorol Disaster, Minist Educ, Nanjing, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Chen, Guanghua. Secondary Eyewall Formation and Concentric Eyewall Replacement in Association with Increased Low-Level Inner-Core Diabatic Cooling[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2018,75(8):2659-2685. |
APA | Chen, Guanghua.(2018).Secondary Eyewall Formation and Concentric Eyewall Replacement in Association with Increased Low-Level Inner-Core Diabatic Cooling.JOURNAL OF THE ATMOSPHERIC SCIENCES,75(8),2659-2685. |
MLA | Chen, Guanghua."Secondary Eyewall Formation and Concentric Eyewall Replacement in Association with Increased Low-Level Inner-Core Diabatic Cooling".JOURNAL OF THE ATMOSPHERIC SCIENCES 75.8(2018):2659-2685. |
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