Many people, myself included, have wondered if the human race should be worried about the sun exploding at some point in our future (it seems to be well established that we shouldn't be worried.) On a similar train of thought, I am curious as to what would happen to Earth if one of the fundamental forces, gravity, were to suddenly become weaker for some unexplained reason. I know that we generally consider mass in the present to have a gravitational pull that is constant - but what if, for reasons beyond our current understanding, the pull of gravity spontaneously became slightly weaker?
Specifically, what would happen to Earth's atmosphere if gravity were to suddenly become 9/10 as strong as it is currently? Would humans be able to survive?
I have found many answers about what would happen if it was absent, weaker from the beginning of the universe, etc, but nothing that answers this version of the question specifically.
EDIT: narrowed question