Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-16-0092.1 |
Mountain Waves, Downslope Winds, and Low-Level Blocking Forced by a Midlatitude Cyclone Encountering an Isolated Ridge | |
Menchaca, Maximo Q.; Durran, Dale R. | |
2017-02-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2017 |
卷号 | 74期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The interaction of a midlatitude cyclone with an isolated north-south mountain barrier is examined using numerical simulation. A prototypical cyclone develops from an isolated disturbance in a baroclinically unstable shear flow upstream of the ridge, producing a cold front that interacts strongly with the topography. The structure and evolution of the lee waves launched by the topography are analyzed, including their temporal and their north-south variation along the ridge. Typical mountain wave patterns are generated by a 500-m-high mountain, but these waves often exhibit significant differences from the waves produced in 2D or 3D simulations with steady large-scale-flow structures corresponding to the instantaneous conditions over the mountain in the evolving flow. When the mountain height is 2 km, substantial wave breaking occurs, both at low levels in the lee and in the lower stratosphere. Despite the north-south uniformity of the terrain profile, large north-south variations are apparent in wave structure and downslope winds. In particular, for a 24-h period beginning after the cold front passes the upstream side of the ridge toward the south, strong downslope winds occur only in the northern half of the lee of the ridge. Just prior to this period, the movement of the cold front across the northern lee slopes is complex and accompanied by a burst of strong downslope winds and intense vertical velocities. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394341100017 |
WOS关键词 | FROUDE-NUMBER ; FLOW ; DRAG ; SIMULATIONS ; TOPOGRAPHY ; MESOSCALE ; ROTATION |
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/29211 |
专题 | 地球科学 |
作者单位 | Univ Washington, Seattle, WA 98195 USA |
推荐引用方式 GB/T 7714 | Menchaca, Maximo Q.,Durran, Dale R.. Mountain Waves, Downslope Winds, and Low-Level Blocking Forced by a Midlatitude Cyclone Encountering an Isolated Ridge[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(2). |
APA | Menchaca, Maximo Q.,&Durran, Dale R..(2017).Mountain Waves, Downslope Winds, and Low-Level Blocking Forced by a Midlatitude Cyclone Encountering an Isolated Ridge.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(2). |
MLA | Menchaca, Maximo Q.,et al."Mountain Waves, Downslope Winds, and Low-Level Blocking Forced by a Midlatitude Cyclone Encountering an Isolated Ridge".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.2(2017). |
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