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首页> 外文期刊>Journal of Geophysical Research, D. Atmospheres: JGR >Velocities of Positive Leaders in Intracloud and Negative Cloud-to-Ground Lightning Flashes
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Velocities of Positive Leaders in Intracloud and Negative Cloud-to-Ground Lightning Flashes

机译：颅内和负云到地闪电闪电速度的频率速度

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摘要

We have performed a statistical study on velocities of positive leaders in 553 intracloud (IC) and 220 negative cloud-to-ground (-CG) flashes. It is found that velocities of positive leaders in IC and -CG flashes have very similar distributions, with the vast majority in the range of 1 to 3 × 10~4 m/s. Average velocities are 1.64 and 1.55 × 10~4 m/s, respectively, for positive leaders in IC and -CG flashes. Velocities of positive leaders in IC flashes show a clear negative correlation with initiation altitudes and leader propagation altitudes, similar to negative leaders in IC flashes. The negative correlation also exists for positive leaders in -CG flashes but is relatively weak. We also found that positive leaders in both IC and -CG flashes propagate with a stable velocity, contrary to downward positive leaders in +CG flashes and upward positive leaders in negative upward and triggered flashes, which were usually found to accelerate during propagations. These results suggest that positive leaders in IC and -CG flashes and those in +CG, upward and triggered flashes propagate with essentially different velocities. The differences and possible reasons are discussed.
机译：我们对553骨段（IC）和220个负云到地（-CG）闪光的阳性领导者的速度进行了统计研究。结果发现，IC和-CG闪烁中的正面领导者的速度具有非常相似的分布，绝大多数在1至3×10〜4米/秒的范围内。平均速度分别为1.64和1.55×10〜4米/秒，用于IC和-CG闪光灯。 IC闪烁中正面领导者的速度显示出与启动高度和领导繁殖海拔高度的清晰负相关，类似于IC闪烁中的负面领导者。负相关也存在于-CG闪烁中的正面领导物，但相对较弱。我们还发现，IC和-CG闪光的正面领导者以稳定的速度传播，与向下的+ CG闪烁和向上呈呈闪烁的向上呈闪烁的呈频率相反，通常被发现在传播期间加速。这些结果表明IC和-CG闪烁的正面领导者和+ CG的呈频率，向上和触发的闪光传播与基本不同的速度。讨论了差异和可能的原因。

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