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Scientists discovered fast negative breakdown in thunderstorms, a new electrical discharge phenomenon. This finding challenges current dielectric breakdown theories and requires an updated understanding of electrical discharges in air.

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Area of Science:

  • Atmospheric electricity
  • Plasma physics
  • Electromagnetism

Background:

  • Thunderstorms are natural laboratories for studying electrical discharges.
  • Recent discoveries like sprites and jets reveal gaps in dielectric breakdown understanding.
  • Existing theories primarily focus on laboratory-based dielectric breakdown.

Purpose of the Study:

  • To investigate novel electrical discharge phenomena in thunderstorms.
  • To challenge and expand current dielectric breakdown theories.
  • To present the discovery of fast negative breakdown.

Main Methods:

  • Adaptation of radio astronomy imaging techniques.
  • Study of extremely transient lightning-associated events.
  • Analysis of electrical breakdown initiation in thunderstorms.

Main Results:

  • Confirmation of fast negative breakdown, an unexpected electrical discharge.
  • Observation of oppositely-directed fast breakdown of negative polarity.
  • Demonstration that electrical breakdown can initiate with negative polarity fast breakdown.

Conclusions:

  • Fast negative breakdown is a newly identified electrical discharge mechanism.
  • This discovery necessitates an addendum to the physical description of electrical discharges in air.
  • Thunderstorm electrical phenomena extend beyond current dielectric breakdown models.