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Pages 210-211

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From page 210...
... , as shown in the upper frame of Figure 15.3. The diurnal change of electrical conductivity over the oceans is relatively small, and therefore Ohm's law requires that the airearth current density also follow the diurnal variation of electric field.
From page 211...
... The summation of the component curves represents the diurnal variation of worldwide thunderstorm activity. The similarity of the diurnal variation of electric field over 211 the ocean and the diurnal variation of worldwide thunderstorm activity supports the hypothesis that thunderstorms are the electrical generator in the global circuit.


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