Insight into the Kinematic and Microphysical Processes that Control Lightning Jumps
Insight into the Kinematic and Microphysical Processes that Control Lightning Jumps
复制标题
深入了解控制闪电跳跃的运动学和微观物理过程
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
R. Blakeslee
中科院分区：
文献类型：
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作者：
C. Schultz;L. Carey;Elise V. Schultz;R. Blakeslee
AbstractA详细的案例研究分析的四个雷暴进行使用偏振和多多普勒能力，提供具体的物理和动力学驱动程序背后的闪电跳跃。总闪电率的小幅增加和闪电跳跃之间的主要区别是在−10° C和−40°C等温线之间的质量和上升气流体积的增加≥10 m s−1。上升气流体积≥10 m s−1的增加幅度至少比霰质量和总闪光速率的增加提前3-5 min。在雷暴的整个生命周期中，上升气流体积≥10 m s-1与总的闪电率的相关性比最大上升气流速度更强。然而，峰值上升气流速度增加之前的12个闪电跳跃检查8。在所有四个雷暴中观察到总闪电增加期间平均和中值闪光足迹大小的减少，并且在最强烈的风暴的发展阶段中最显着。然而，这种反向关系打破了L...
AbstractA detailed case study analysis of four thunderstorms is performed using polarimetric and multi-Doppler capabilities to provide specificity on the physical and dynamical drivers behind lightning jumps. The main differences between small increases in the total flash rate and a lightning jump are the increases in graupel mass and updraft volumes ≥10 m s−1 between the −10° and −40°C isotherms. Updraft volumes ≥10 m s−1 increased in magnitude at least 3–5 min in advance of the increase in both graupel mass and total flash rate. Updraft volumes ≥10 m s−1 are more robustly correlated to total flash rate than maximum updraft speed over a thunderstorm’s entire life cycle. However, peak updraft speeds increase prior to 8 of the 12 lightning jumps examined. Decreases in mean and median flash footprint size during increases in total lightning are observed in all four thunderstorms and are most notable during development stages within the most intense storms. However, this inverse relationship breaks down on l...