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DOI | 10.1029/2019JD030631 |
The Evolution and Role of Midtropospheric Cyclonic Vortex in the Formation of Super Typhoon Nepartak (2016) | |
Wu, Shenglan; Fang, Juan | |
2019-08-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:16页码:9277-9298 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Based on a successful cloud-resolving simulation with the Weather Research and Forecasting Model, this study examines the evolution and the role of midtropospheric mesoscale cyclonic vortex in the formation of Super Typhoon Nepartak (2016). The midtropospheric vortex is correlated with the convective activity in pre-Nepartak. Once the deep convection outbreaks, the midtropospheric vortex intensifies first via the vertical advection associated with the severe updrafts and then through the midlevel convergence associated with stratiform precipitation. As the stratiform precipitation dissipates, the midlevel vortex weakens slightly in the following shallow convection phase. The above-described processes recur sequentially during the pregenesis of Nepartak, and the midtropospheric vortex demonstrates diurnal variations. Its intensification usually corresponds to the weakening of low-level cyclonic circulation except for the deep convection phase, indicating that the development of midtropospheric vortex can inhibit the development of self-sustained low-level cyclonic circulation. Although the midtropospheric vortex is not always a quasi-balanced perturbation, a cold core can be found in the lower troposphere below it during the most of the pregenesis stage. The appearance of the cold core enhances the low-level temperature gradient around it, which favors convection burst. In addition, the closed cyclonic circulation associated with the midlevel vortex can serve as a pouch protecting the vorticity, moisture, and convection inside from the vertical wind shear and dry air intrusion when the low-level and midlevel vortices are overlapped in the late pregenesis stage, which facilitates the sustained deep convection and the formation of Nepartak. |
英文关键词 | tropical cyclone cyclogenesis midtropospheric cyclonic vortex |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000490762800022 |
WOS关键词 | TROPICAL CYCLOGENESIS ; PART I ; NWP SYSTEM ; MESOSCALE ; GENESIS ; MODEL ; LAYER ; WAVE ; PRECIPITATION ; VORTICITY |
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/186158 |
专题 | 气候变化 |
作者单位 | Nanjing Univ, Sch Atmospher Sci, Key Lab Mesoscale Severe Weather MOE, Nanjing, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Wu, Shenglan,Fang, Juan. The Evolution and Role of Midtropospheric Cyclonic Vortex in the Formation of Super Typhoon Nepartak (2016)[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(16):9277-9298. |
APA | Wu, Shenglan,&Fang, Juan.(2019).The Evolution and Role of Midtropospheric Cyclonic Vortex in the Formation of Super Typhoon Nepartak (2016).JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(16),9277-9298. |
MLA | Wu, Shenglan,et al."The Evolution and Role of Midtropospheric Cyclonic Vortex in the Formation of Super Typhoon Nepartak (2016)".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.16(2019):9277-9298. |
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