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DOI | 10.1175/JAS-D-19-0005.1 |
Investigation of Orographic Precipitation over an Isolated, Three-Dimensional Complex Topography with a Dense Gauge Network, Radar Observations, and Upslope Model | |
Cheng, Lin-Wen; Yu, Cheng-Ku | |
2019-11-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2019 |
卷号 | 76期号:11页码:3387-3409 |
文章类型 | Article |
语种 | 英语 |
国家 | Taiwan |
英文摘要 | This study uses a dense rain gauge network, radar observations, and an upslope model to document the detailed aspects of precipitation over Da-Tun Mountain (DT) of northern Taiwan under prevailing northeasterly monsoonal flow. DT is one of the most concentrated areas of heavy rainfall in Taiwan, with a size of similar to 15 km and a terrain peak of similar to 1 km (MSL), and it constitutes a concave ridge with two windward ridge arms that encompass a funnel-shaped valley. Twenty-one rainfall events identified over DT from January 2011 to February 2015 are chosen for analysis. More than half of the studied cases exhibit two local maxima of rainfall over the ridge arms, and asymmetric characteristics between these two maxima are evident. The other frequent rainfall pattern, observed as upstream winds are more from the east-northeast, is characterized by a local maximum of precipitation inside the valley. Analyses from the upslope model confirm that the occurrence of the windward maxima of rainfall is primarily caused by upslope lifting, and their asymmetric characteristics are closely related to the difference in the azimuthal variations of slope steepness between the two ridge arms. The observed characteristics of rainfall intensities inside the valley, however, cannot be well described by the upslope model. It is found that the lateral flow confluence induced by the deflected flows over the ridge arms may play an essential role in intensifying upslope-forced precipitation within the valley. This effect emerges as upstream winds are roughly parallel to the central axis of funneling regions located between the ridge arms. |
英文关键词 | Topographic effects Rainfall Valley mountain flows Mesoscale processes |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000490978000001 |
WOS关键词 | FROUDE-NUMBER ; DIAGNOSTIC MODEL ; TERRAIN GEOMETRY ; CONVECTIVE LINES ; DOPPLER RADAR ; PART I ; RAINFALL ; FLOW ; TAIWAN ; MOUNTAINS |
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/188136 |
专题 | 地球科学 |
作者单位 | Natl Taiwan Univ, Dept Atmospher Sci, Taipei, Taiwan |
推荐引用方式 GB/T 7714 | Cheng, Lin-Wen,Yu, Cheng-Ku. Investigation of Orographic Precipitation over an Isolated, Three-Dimensional Complex Topography with a Dense Gauge Network, Radar Observations, and Upslope Model[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2019,76(11):3387-3409. |
APA | Cheng, Lin-Wen,&Yu, Cheng-Ku.(2019).Investigation of Orographic Precipitation over an Isolated, Three-Dimensional Complex Topography with a Dense Gauge Network, Radar Observations, and Upslope Model.JOURNAL OF THE ATMOSPHERIC SCIENCES,76(11),3387-3409. |
MLA | Cheng, Lin-Wen,et al."Investigation of Orographic Precipitation over an Isolated, Three-Dimensional Complex Topography with a Dense Gauge Network, Radar Observations, and Upslope Model".JOURNAL OF THE ATMOSPHERIC SCIENCES 76.11(2019):3387-3409. |
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