A Modeling Study on the Mechanism of Convective Initiation of a Squall Line over Northeastern China
文献类型：期刊论文
| 作者 | Zhang Zhe1; Zhou Yu-shu2; Deng Guo3 |
| 刊名 | JOURNAL OF TROPICAL METEOROLOGY
 |
| 出版日期 | 2020-09-01 |
| 卷号 | 26期号:3页码:336-347 |
| 关键词 | squall line convective initiation vortices |
| ISSN号 | 1006-8775 |
| DOI | 10.46267/j.1006-8775.2020.030 |
| 通讯作者 | Zhou Yu-shu(zys@mail.iap.ac.cm) |
| 英文摘要 | High-resolution numerical simulation results of a squall line initiated along a convergence zone in northeast China on 26 June 2014 were presented in this study. The simulation was performed by a convection-permitting model with coarse and fine grids of 4 and 1.33 kin, respectively, and the simulation results were validated against the observation. Results showed that the simulation adequately reproduced the life cycle of the squall line, which allowed detailed investigation of the mechanism of convective initiation in this case. The synoptic condition was favorable for convective initiation and the convection was triggered in a convergence zone, where a branch of dry and cold air and a branch of moist and warm air collided. The water vapor flux divergence was inhomogeneous and some cores of water vapor convergence existed in the convergence zone. These cores were the spots where water vapor converged intensely and the air there was forced to rise, creating favorable spots where the convection was initially triggered. A series of quasi-equally spaced vortices near the surface, which themselves were the result of horizontal shear instability, were accountable for the inhomoEeneity of the surface water vapor flux divergence. These vortices rotated the moist air into their north and dry air into their south, thus creating more favorable spots for convective initiation in their north. After initiation, the updraft turned the horizontal vorticity into vertical vorticity in the mid-level. The vortices near the surface collaborated with the vorticity maxima in the mid-level and enhanced the development of convection by providing water vapor. |
| WOS关键词 | INTERACTING THUNDERSTORM OUTFLOWS ; BOUNDARY-LAYER ; PART I ; NUMERICAL-SIMULATION ; JUNE 2002 ; DRYLINE ; IHOP ; PRECIPITATION ; EVOLUTION ; MOISTURE |
| 资助项目 | National Natural Science Foundation of China[41975137] ; National Natural Science Foundation of China[41875074] ; National Natural Science Foundation of China[41475054] ; National Natural Science Foundation of China[41875056] |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000573414400008 |
| 出版者 | JOURNAL OF TROPICAL METEOROLOGICAL PRESS |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/157017]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Zhou Yu-shu |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 2.Chinese Acad Sci, Inst Atmospher Phys, Key Lab Cloud Precipitat Phys & Severe Storms, Beijing 100029, Peoples R China 3.Natl Meteorol Ctr, Beijing 100081, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang Zhe,Zhou Yu-shu,Deng Guo. A Modeling Study on the Mechanism of Convective Initiation of a Squall Line over Northeastern China[J]. JOURNAL OF TROPICAL METEOROLOGY,2020,26(3):336-347. |
| APA | Zhang Zhe,Zhou Yu-shu,&Deng Guo.(2020).A Modeling Study on the Mechanism of Convective Initiation of a Squall Line over Northeastern China.JOURNAL OF TROPICAL METEOROLOGY,26(3),336-347. |
| MLA | Zhang Zhe,et al."A Modeling Study on the Mechanism of Convective Initiation of a Squall Line over Northeastern China".JOURNAL OF TROPICAL METEOROLOGY 26.3(2020):336-347. |
入库方式： OAI收割
来源：地理科学与资源研究所
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