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DOI | 10.1175/JAS-D-19-0093.1 |
Unusual Trapped Mountain Lee Waves with Deep Vertical Penetration and Significant Stratospheric Amplitude | |
Metz, Johnathan J.; Durran, Dale R.; Blossey, Peter N. | |
2020-02-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2020 |
卷号 | 77期号:2页码:633-646 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Simulations of the weather over the South Island of New Zealand on 28 July 2014 reveal unusual wave activity in the stratosphere. A series of short-wavelength perturbations resembling trapped lee waves were located downstream of the topography, but these waves were in the stratosphere, and their crests were oriented north-south, in contrast to both the northeast-southwest orientation of the spine of the Southern Alps and the crests of trapped waves present in the lower troposphere. Vertical cross sections through these waves show a nodal structure consistent with that of a higher-order trapped-wave mode. Eigenmode solutions to the vertical structure equation for two-dimensional, linear, Boussinesq waves were obtained for a horizontally homogeneous sounding representative of the 28 July case. These solutions include higher-order modes having large amplitude in the stratosphere that are supported by just the zonal wind component. Two of these higher-order modes correspond to trapped waves that develop in an idealized numerical simulation of the 28 July 2014 case. These higher-order modes are trapped by very strong westerly winds in the midstratosphere and are triggered by north-south-oriented features in the subrange-scale topography. In contrast, the stratospheric cross-mountain wind component is too weak to trap similar high-order modes with crest-parallel orientation. |
英文关键词 | Mountain waves Orographic effects Topographic effects Waves atmospheric |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000510219700001 |
WOS关键词 | 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/280280 |
专题 | 地球科学 |
作者单位 | Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA |
推荐引用方式 GB/T 7714 | Metz, Johnathan J.,Durran, Dale R.,Blossey, Peter N.. Unusual Trapped Mountain Lee Waves with Deep Vertical Penetration and Significant Stratospheric Amplitude[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2020,77(2):633-646. |
APA | Metz, Johnathan J.,Durran, Dale R.,&Blossey, Peter N..(2020).Unusual Trapped Mountain Lee Waves with Deep Vertical Penetration and Significant Stratospheric Amplitude.JOURNAL OF THE ATMOSPHERIC SCIENCES,77(2),633-646. |
MLA | Metz, Johnathan J.,et al."Unusual Trapped Mountain Lee Waves with Deep Vertical Penetration and Significant Stratospheric Amplitude".JOURNAL OF THE ATMOSPHERIC SCIENCES 77.2(2020):633-646. |
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