| 刊名 | Meteorological and Environmental Research |
| 作者 | Xinyu CHEN1*, Nan ZHAO1, Wenying YU1, Chao FAN2 |
| 作者单位 | 1.Ulanqab Meteorological Bureau, Ulanqab 012000, China; 2. Huade Meteorological Bureau, Huade 013350, China |
| DOI | 10.19547/j.issn2152-3940.2024.02.001 |
| 年份 | 2024 |
| 刊期 | 2 |
| 页码 | 1-3,9 |
| 关键词 | Frontal zone; Subtropical high; Inverted trough; Frost; Ulanqab City |
| 摘要 | Based on the conventional observation data and NCEP/NCAR reanalysis data, the circulation situation, influencing systems and causes of the heavy rain during September 20-21, 2010 in Ulanqab City were analyzed from the evolution process of weather circulation situation and the changes of various physical quantity fields. The results show that there was an obvious frontal zone between 45-52° N, which brought strong cold air. The transport of warm and humid air outside the subtropical high and typhoon was the main water vapor source of the strong precipitation, and the southwest jet at 700 hPa transported abundant water vapor. There was a broad inverted trough to the south of 45° N, with a central value of 1 000.0 hPa. Ulanqab City was on the top of the inverted trough, stable and less moved, which was conducive to the occurrence of systematic heavy precipitation. The rainstorm was a strong precipitation process caused by the intersection of cold air brought by the southward movement of the upper frontal zone and warm and humid air outside the subtropical high. After the precipitation, the invasion of strong cold air brought frost and cold wave weather to Ulanqab City. |
