Submitted by tripperfunster t3_zyslds in askscience
team-tree-syndicate t1_j280sst wrote
Reply to comment by Eternal-brah in How much does the liquid magma of the Earth affect it's surface temperature? by tripperfunster
After some thinking, my best guess would be the prevention of radiation from the sun. Without a magnetosphere, cosmic wind would "blow" away the atmosphere.
cismo2010 t1_j28bgwe wrote
Just to bei more specific, the radiation from the sun which get's blocked/deflected by earths magnetic field are charged particles (e.g. alpha/beta-radiation).
The radiation which "heats" earth ist gamma-radiation in form of photons. A good portion of those photons get reflected by clouds and ice (due to the reflectiveness of white surfaces), another part afterwards get's radiated as infrared-radiation. The Difference between the incoming and (reflected + radiated) photons are the energy earth get's from the sun.
[deleted] t1_j281c9l wrote
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