1998-2008年阿克苏地区冰雹的时空分布特征及防御对策

统计分析了位于天山南麓的阿克苏地区1998--2008年的降雹资料，揭示了近年来地区降雹的时空分布特征以及冰雹云活动的主要路径，结果显示：该地区降雹分布为北部多、南部少，山区多、平原少；该地区降雹次数呈线性增加趋势，东部降雹次数多于西部、西部降雹次数增幅大于东部；由于冰雹云路径复杂多变，冰雹防御的重点在主要冰雹云路径和重点农作物区近年来新增的耕地面积成为防御的空白区，应增设作业点来填补空档区，达到“全覆盖”式作业体系

Temporal and Spatial Distribution Characteristics and Defensive Countermeasures of Hail from 1998 to 2008 in Akesu

Based on the hailfall data of eleven years from 1998 to 2008 of Akesu in south slope of Tianshan Mountains, we analyzed the temporal and spatial distribution characteristics and main paths distribution of hails in these years. The results showed that: the hailfall times are increasing; the hailfall times in the northern are more than those in the southern; the hailfall times of the mountainous area are more than those of the plain; the hailfall times in eastern are more than those in western part; the increased range is bigger in western than that in eastern. As the hailstone paths become complex and diversified, the focus of hail defense is in the main paths and the primary crop areas. The new cropland become to blank area of denfence in these years. Thus new operation point should be added to fill the gap and to develop a full-covered operating system.