摘要
根据 1 96 1～ 1 999年新疆 90个气象观测站的地面观测资料 ,统计分析了新疆冰雹的时空分布特征 ,并以分钟为单位给出冰雹的日变化和持续时间。新疆冰雹主要出现在西部和中部山区 ,集中出现在 4～ 1 0月。降雹一般出现在下午 ,傍晚是高峰期 ,有 6 0 %的冰雹持续时间在 6分钟以内。进一步普查 39年冰雹天气资料 ,得到 76次系统性冰雹天气过程和 1 2 79次局地冰雹天气过程 ,局地冰雹天气过程的发生远远多于系统性冰雹天气过程。冰雹天气过程与地形密切相关 ,主要发生在山区。冰雹天气过程以 1天为主 ,多发生于夏季 ,系统性冰雹天气过程均由中尺度高压造成。
The spatial temporal distribution of hail is analyzed based on the hail data from 1961 to 1999 at 90 weather stations in Xinjiang. The hail occurrence is more frequent in mountainous areas in the western and middle part of Xinjiang and concentrates in the period from April to October, and in most of the days in June. More hail occurs in afternoon and most in evening. The persistence time of most hail is within 6 minutes. The local hail (1279) was more than systematic hail (76) during 1961 to 1999. Hail weather processes were closely related to topography, mainly occurred in mountainous area. Hail weather mostly appeared only 1 day, mainly in summer. Systematic hail weather was caused by mesoscale high pressure.
出处
《气象》
CSCD
北大核心
2003年第11期25-28,共4页
Meteorological Monthly
基金
新疆维吾尔自治区气象局青年气象科研基金(塔额盆地冰雹天气诊断分析预报)资助
