These are "flashes" and not "bursts".

The article you referenced sp[ecifically describes their origin as

They seem to have a connection with lightning, but TGFs themselves are something entirely different.

"In fact," says Doug Rowland of NASA's Goddard Space Flight Center, "before the 1990s nobody knew they even existed. And yet they're the most potent natural particle accelerators on Earth."

Individual particles in a TGF acquire a huge amount of energy, sometimes in excess of 20 mega-electron volts (MeV). In contrast, the colorful auroras that light up the skies at high latitudes are powered by particles with less than one thousandth as much energy.

At this stage, there are more questions about TGFs than answers. What causes these high-energy flashes? Do they help trigger lightning--or does lightning trigger them?

These are NOT related to disintegration of atomic buclei and your old and worn ideas about climate change and atmospheric loss through nuclear pollution are non-scientific and not particularly appropriate here.

Nonmetheless, it's good to see you referencing interesting scientific articles. Keep it up, and keep READING the articles and LEARNING from them, rather than fitting them to your preconceptions