Setting the Atmosphere on Fire?

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    Atmosphere Fire
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Discussion Overview

The discussion explores the hypothetical scenario of igniting the atmosphere, examining the necessary conditions and potential consequences. It touches on theoretical implications, historical events, and the chemistry of combustion.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants propose that significant energy, potentially from a stellar nucleus greater than that of the sun, would be required to alter the atmosphere and create heavier gases.
  • There is a question about the effects of increasing oxygen levels above 30%, with some curiosity about impacts beyond longer-burning fires and human combustion.
  • Participants identify the components of the Fire Triangle, noting that oxygen is just one part, with heat and fuel being necessary for combustion.
  • A historical hypothesis is presented regarding the KT extinction event, suggesting that an asteroid impact could have heated the atmosphere and caused widespread fires, leading to significant ecological changes.

Areas of Agreement / Disagreement

Participants express curiosity and explore various aspects of the topic, but there is no consensus on the feasibility or implications of igniting the atmosphere. Multiple competing views and hypotheses are present.

Contextual Notes

The discussion includes speculative scenarios and historical hypotheses that depend on various assumptions about energy requirements and atmospheric chemistry. Some claims remain unresolved or lack detailed mathematical backing.

JRDunassigned
Is it possible? As far as I know you'd need energy from a star nucleus greater than the suns to cause any change in the atmosphere, creating heavier gasses right?

Could the amount of oxygen in the air going above 30% have any impact other than fires burning longer, or any human combustion?

Just curious. Ignore the lab coat, maniacal laugh and questionable mustache
 
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JRDunassigned said:
Is it possible? As far as I know you'd need energy from a star nucleus greater than the suns to cause any change in the atmosphere, creating heavier gasses right?

Could the amount of oxygen in the air going above 30% have any impact other than fires burning longer, or any human combustion?

Just curious. Ignore the lab coat, maniacal laugh and questionable mustache

O2 is just one side of the Fire Triangle. What are the other 2 requirements for fire?
 
heat and fuel! you only need a spark to ignite the fumes :D
 
JRDunassigned said:
heat and fuel! you only need a spark to ignite the fumes :D

Correct-a-mundo! So to set the atmosphere on fire, you need one tiny spark, and a huge what?
 
BTW, just a reminder to everyone that dangerous activities are not allowed discussion topics on the PF. But we are talking non-physical stuff here, so it's sort of okay...
 
Something like this is hypothesized during the KT extinction event 65Ma.

A 5 mile asteroid collides with earth, forming a 100 mile crater.
It ejects a large amount of material into low Earth orbit.
As this material re-enters that atmosphere, a trillion or so meteors are formed.
The meteors burn up as they fall to earth. This heats the
atmosphere to over 1000F, thereby incinerating the surface of the earth.
The Dinosaurs that survive the initial impact, earthquakes and tsunami's are
then cooked in the heat blast which last for several hours.
A global fire then continues to rage for a few days, burning all the trees and surface plants.

The dust then obscures the sun and plunges the Earth into a global winter
for a few years. After the dust clears, all the CO2 that is now in the
atmosphere results in a prolonged period of global warming.

Fish and turtles survive okay as do small burrowing creatures. Ferns are among
the first plants to start growing on the land.

The end of one era and the beginning of another.
 

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