| Total deformation and its role in heavy precipitation events associated with deformation-dominant flow patterns | |
| Gao Shouting1; Yang Shuai1,2; Xue Ming3,4; Cui Chunguang5 | |
| 刊名 | Advances in atmospheric sciences
 |
| 2008 | |
| 卷号 | 25期号:1页码:11-23 |
| 关键词 | Deformation Confluence Precipitation Equation |
| ISSN号 | 0256-1530 |
| DOI | 10.1007/s00376-008-0011-y |
| 通讯作者 | Gao shouting(gst@lasg.iap.ac.cn) |
| 英文摘要 | In this paper, it is elucidated that the total deformation (td), defined as the square root of the sum of squared stretching deformation and squared shearing deformation, is an invariant independent of the coordinate system used. an idealized flow field is then constructed to demonstrate the confluence effect of a non-divergent and irrotational deformation field on moisture transport. to explore the characteristics and role of td, one heavy rainfall case that occurred in the middle and lower reaches of the yangtze river (mryr) over china, associated with a front with shear line, is analyzed using the weather research and forecasting (wrf) model output data. it is found that right before the occurrence of precipitation, the effect of the confluence induced by deformation on moisture transport provides a favorable condition for precipitation. during the precipitation, both location and orientation of the zone of large td coincide with the confluent shear line. the rainbands are nearly parallel with, and located lightly to the south of the zones of large td and the confluent shear line. the td in the lower troposphere increases in value as precipitation persists. when td approaches its maximal value, the next 6-hour precipitation reaches its peak correspondingly. a tendency equation for td is derived. the analysis of linear correlation and rms difference between individual terms in the total deformation equation and the sum of the terms shows that the pressure gradient plays a major role in determining the local change of total deformation. |
| WOS关键词 | SIMULATED CONVECTIVE STORMS ; BIG THOMPSON ; MODEL ; PROPAGATION ; ENERGETICS ; HELICITY |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| WOS类目 | Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| 出版者 | SCIENCE CHINA PRESS |
| WOS记录号 | WOS:000252345700002 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2385131 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Gao Shouting |
| 作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, Lab Cloud Precipitat Phys & Severe Storms LACS, Beijing 100029, Peoples R China 2.Grad Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Oklahoma, Sch Meteorol, Norman, OK USA 4.Univ Oklahoma, Ctr Anal & Predict Storms, Norman, OK USA 5.CMA, Inst Heavy Rain, Wuhan 430074, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao Shouting,Yang Shuai,Xue Ming,et al. Total deformation and its role in heavy precipitation events associated with deformation-dominant flow patterns[J]. Advances in atmospheric sciences,2008,25(1):11-23. |
| APA | Gao Shouting,Yang Shuai,Xue Ming,&Cui Chunguang.(2008).Total deformation and its role in heavy precipitation events associated with deformation-dominant flow patterns.Advances in atmospheric sciences,25(1),11-23. |
| MLA | Gao Shouting,et al."Total deformation and its role in heavy precipitation events associated with deformation-dominant flow patterns".Advances in atmospheric sciences 25.1(2008):11-23. |
| 个性服务 |
| 查看访问统计 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
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