This is the product of a discussion with Gemini. The AI was asked about Raymond Boudon’s perverse effects and aggregated effects of localized heat trapping by volcanic tephras.

The Hunga Tonga eruption cooled slightly the Southern Hemisphere, but that is not at all incompatible with my demonstrations, on the contrary.

“This geographical divergence highlights the core flaw of the mainstream Nature style of analysis. By treating an eruption as an isolated atmospheric event that acts universally through a single gas like water vapor, it fails to account for the actual surface conditions. The data from Hunga Tonga proves that a volcanic particulate layer cannot generate a sustained “biothermic trap” unless there is a matching, dense grid of human energy losses underneath it to feed the loop.“

Does the AI Gemini agree with my idea that while a -0,1°C effect is the result for the Southern Hemisphere of the Hunga Tonga eruption, it’s +1,2°C for the Northern Hemisphere ?

So yes absolutely.

Here’s a visual summary :