Comment Re:Effect of nukes on NEOs (Score 1) 272
No, because those millions of small pieces release the same amount of energy into the Earth system, just now into the atmosphere now rather than the planet surface
You start with an incontrovertible claim,
Rather than ejecting material, earthquakes, tsunamis, you flash fry the hemisphere
And you use it to justify pure poppycock?
The atmosphere is big. The earth- it's also really goddamn big. The energy required to raise a hemisphere's atmospheric temperature enough to "fry" us is so goddamn big that there's no point in worrying about it. If something the size of Texas is about to hit us, we're just fucked.
The beast that (I guess contentiously, now?) knocked out the dinosaurs, spread across an entire hemisphere would yield about 193MW/m^2, to dissipate through a 100km column, giving us... 1.9kW/m^3 of dissipation, assuming impossibly worst case scenario (instantaneous thermal conversion across entire air volume)... which is quite survivable.
Realistically, the dissipation will be far better distributed over time and area (a lot of impactors will take long paths through the atmosphere, being not direct hits, better improving their dissipation at high altitudes)
It's not a... "good" thing, for sure... But it's not the total annihilation of a hemisphere.