thunderclouds

The essential cycle of life on Earth , but when thunderclouds burst , quite incredible quantities of water can fall .

但当雷雨云爆发时，会向地面倾泻大量雨水，用不了一个小时骤雨就会把安静的河流变成狂暴的洪水。

This expansion should improve our ability to study natural lightning as well as triggered lightning and should increase the odds of detecting more gamma-ray bursts from the thunderclouds .

扩充后应可提升我们研究自然及人造闪电的能力，并增加从雷雨云探测到γ线的机会。

Two Types of Thunderclouds with Different Charge Structure in China

我国两类电结构不同的雷暴云

The electric field produced by the lower positive charge center of thundercloud

雷雨云下部正电荷中心产生的电场

The corona current characteristic of actual rods system under thundercloud

雷云电场下实型针系统的电晕电流特性

Electromagnetic Wave in Discharge Process from Thundercloud to Ground

雷云对地放电过程中的电磁波

The Cor on a Current on the Needle Electrode under Thundercloud

针电极在雷云电场下电晕电流的研究

A preliminary analysis of intracloud lightning flashes and lower positive charge of thunderclouds

云中闪电及云下部正电荷的初步分析

The charge structure of thunderclouds in Gansu area and Hainan Island is studied by using observation data in this paper .

利用观测资料，对海南岛和甘肃地区雷暴的电结构进行了综合分析研究。

The mechanism of thundercloud electrification is studied .

本文对雷暴云的起电机制进行了研究。

The polarization of a thundercloud may thus be due to the rates at which large and small raindrops fall .

这样，一片雨云的分化取决于较大与较小的雨滴下落花流水的速度。

Meaning : The swollen upper portion of a thundercloud , usually associated with the development of a thunderstorm .

膨胀的上半部分的雷雨云，通常与发展的雷暴有关。

The Simulation of Cubical Charge Thundercloud and Research on Dissipating Currents of Lightning Eliminators

体积电荷雷云的模拟和消散电流的试验研究

The model simulating thunderstorm cell by means of three layers plane charged disk , the calculations for thundercloud electrostatic field use mirror method .

应用电磁学中的镜像法和静电比拟方法，计算其电位、场强的表达式。

Taking feasible method to decrease the galloping of ground wire and the moving speed of thundercloud can effectively reduce accidents caused by lightning.10 .

采取切实可行的方法降低减小导地线舞动、减小雷云移动速度，从而有效减少雷害事故的发生。

In the atmosphere , static electric fields ( also referred to as electrostatic fields ) occur naturally , in fair weather , and especially under thunderclouds .

在大气中，静电场在晴天、特别是雷阵雨时自然产生。

The records show that under active thunderclouds surface Maxwell current density reflects the change of cloud charge sources , and is quasi-steady between lightning discharges .

发现在强雷暴下，地面麦克斯韦电流密度反映了雷暴云内电荷源的变化，并在闪电间保持准稳态特性；

That is to say , the lightning rod cannot provide electrification ions enough to neutralize the charges in the thunderclouds and cannot avoid lightning .

避雷针不能干扰雷云电荷及其分布，不能影响雷击的发生。

Using the data of 325 m meteorological tower in Beijing , the fine structure and characteristics of turbulence and spectra of the density current of thunderclouds during the thundercloud passage are analysed .

本文利用强雷雨云通过期间北京325米气象塔资料，分析了强雷雨云低层流出气流的小尺度结构、湍流结构和谱特征。

The total lightning and cloud lightning presented linear distribution over the moving track of the thundercloud , and the ground lightning concentrated in hail falling zone , the most ground lightning was minus .

在雷雨云移动路径上，总闪和云闪为线状分布，地闪集中分布在降雹区，云闪最多，地闪中绝大多数为负闪。

Thunderclouds were massing in the north-west .

西北方正雷雨云密布。

In your distress you called and I rescued you , I answered you out of a thundercloud ; I tested you at the waters of Meribah .

你在急难中呼求，我就搭救你。我在雷的隐密处应允你，在米利巴水那里试验你。

When it reaches the top of the cloud mass , the air gets spit out at the top . This air is sent rolling out over the big , anvil shaped head of the thunderclouds .

当暖湿气流达到云层顶部时，会被挤出云层，这股气流会翻过巨大的铁砧形雷雨云。

The forest fire caused by lighting are introduced from the several aspects such as the construction of thundercloud , and the formation , developing , energy , and power of the lighting . The principle of equivalent energy generator is provided to simulated lighting .

从雷雨云的结构、闪电的形成与发展过程、闪电的能量与功率等方面介绍了闪电引发森林火灾的过程，提出了采用等效发生器的原则对雷电进行模拟。

In the field experiment of artificially triggering lightning conducted near Nanchang , Jiangxi in the summer of 1996 , 3 lightning flashes were successfully triggered by use of newly-developed technique with ungrounded rocket-wire system in negative ambient electric field of thunderclouds .

1996年夏季在江西南昌附近进行的人工触发闪电野外实验中，用新开发的不接地的火箭－导线技术成功地在雷暴云下的负环境电场中触发了云对地闪电。

To explain the lightning eliminating mechanism simulation tests were carried out which reveal that the dissipating current will cut down the net charging current inside a thundercloud , slow down the rising speed of voltage and reduce the cloud voltage value so as to prevent from lightning strokes .

为探索消雷机理用体积电荷雷云进行了模拟试验。结果表明，消散电流对雷云净起电电流的削减将减缓雷云电压的上升速度并减低雷云电压数值，从而实现消雷。