Characteristics of Upward Bipolar Lightning Derived from Simultaneous Recording of Electric Current and Electric Field Change
Characteristics of Upward Bipolar Lightning Derived from Simultaneous Recording of Electric Current and Electric Field Change
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发表时间：
2008
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通讯作者：
Daohong Wang;N. Takagi
中科院分区：
文献类型：
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作者：
Daohong Wang;N. Takagi
本文通过同时记录三个向上双极闪电的电流和电场变化，报告了向上双极闪电的特征。这些特点包括：（1）虽然双极闪电中的正放电降低到地面的电荷与负放电降低到地面的电荷相当，但前者引起的电场变化大约比后者小一个数量级； (2) 3次双极闪电放电中的正负放电电流上升时间均在1 ms左右； (3)在后期反转极性放电电流开始上升之前约1ms，观察到一系列规则的电场变化脉冲。根据这些观察到的特征，提出了双极闪电的可能场景，以了解双极闪电是如何发生的。
This paper reports the characteristics of upward bipolar lightning derived from simultaneous recordings of electric current and electric field change of three upward bipolar lightning. These characteristics include (1) although the charge lowered to ground by the positive discharge contained in a bipolar lightning is comparable to that lowered by the negative discharge, the electric field change caused by the former is about one order in magnitude smaller than that of the latter; (2) both negative and positive discharges in three bipolar lightning discharges exhibited an electric-currentrise time of around 1 ms; (3) a series of regular pulses in electric field changes are observed about 1 ms before the later part reversal polarity discharge current begins to rise. Based on these observed characteristics, a possible scenario of bipolar lightning is proposed to understand how a bipolar lightning occurs.