Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019JD030586 |
Effect of Unidirectional Vertical Wind Shear on Tropical Cyclone Intensity Change-Lower-Layer Shear Versus Upper-Layer Shear | |
Fu, Hao1,2,3,4; Wang, Yuqing3,4,5; Riemer, Michael6; Li, Qingqing1,2 | |
2019-06-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:12页码:6265-6282 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA; Germany |
英文摘要 | In this study, a quadruply nested, nonhydrostatic tropical cyclone (TC) model is used to investigate how the structure and intensity of a mature TC respond differently to imposed lower-layer and upper-layer unidirectional environmental vertical wind shears (VWSs). Results show that TC intensity in both cases decrease shortly after the VWS is imposed but with quite different subsequent evolutions. The TC weakens much more rapidly for a relatively long period in the upper-layer shear than in the lower-layer shear, which is found to be related to the stronger storm-relative asymmetric flow in the middle-upper troposphere and the larger vertical vortex tilt in the former than in the latter. The stronger storm-relative flow in the former imposes a greater ventilation of the warm core in the middle-upper troposphere, leading to a more significant weakening of the storm. The storm in the lower-layer shear only weakens initially after the VWS is imposed but then experiences a quasi periodic intensity oscillation with a period of about 24 hr. This quasi periodic behavior is found to be closely related to the boundary layer thermodynamic discharge/recharge mechanism associated with the activity of shear-induced outer spiral rainbands. There is no significant intensity oscillation for the storm embedded in the upper-layer shear, even though outer spiral rainbands develop quasi periodically also. The boundary layer inflow is very weak in that case and the low equivalent potential temperature air induced by downdrafts in outer spiral rainbands therefore cannot penetrate into the inner core but remains in the outer region. Plain Language Summary In this study, how the structure and intensity of a mature tropical cyclone (TC) respond differently to imposed lower-layer and upper-layer unidirectional environmental vertical wind shears is investigated. It is found that TC intensity in both cases decrease shortly after the vertical wind shear was imposed but with quite different subsequent evolutions. The TC weakens much more rapidly for a relatively long period in the upper-layer shear than in the lower-layer shear, which is found to be related to the stronger storm-relative asymmetric flow in the middle-upper troposphere, which imposes a greater ventilation of the warm core of the storm and a larger vertical vortex tilt in the upper-layer shear. The storm in the lower-layer shear only weakens initially but then experiences a quasi periodic intensity oscillation, which is found to be closely related to the boundary layer thermodynamic discharge/recharge mechanism associated with the activity of shear-induced outer spiral rainbands. |
英文关键词 | tropical cyclones vertical wind shear |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000477800000022 |
WOS关键词 | ENVIRONMENTAL DYNAMICAL CONTROL ; PREDICTION SCHEME SHIPS ; TYPHOON VICENTE 2012 ; HURRICANE INTENSITY ; RAPID INTENSIFICATION ; STATISTICAL-ANALYSIS ; MODEL DESCRIPTION ; MOVABLE MESH ; PART II ; FLOW |
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/184175 |
专题 | 气候变化 |
作者单位 | 1.Nanjing Univ Informat Sci & Technol, Pacific Typhoon Res Ctr, Nanjing, Jiangsu, Peoples R China; 2.Nanjing Univ Informat Sci & Technol, Minist Educ KLME, Key Lab Meteorol Disaster, Nanjing, Jiangsu, Peoples R China; 3.Univ Hawaii Manoa, Sch Ocean & Earth Sci & Technol, Int Pacific Res Ctr, Honolulu, HI 96822 USA; 4.Univ Hawaii Manoa, Sch Ocean & Earth Sci & Technol, Dept Atmospher Sci, Honolulu, HI 96822 USA; 5.China Meteorol Adm, Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing, Peoples R China; 6.Johannes Gutenberg Univ Mainz, Inst Atmospher Phys, Mainz, Germany |
推荐引用方式 GB/T 7714 | Fu, Hao,Wang, Yuqing,Riemer, Michael,et al. Effect of Unidirectional Vertical Wind Shear on Tropical Cyclone Intensity Change-Lower-Layer Shear Versus Upper-Layer Shear[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(12):6265-6282. |
APA | Fu, Hao,Wang, Yuqing,Riemer, Michael,&Li, Qingqing.(2019).Effect of Unidirectional Vertical Wind Shear on Tropical Cyclone Intensity Change-Lower-Layer Shear Versus Upper-Layer Shear.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(12),6265-6282. |
MLA | Fu, Hao,et al."Effect of Unidirectional Vertical Wind Shear on Tropical Cyclone Intensity Change-Lower-Layer Shear Versus Upper-Layer Shear".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.12(2019):6265-6282. |
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