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DOI | 10.1175/JAS-D-16-0328.1 |
Formation of Long-Lived Summertime Mesoscale Vortices over Central East China: Semi-Idealized Simulations Based on a 14-Year Vortex Statistic | |
Fu, Shen-Ming1; Sun, Jian-Hua2,3; Luo, Ya-Li3; Zhang, Yuan-Chun2 | |
2017-12-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2017 |
卷号 | 74期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Regions around Dabie Mountain (DBM) in the Yangtze River basin (YRB) are the source of a mesoscale vortex: the Dabie vortex (DBV). Based on a 14-yr statistical study, 11 long-lived heavy-rain-producing DBVs were composited for convection-permitting semi-idealized simulations. A control simulation, initialized 12 h before the composite vortex formation, successfully reproduced a DBV, with all the salient characteristics of the 11 events. Sensitivity experiments were designed to understand the impacts of large-scale environmental conditions, regional topography, and latent heating on DBV formation. The main results were as follows: (i) Supposition of a 500-hPa shortwave trough with an east-west-oriented lower-level transversal trough around the DBM is crucial for the formation of vortices. A nocturnal lower-level jet on the southern side of the transversal trough accelerates DBV formation by enhancing convergence, triggering/sustaining convection, and producing cyclonic vorticity. (ii) During the simulation period, the topography east of the second-step mountain ranges, including the DBM, significantly affects nearby precipitation and convective activity, whereas this is not crucial for DBV formation, (iii) Latent heating is not required for generating DBVs, but it enhances the intensity, longevity, and eastward progression of these vortices along the shear line associated with the transversal trough, (iv) The vorticity budget suggests the convergence-related (horizontal) shrinking and vertical transport dominate the cyclonic-vorticity increase associated with DBVs, whereas tilting and horizontal transport mainly act in the opposite manner. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000418533900006 |
WOS关键词 | LEVEL JET ; PART I ; CONVECTIVE VORTICES ; MIDLATITUDE ; CLIMATOLOGY ; MODEL ; EQUATION ; PLATEAU ; SYSTEM |
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/29364 |
专题 | 地球科学 |
作者单位 | 1.Chinese Acad Sci, Int Ctr Climate & Environm Sci, Inst Atmospher Phys, Beijing, Peoples R China; 2.Chinese Acad Sci, Lab Cloud Precipitat Phys & Severe Storms, Inst Atmospher Phys, Beijing, Peoples R China; 3.Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Fu, Shen-Ming,Sun, Jian-Hua,Luo, Ya-Li,et al. Formation of Long-Lived Summertime Mesoscale Vortices over Central East China: Semi-Idealized Simulations Based on a 14-Year Vortex Statistic[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(12). |
APA | Fu, Shen-Ming,Sun, Jian-Hua,Luo, Ya-Li,&Zhang, Yuan-Chun.(2017).Formation of Long-Lived Summertime Mesoscale Vortices over Central East China: Semi-Idealized Simulations Based on a 14-Year Vortex Statistic.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(12). |
MLA | Fu, Shen-Ming,et al."Formation of Long-Lived Summertime Mesoscale Vortices over Central East China: Semi-Idealized Simulations Based on a 14-Year Vortex Statistic".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.12(2017). |
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