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eletricidade atmosférica
Definição1
Conjunto de fenômenos elétricos que ocorrem na atmosfera terrestre.
Fonte1
CAMPOS, M. C.; PAIVA, P. T.; PRICEVICIUS, T.; VARANDA, T. V. C. Glossário de aviação. São Paulo: Núcleo de Estudos de Tradução, 2002.
Imagem

 Cloud to ground Lightning in the global atmospheric electrical circuit. This is an example of plasma present at Earth's surface. Typically, lightning discharges 30,000 amperes, at up to 100 million volts, and emits light, radio waves, x-rays and even gamma rays. Plasma temperatures in lightning can approach 28,000 kelvins and electron densities may exceed 1024/m3.

Cloud to ground Lightning in the global atmospheric electrical circuit. This is an example of plasma present at Earth's surface. Typically, lightning discharges 30,000 amperes, at up to 100 million volts, and emits light, radio waves, x-rays and even gamma rays. Plasma temperatures in lightning can approach 28,000 kelvins and electron densities may exceed 1024/m3.

Fonte: http://en.wikipedia.org/wiki/File:Lightning_over_Oradea_Romania_3.jpg