The Characteristics of Lightning Occurrence in Southern Germany
The Characteristics of Lightning Occurrence in Southern Germany
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发表时间：
1996
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通讯作者：
U. Finke;T. Hauf
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文献类型：
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作者：
U. Finke;T. Hauf
首次研究了德国南部闪电的时空分布。数据取自新安装的闪电定位系统（LPATS）。数据库涵盖1992-1994年。在500 km × 430 km的观测区域内，平均每年观测到63.4万次云地闪电。这相当于闪电频率为每分钟1.2次，空间密度为2.8 yr-1 km-2。大多数闪电事件仅限于夏季5月至8月，平均每年有29个雷暴日。闪电活动的日周期在当地时间1600-1700达到峰值，随后缓慢下降，在早晨达到最低值。一个次极大值出现在2100和2200之间，这是来自遥远雷暴源区的传播效应。闪电的空间分布证实了众所周知的某些地区对雷暴发展的偏好。这些首选地区是黑森林的背风面，阿尔高和阿尔卑斯山前陆的其他部分。这里可能发生超过10年-1km-2的闪电密度。与常规收集的雷暴数据的比较产生了很好的协议。
For the first time, the temporal and spatial distributions of lightning in southern Germany are studied. Data is taken from a newly installed lightning location system (LPATS). The data base covers the years 1992-1994. Inside the observational are of 500 km × 430 km a mean value of 634,000 cloud-to-ground lightning strokes per year is detected. This corresponds to a lightning frequency of 1.2 per minute and a spatial density of 2.8 yr -1 km -2 . Most of the lightning events are confined to the summer months May-August with a mean number of 29 thunderstorm days per year. The diurnal cycle of lightning activity peaks at 1600-1700 local time with a subsequent slow decrease towards the minimum in the morning hours. A secondary maximum is found between 2100 and 2200 which is shown to be a propagation effect from distant thunderstorm source areas. The spatial lightning distribution confirms the well-known preference of certain areas for the development of thunderstorms. Such preferred areas are the leeward side of the Black Forest, the Allgau and other parts of the Alpine foreland. Here lightning densities of more than 10 yr -1 km -2 may occur. A comparison with routinely gathered thunderstorm data yields a good agreement.