Corona discharge on the tips of tree leaves
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Started by metmike - March 13, 2026, 9:25 a.m.

Treetops Emit Ultraviolet Sparkles During Thunderstorms. Researchers Just Filmed It in Nature for the First Time

          The weather events probably cause the air around leaves to produce weak electrical discharges

https://www.smithsonianmag.com/smart-news/treetops-emit-ultraviolet-sparkles-during-thunderstorms-researchers-just-filmed-it-in-nature-for-the-first-time-180988275/

Spruce needles with subtle blue glow against a black background



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https://en.wikipedia.org/wiki/Corona_discharge

A corona discharge is a process by which a current flows from an electrode with a high potential into a neutral fluid, usually air, by ionizing that fluid so as to create a region of plasma around the electrode. The ions generated eventually pass the charge to nearby areas of lower potential, or recombine to form neutral gas molecules.

When the potential gradient (electric field) is large enough at a point in the fluid, the fluid at that point ionizes and it becomes conductive. If a charged object has a sharp point, the electric field strength around that point will be much higher than elsewhere. Air near the electrode can become ionized (partially conductive), while regions more distant do not. When the air near the point becomes conductive, it has the effect of increasing the apparent size of the conductor. Since the new conductive region is less sharp, the ionization may not extend past this local region. Outside this region of ionization and conductivity, the charged particles slowly find their way to an oppositely charged object and are neutralized.

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By metmike - March 13, 2026, 9:30 a.m.
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Carbon Capture Utilization and Storage:
Exploring the Efficacy of Negative Corona
Discharge in CO2 Decomposition

https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=10669575

By metmike - March 13, 2026, 9:42 a.m.
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How a Corona Discharge Ozone Generator Works

https://waboost.com/blog/how-an-ozone-generator-works-with-corona-discharge

How Ozone is Formed

The basic chemical reaction for ozone formation is:

Here’s what happens inside a corona discharge ozone generator:

  1. Oxygen Supply: The generator takes in dry air or pure oxygen. Moisture is avoided because water can interfere with ozone formation and damage the generator.
  2. High Voltage Application: A high-voltage AC or pulsed DC is applied across electrodes separated by a dielectric material (usually glass, ceramic, or Teflon). This creates the corona discharge.
  3. Molecular Splitting: Energetic electrons in the corona collide with O₂ molecules, breaking them into individual oxygen atoms (O).
  4. Ozone Formation: These free oxygen atoms quickly react with intact O₂ molecules to form ozone (O₃).
  5. Ozone Output: The ozone-enriched gas exits the generator and is delivered to the desired application, such as an air duct, water tank, or sterilization chamber.

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By metmike - March 13, 2026, 9:56 a.m.
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By metmike - May 14, 2026, 9:27 p.m.
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What Causes Lightning and Thunder?

https://www.nesdis.noaa.gov/about/k-12-education/severe-weather/what-causes-lightning-and-thunder

  

                                                                                                                                                                  



Infographic - when lightning roars, go indoors

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Lightning

https://en.wikipedia.org/wiki/Lightning

Lightning is a natural phenomenon consisting of electrostatic discharges occurring through the atmosphere between two electrically charged regions. One or both regions are within the atmosphere, with the second region sometimes occurring on the ground. Following the lightning, the regions become partially or wholly electrically neutralized.

Lightning involves a near-instantaneous release of energy on a scale averaging between 200 megajoules and 7 gigajoules.[1][2][3] The air around the lightning flash rapidly heats to temperatures of about 30,000 °C (54,000 °F).[4] There is an emission of electromagnetic radiation across a wide range of wavelengths, some visible as a bright flash. Lightning also causes thunder, a sound from the shock wave which develops as heated gases in the vicinity of the discharge experience a sudden increase in pressure.

animation of charged particles moving up and down.

When the rising ice crystals collide with graupel, the ice crystals become positively charged and the graupel becomes negatively charged.

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The upper part of the thunderstorm cloud becomes positively charged while the middle to the lower part of the thunderstorm cloud becomes negatively charged.

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A downward leader travels towards earth, branching as it goes.

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Lightning strike caused by the connection of two leaders, positive shown in blue and negative in red