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中文摘要: 通过对陕南两次特大暴雨发生时的主要影响系统、各种物理量场特征、卫星云图演变实况、地形特征等综合对比分析认为,这两次特大暴雨都是由副热带高压外围的SW气流输送大量水汽和不稳定能量,配合高空槽、切变线和低空急流影响产生的。冷锋或夜晚对流发展触发对流不稳定能量释放,产生强对流。特大暴雨产生在中低层对流不稳定、高能舌和低层暖平流、高层冷平流以及低层辐合、高层辐散的上升运动区。地形抬升和喇叭口地形效应也起了重要作用。
中文关键词: 特大暴雨，影响系统，物理量场特征，对比分析
Abstract:The main influential systems,various physical features and satellite im ages were synthetically contrastively analysed.Topographic features are also co nsulted.It is shown that the two torrential rain are all caused by plentiful m iosture and instability energy conveyed by the southwest airflow outside subtrop ical high,assorted with upper trough,shear line and low-level jet.The cold fron t (″7.9 torrential rain″) or development of convection at night (″7.13 to rrent ial rain″) triggered off convective instability energy and a stronger convectio n produced.Torrential rain located in the area with convective instability,high energy tongue at the middle-low level,warm advection convergence at the low lev el and divergence at the high level and ascending motion.Topographic lift and be ll-mouthed topographic effect also affected the torrential rain.
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基金项目:
| 作者 | 单位 |
| 赵世发 | 陕西省商洛地区气象局,商州 726000 |
| 王俊 | 陕西省商洛地区气象局,商州 726000 |
| 周军元 | 陕西省商洛地区气象局,商州 726000 |
| 孟明霞 | 陕西省商洛地区气象局,商州 726000 |
| 程路 | 陕西省商洛地区气象局,商州 726000 |
| 周丹 | 陕西省商洛地区气象局,商州 726000 |
| 高丽 | 陕西省商洛地区气象局,商州 726000 |
| Author Name | Affiliation |
引用文本：
赵世发,王俊,周军元,孟明霞,程路,周丹,高丽,2001.陕南两次罕见的特大暴雨对比分析[J].气象,27(10):28-32.
,2001.Contrast Analysis between two Rare Torrential Rains over the South of Shaanxi Province[J].Meteor Mon,27(10):28-32.
赵世发,王俊,周军元,孟明霞,程路,周丹,高丽,2001.陕南两次罕见的特大暴雨对比分析[J].气象,27(10):28-32.
,2001.Contrast Analysis between two Rare Torrential Rains over the South of Shaanxi Province[J].Meteor Mon,27(10):28-32.