| 2012年呼伦贝尔市3次局地暴雨成因对比分析 |
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| 引用本文： | 王慧清.2012年呼伦贝尔市3次局地暴雨成因对比分析[J].内蒙古气象,2014(6):3-6. |
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| 作者姓名： | 王慧清 |
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| 作者单位： | 呼伦贝尔市气象局,内蒙古呼伦贝尔021008 |
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| 基金项目： | 2012年中国气象局预报员专项（CMAYBY2011006）资助 |
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| 摘 要： | 文章利用常规气象资料对2012年汛期(6—8月)呼伦贝尔市3次局地暴雨的成因做了对比分析。结果表明:3次局地暴雨过程的环流均为径向型,整个欧亚大陆槽脊分布较明显,乌拉尔山以东的阻塞高压、西来槽以及贝加尔湖冷涡为主要的影响系统;高空急流或最大风速带与低空急流或最大风速带形成耦合,对局地暴雨过程中水汽和热量的输送以及持续强烈的上升运动的维持起重要作用。3次过程中,在雨区上空都有充沛的水汽(比湿≥10g/kg)且有强的水汽辐合,但3次过程中,水汽源地和输送路径却不同;3次过程中,大气均处于上干下湿的不稳定层结状态中,但在不稳定指数及不稳定能量上却存在较大差别;3次过程中,雨区上空存在持续强烈的上升运动,为暴雨天气的产生和持续提供了有利的动力抬升条件;对于3次降雨过程,卫星云图和雷达回波图均有较好的指示作用。
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| 关 键 词： | 呼伦贝尔 局地暴雨 成因 对比分析 大兴安岭 |
Comparative Analysis on the Causes of Three Times Local Heavy Rain in 2012 in Hulun Beir City |
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| Authors: | Wang Huiqing |
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| Institution: | Wang Huiqing (Hulun Beir Meteorological Bureau, Inner Mongolia Hulun Beir 021008) |
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| Abstract: | This paper made a comparative analysis on the causes of three times local heavy rain process in 2012 flood season in Hulun Buir City using the conventional meteorological data. The results showed that the circulation of three times local heavy rain process were radial type, the distribution of trough and ridge was obvious in throughout Eurasia, blocking high at the East of the Ural Mountains, westerly trough and Lake Baikal cold vortex as a major influence system, the high-altitude jet stream or maximum wind band with the low-altitude jet stream or maximum wind band formed coupler to played an important role in transporting moisture and heat as well as maintaining continued strong upward motion during heavy rain. There had abundant water vapor（specific humidity ≥10g/kg） over the rain region and there was a strong moisture convergence, but vapor source and transport path was different, the at-mosphere was in a unstable stratification that was dry in upper layer and wet in down layer state, but there was a big difference on the instability index and unstable energy during the three times progress; over the rain there existed continued strong upward move-ment, and provided a favorable dynamic lifting conditions for producing and continuing of heavy rain during the three times progress.Satellite and Radar all had a better role of indication during the three times progress. |
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| Keywords: | Hulun Buir local heavy rain cause comparative analysis great khingan moutains |
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