Sprite observations in the Northern Territory of Australia
Sprite observations in the Northern Territory of Australia
复制标题
DOI：
10.1029/1999jd900325
复制
发表时间：
2000-02
影响因子：
--
通讯作者：
S. F. Hardman;R. Dowden;J. Brundell;J. L. Bahr;Z. Kawasaki;C. Rodger
中科院分区：
文献类型：
--
作者：
S. F. Hardman;R. Dowden;J. Brundell;J. L. Bahr;Z. Kawasaki;C. Rodger
在澳大利亚北领地的两台摄像机上观测到了雪晶，这是雷暴上空高层大气中一种短暂的发光放电形式。这是在美国以外进行的第一次地面观测。雪碧排放通常发生在50公里和80公里的高度之间，平均宽度为44公里。许多精灵事件的持续时间很长，平均为145毫秒。这些空间和时间的特点是从地面和空中在美国观察到的。在较长的事件中，观察到一些发光放电元素随着其他新元素的形成而衰变。由于新元素经常从旧元素中横向移位，精灵有时似乎在天空中跳舞。这种现象在科罗拉多被观察到，并被命名为“跳舞的精灵”。在北领地观察到的精灵元素的横向进展绝大多数是在一个方向上，覆盖的距离高达90公里。
Sprites, a form of brief luminous discharge in the upper atmosphere above a thunderstorm, were observed and imaged on two video cameras in Australia's Northern Territory. These were the first such ground-based observations made outside the United States. Sprite discharges typically took place between the altitudes of 50 km and 80 km and spanned an average width of 44 km. Many of the sprite events were of long duration, with an average of 145 ms. These spatial and temporal features were similar to those observed from the ground and the air in the United States. During the longer events, some luminous discharge elements were observed to decay as other new elements formed. As the new elements were often laterally displaced from the old, the sprites sometimes appeared to dance across the sky. This phenomenon has been observed in Colorado and named “dancing sprites.” The lateral progression of sprite elements observed in the Northern Territory was overwhelmingly in one direction and covered distances of up to 90 km.