A study of richardson number and instability in moist saturated flow
文献类型：期刊论文
| 作者 | Yang Shuai; Gao Shou-Ting; Wang Dong-Hai |
| 刊名 | Chinese journal of geophysics-chinese edition
 |
| 出版日期 | 2007-03-01 |
| 卷号 | 50期号:2页码:377-386 |
| 关键词 | Richardson number Precipitation Instability Modification Ri equation |
| ISSN号 | 0001-5733 |
| 通讯作者 | Yang shuai(ys_ys@126.com) |
| 英文摘要 | We have derived the ri equations in dry and moist saturated flow in the atmosphere. a rainfall case which occurred in northern china is numerically simulated, and the model output data is used to calculate and analyze comparatively the terms of ri equations in dry air and moist saturated flow. the analysis shows that the vertical shear of horizontal velocity dominates the influence on ri change and instability in dry process, whereas in the moist case, the influence of numerator of ri (i.e., brunt-vaisala frequency, named bvf) on ri change and instability can reach up to the same magnitude order as the denominator of ri. since bvf has very important influence on instability in the moist case, we have looked for the expression of bvf which is more appropriate for the real moist case. thus ri is modified, so that we can estimate instability in the moist process. it is found that, due to considering the virtual temperature effect and the change of total water mixing ratio (i.e., part liquid water is dropped out the parcel), the stability in the rainy region is effectively decreased. therefore, the modified moist ri formula may be more appropriate to diagnose the instability in rainy regions. |
| WOS关键词 | LAYER ; STABILITY ; MODEL ; SHEAR |
| WOS研究方向 | Geochemistry & Geophysics |
| WOS类目 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000245399900007 |
| 出版者 | SCIENCE CHINA PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2383349 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Yang Shuai |
| 作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, Beijing 100029, Peoples R China 2.Grad Univ, Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Meteorol Sci, Beijing 100081, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang Shuai,Gao Shou-Ting,Wang Dong-Hai. A study of richardson number and instability in moist saturated flow[J]. Chinese journal of geophysics-chinese edition,2007,50(2):377-386. |
| APA | Yang Shuai,Gao Shou-Ting,&Wang Dong-Hai.(2007).A study of richardson number and instability in moist saturated flow.Chinese journal of geophysics-chinese edition,50(2),377-386. |
| MLA | Yang Shuai,et al."A study of richardson number and instability in moist saturated flow".Chinese journal of geophysics-chinese edition 50.2(2007):377-386. |
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来源：中国科学院大学
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