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- Title
Analysis of a Rare Heavy Rain Weather Process in Autumn in Ulanqab City.
- Authors
Xinyu CHEN; Nan ZHAO; Wenying YU; Olao FAN
- Abstract
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 transp01t 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.
- Subjects
RAINFALL; RAINSTORMS; WEATHERING; COLD waves (Meteorology); WATER vapor transport; AUTUMN
- Publication
Meteorological & Environmental Research, 2024, Vol 15, Issue 2, p1
- ISSN
2152-3940
- Publication type
Article
- DOI
10.19547/j.issn2152-3940.2024.02.001