Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-18-0037.1 |
Concentric Eyewall Formation in Typhoon Sinlaku (2008). Part III: Horizontal Momentum Budget Analyses | |
Huang, Yi-Hsuan1; Wu, Chun-Chieh1; Montgomery, Michael T.2 | |
2018-10-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
![]() |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2018 |
卷号 | 75期号:10页码:3541-3563 |
文章类型 | Article |
语种 | 英语 |
国家 | Taiwan; USA |
英文摘要 | This is a follow-up work to two prior studies examining secondary eyewall formation (SEF) in Typhoon Sinlaku (2008). This study shows that, in the SEF region, the majority of the elevated winds are supergradient. About two-thirds of the rapid increase in tangential wind tendencies immediately prior to SEF are attributed to agradient wind tendencies. This suggests the importance of nonlinear, unbalanced dynamical processes in SEF in addition to the classical axisymmetric balanced response to forcings of heating and momentum. In the SEF region, analyses show two distinct responsible processes for the increasing azimuthal tangential wind in two vertical intervals. Within the boundary inflow layer, the competing effect between the mean radial influx of absolute vorticity and deceleration caused by surface friction and subgrid diffusion yields a secondary maximum of positive tendency. Analyses further demonstrate the major impact of the mean radial influx of absolute vorticity on SEF. Above the boundary inflow layer, the vertical advection acts to vertically extend the tangential wind jet via the lofting of the enhanced tangential momentum farther upward. The roles of the nonlinear unbalanced dynamics in these two processes are discussed in this paper. From a Lagrangian perspective, the persistently increasing agradient force outweighs the frictional loss, effectively decelerating boundary layer inflowing air across the SEF region. This explains the sharpening of the radial gradient of boundary layer inflow, which is shown to be responsible for the buildup of a zone with concentrated boundary layer convergence. The previously proposed unbalanced dynamical pathway to SEF is elaborated upon and supported by the current results and discussion. |
英文关键词 | Hurricanes typhoons Tropical cyclones |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000444536400002 |
WOS关键词 | ENSEMBLE KALMAN FILTER ; VERTICAL WIND SHEAR ; TROPICAL CYCLONE INTENSIFICATION ; AXISYMMETRICAL BALANCE DYNAMICS ; SCALE DATA ASSIMILATION ; VORTEX ROSSBY-WAVES ; HURRICANE RITA 2005 ; SECONDARY EYEWALL ; REPLACEMENT CYCLES ; BOUNDARY-LAYER |
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/29217 |
专题 | 地球科学 |
作者单位 | 1.Natl Taiwan Univ, Dept Atmospher Sci, Taipei, Taiwan; 2.Naval Postgrad Sch, Dept Meteorol, Monterey, CA USA |
推荐引用方式 GB/T 7714 | Huang, Yi-Hsuan,Wu, Chun-Chieh,Montgomery, Michael T.. Concentric Eyewall Formation in Typhoon Sinlaku (2008). Part III: Horizontal Momentum Budget Analyses[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2018,75(10):3541-3563. |
APA | Huang, Yi-Hsuan,Wu, Chun-Chieh,&Montgomery, Michael T..(2018).Concentric Eyewall Formation in Typhoon Sinlaku (2008). Part III: Horizontal Momentum Budget Analyses.JOURNAL OF THE ATMOSPHERIC SCIENCES,75(10),3541-3563. |
MLA | Huang, Yi-Hsuan,et al."Concentric Eyewall Formation in Typhoon Sinlaku (2008). Part III: Horizontal Momentum Budget Analyses".JOURNAL OF THE ATMOSPHERIC SCIENCES 75.10(2018):3541-3563. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论