Earth's environment simply didn't have to contend with that nearby moon
of ours prior to 10,500 BC, just that of our 100,000 and some odd year
orbit of Sirius.
0.1% of the associated 2e20 Joules = 390 w/m2 (plus whatever secondary
IR/FIR)
0.01% of the associated 2e20 Joules = 39 w/m2 (plus whatever secondary
IR/FIR)
Therefore, giving humanity 10% responsibility and that nasty moon of
ours the other 90% seems more than likely, especially since the energy
cycle of making warm water to ice and then ice back into warm water is
so freaking horrific, especially if we're taking the km3 volumes of said
ice into account.
At most I'd be giving humanity 25% responsibility, although either way
of being 25% or as little as 10% is still worth our doing something
about, such as cutting that artificial impact in half seems perfectly
doable, and it's way more than beneficial in so many other positive
ways, other than moderating our fair share of this never ending cycle of
global warming, that is unless you're perfectly good with your next
'happy meal' being a McJellyfish sandwich.
-
Brad Guth
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