| 青海冷湖一次极值大雨过程分析 |
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| 引用本文： | 石秀云,李生辰.青海冷湖一次极值大雨过程分析[J].安徽农业科学,2012,40(4):2268-2272. |
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| 作者姓名： | 石秀云 李生辰 |
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| 作者单位： | 1. 青海省格尔木市气象局,青海格尔木816000;青海省防灾减灾重点实验室,青海西宁810001
2. 青海省气象台,青海西宁,810001 |
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| 摘 要： | 目的]分析青海冷湖2011年6月15日极值大雨的降雨过程及形成原因。方法]对冷湖一次极值大雨过程的天气形势、物理量场及卫星云图资料进行分析。结果]河套"歪脖子"高压的形成,一方面构成了典型的青海强降水环流形势,另一方面形成了西南、东南两支水汽输送气流,同时巴尔喀什湖低槽分裂的小槽与高原低涡相交绥,造成了冷湖此次极值大雨天气。700 hPa热低压的存在,有利于低层能量的积累和低层水汽从青海偏南地区输送到柴达木盆地。结论]对流层中低层辐合、高层辐散和高湿度区以及强烈的垂直上升运动的维持是产生冷湖这次大雨天气过程的主要原因。
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| 关 键 词： | 冷湖 大雨极值 物理量场 诊断分析 |
Analysis of the Process of Extreme Heavy Rainfall in the Cold Lake in Qinghai |
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| Institution: | SHI Xiu-yun et al(Qinghai Golmud City Meteorological Bureau,Golmud,Qinghai 816000) |
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| Abstract: | Objective]The aim was to analyze the process and reason of the extreme heavy rainfall on June 15,2011 in Cold Lake in Qinghai.Method]The weather,physical field and satellite of one extreme heavy rain in the Cold Lake in Qinghai were expounded.Result]The formation of the Loop "crooked neck" of high pressure,which on the one hand posed a typical situation in the circulation of heavy precipitation in Qinghai,and on the other hand,formed the southwest,southeast of the two water vapor transport in air,in addition to the small groove from the trough of Lake Balk hash and the split vortex plateau combined,resulted into the extreme heavy rainfall in Cold Lake.The presence of thermal low pressure 700 hPa was conducive to the accumulation of low energy and low-level moisture transport from the Qinghai region to the south of Qaidam Basin.Conclusion]The resulting process was mainly due to heavy rain in the lower troposphere convergence,high-level divergence,high humidity areas and a strong vertical upward motion. |
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| Keywords: | Cold Lake Extreme value of heavy rain Physical quantity field Diagnosis |
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