Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-10349-2017 |
The genesis of Hurricane Nate and its interaction with a nearby environment of very dry air | |
Rutherford, Blake1; Dunkerton, Timothy1; Montgomery, Michael2; Braun, Scott3 | |
2017-09-04 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:17 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The interaction of a tropical disturbance with its environment is thought to play an important role in whether a disturbance will develop or not. Most developing disturbances are somewhat protected from the intrusion of environmental dry air at mid-levels. For African easterly wave (AEW) disturbances, the protective boundary is approximated by closed streamlines in the wave-relative frame, and their interior is called the wave pouch. The dynamic and thermodynamic processes of spin-up occur inside the pouch. In this study, we define the kinematic boundaries for a non-AEW disturbance in the Bay of Campeche that originated along a sharp frontal boundary in a confluent region of low pressure. We examine these boundaries during the genesis of Hurricane Nate (2011) to show how a pouch boundary on isobaric levels in the Lagrangian frame may allow for some transport into the pouch along the frontal boundary while still protecting the innermost development region. This result illustrates a generic property of weakly unsteady flows, including the time-dependent critical layer of AEWs, that lateral exchange of air occurs along a segment of the boundary formed by the instantaneous, closed translating streamlines. Transport in the Lagrangian frame is simplest when measured with respect to the stable and unstable manifolds of a hyperbolic trajectory, which are topologically invariant. In this framework, an exact analysis of vorticity transport identifies the primary source as the advection of vorticity through the entrainment and expulsion of bounded material regions called lobes. We also show how these Lagrangian boundaries impact the concentration of moisture, influence convection, and contribute to the pouch vertical structure. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000409121500003 |
WOS关键词 | LAGRANGIAN TRANSPORT ; HYPERBOLIC TRAJECTORIES ; COHERENT VORTICES ; FLUID EXCHANGE ; LOBE DYNAMICS ; OCEAN MODELS ; SYSTEMS ; FLOWS ; EVOLUTION |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; 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/20606 |
专题 | 地球科学 |
作者单位 | 1.Northwest Res Assoc, Redmond, WA 98052 USA; 2.Naval Postgrad Sch, Dept Meteorol, Monterey, CA USA; 3.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA |
推荐引用方式 GB/T 7714 | Rutherford, Blake,Dunkerton, Timothy,Montgomery, Michael,et al. The genesis of Hurricane Nate and its interaction with a nearby environment of very dry air[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(17). |
APA | Rutherford, Blake,Dunkerton, Timothy,Montgomery, Michael,&Braun, Scott.(2017).The genesis of Hurricane Nate and its interaction with a nearby environment of very dry air.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(17). |
MLA | Rutherford, Blake,et al."The genesis of Hurricane Nate and its interaction with a nearby environment of very dry air".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.17(2017). |
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