Electrical structure in thunderstorm convective regions 3. Synthesis
Electrical structure in thunderstorm convective regions 3. Synthesis
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DOI：
10.1029/97jd03545
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发表时间：
1998-06
影响因子：
--
通讯作者：
M. Stolzenburg;W. D. Rust;T. Marshall
中科院分区：
文献类型：
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作者：
M. Stolzenburg;W. D. Rust;T. Marshall
在本文中，近50个电场探测通过对流区的中尺度对流系统（MCS），孤立的超级单体，孤立的新墨西哥州山区风暴的结果进行了比较和合成。这三种类型的雷暴对流被发现有一个共同的，基本的电结构。在对流上升气流的基本电荷结构有四个电荷区，交替的极性，最低的是积极的。在对流上升气流的外部，通常至少有六个电荷区域，极性交替，最低的也是正电荷。在这三种风暴类型中，在上升气流中发现四个基本电荷区的高度和温度存在差异。在MCS对流区上升气流中，主要负电荷区中心的平均高度（温度）为6.93 km（-16 ° C），在超级单体上升气流中为9.12 km（-22 ° C），在新墨西哥州山区风暴上升气流中为6.05 km（-7 ° C）。在所有三种风暴类型的上升气流探测中，主要负电荷区的中心高度随平均气球上升速率和上升气流速度的增加而增加，其速率约为0.3km/1 m s-1，相关系数为0.94。给出了雷暴对流区基本的四电荷和六电荷结构示意图，并作为雷暴电荷结构的改进模型。
In this paper, results from nearly 50 electric field soundings through convective regions of mesoscale convective systems (MCSs), isolated supercells, and isolated New Mexican mountain storms are compared and synthesized. These three types of thunderstorm convection are found to have a common, basic electrical structure. Within convective updrafts the basic charge structure has four charge regions, alternating in polarity, and the lowest is positive. Outside updrafts of convection there are typically at least six charge regions, alternating in polarity, and the lowest is again positive. Among the three storm types, there are differences in the heights and temperatures at which the basic four charge regions are found in updrafts. The height (temperature) of the center of the main negative charge region averages 6.93 km (-16°C) in MCS convective region updrafts, 9.12 km (-22°C) in supercell updrafts, and 6.05 km (-7°C) in New Mexican mountain storm updrafts. In updraft soundings through all three storm types, the center height of the main negative charge region increases with increasing average balloon ascent rate and updraft speed at a rate of about 0.3 km per 1 m s -1 , with a correlation coefficient of 0.94. A schematic illustrates the basic four- and six-charge structure for thunderstorm convective regions, and it is offered as an improved model for thunderstorm charge structure.