If this actually became necessary, I would assume we're already in a world where sea ice has been gone for a decade or more, polar wildlife is a write-off alrea

If this actually became necessary, I would assume we're already in a world where sea ice has been gone for a decade or more, polar wildlife is a write-off already and humanity is facing regular catastrophic climate events (storms, floods, and fires), mass migrations and famines. My point isn't that it's an amazing idea, or even a good one, just that it's eminently within the realms of physical and economic possibility. Hell, SAC probably flew a comparable number air miles than that for decades at a time, just circling nuclear weapons near the USSR.