| 刊名 | Meteorological and Environmental Research |
| 作者 | Xiufang ZHANG1, Wan GONG2*, Shuxuan HE2, Yuehua LU2 |
| 作者单位 | 1.Yunnan Meteorological Service Center, Kunming 650034, China; 2. Dehong Prefecture Meteorological Observatory, Mangshi 678400, China |
| DOI | 10.19547/j.issn2152-3940.2026.01.017 |
| 年份 | 2026 |
| 刊期 | 1 |
| 页码 | 75-91 |
| 关键词 | Southwest airflow; Low-level jet; Warm-sector rainstorm; Dehong |
| 摘要 | Based on conventional meteorological observation data, radar data and numerical forecast product data, the causes of the first large-scale, high-intensity and long-duration rainstorm in Dehong Prefecture during May 11-16, 2022 were analyzed by using the weather dynamic diagnosis and analysis method. The results show that the rainstorm process was caused by strong uplift and condensation in the west and north of Yingjiang under the background of dry and cold northwest air circulation at 500 hPa, no obvious influence of the south branch trough at 700 hPa, and strong southwest jet at 850 hPa. The southwest jet in the boundary layer provided sufficient warm water vapor, unstable energy and uplifting conditions for the rainstorm. Low-level convergence, high-level divergence and strong upward movement in the whole layer were conducive to the uplift and condensation of a large number of warm and humid air in the northwest of Yingjiang in Dehong Prefecture, which enhanced the development of mesoscale convective system (MCS) and prolonged the life history of β mesoscale convective system. The application of satellite, radar and other mesoscale data has an important reference value for the tracking, correction, forecast and early warning of the rainstorm process. |
