关键词: 强冰雹, 影响系统, 探空物理量参数, 阿克苏

Abstract: Temporal variation and spatial distribution characteristics of severe hail events in Aksu, Xinjiang, China during 1961—2010 were investigated, and climate systems and circulation situations resulting in severe hail events were also analyzed from aspect of weather forecast. The results show that severe hail events in Aksu appear an increasing trend, and local severe hail events are obviously more than systemic severe hail events. Severe hail events mainly occur from April to October, and the high-frequency period is from May to July. Main climatic systems and circulation situations resulting in severe hail events can be classified into 4 types, and low pressure systems of the Balkhash Lake and Middle Asia are the most important systems. In this paper, the geographical distribution characteristics of severe hail events were concluded, and a pre-warning index system of sounding physical parameters for severe hail events were also given.

Key words: severe hail, effect system, sounding physical parameter, Aksu