LIGHTNING IN VOLCANIC CLOUDS
LIGHTNING IN VOLCANIC CLOUDS
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DOI：
10.1029/jc079i003p00472
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发表时间：
1974-01-01
影响因子：
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通讯作者：
SIGURGEIRSSON, T
中科院分区：
文献类型：
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作者：
BROOK, M;MOORE, CB;SIGURGEIRSSON, T
正电荷被熔融熔岩与海水接触时形成的云带到高处，因此正电位梯度值有时超过7000 V/m。闪电经常发生，与更猛烈的蒸汽喷发有关;它们有效地将正电荷在单次撞击中降低到地球上，显然是在与正常雷暴中观察到的极性相反的单元素放电中。从电位梯度变化的形状和延时照片中推断，电荷似乎分布在一个垂直柱中，从海上向上延伸到不超过100米的高度。
Positive charge is carried aloft by the clouds formed when molten lava comes in contact with seawater, and thus positive potential gradient values sometimes exceed 7000 V/m. Lightning flashes often occur, associated with the more violent steam eruptions; they effectively lower positive charge to earth in single strokes, apparently in single element discharges that are opposite the polarity of those observed in normal thunderstorms. As was inferred from the shape of the potential gradient changes and from time‐lapse photographs, the charge appeared to be distributed in a vertical column extending upward from the sea to a height not exceeding about 100 m.