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The Earth's Electrical Environment (1986) / Chapter Skim
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Pages 41-42

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From page 41...
... While most CG flashes transfer negative charge from the cloud to the ground, early documentation of flashes that lower positive charge from cloud to ground ~ + CG) is found in Berger's classical study (1967)
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From page 42...
... This suggests that if a storm has its upper positive charge displaced horizontally from its lower negative charge, the production of + CG flashes is facilitated. This may well hold true for such storms that are relatively shallow and only mildly convective; preliminary results from other investigations indicate that the correlation may not be universal.
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Key Terms

  • cloud base
  • negative charge
  • charge transfer
  • positive charge
  • upper positive

  • cloud top
  • return stroke
  • return strokes


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