The ocean settles high pressure to the bottom, as you very well know. Same thing for the atmosphere. Gravity is proven because it is a fact. Is there a theory? We have Newton's Law and that has been good enough for centuries. Buoyancy relies entirely on gravity.
If you ever figure it out (it is possible, but you folks always seem incapable of doing it), the centrifugal acceleration from rotation is too small to notice personally (but does cause a bulge of the oceans at the equator). The atmosphere is being carried along with the surface of the Earth because it is a viscous fluid and all viscous fluids have a no-slip boundary condition at the surface. So, it is just carried along. North and south motions cause Coriolis effects such as cyclones and anticyclones. You have a bizarre notion about airplane flights, which differ east to west only because of headwinds, not from Earth's rotation.
The ocean settles high pressure to the bottom, as you very well know. Same thing for the atmosphere. Gravity is proven because it is a fact. Is there a theory? We have Newton's Law and that has been good enough for centuries. Buoyancy relies entirely on gravity.
If you ever figure it out (it is possible, but you folks always seem incapable of doing it), the centrifugal acceleration from rotation is too small to notice personally (but does cause a bulge of the oceans at the equator). The atmosphere is being carried along with the surface of the Earth because it is a viscous fluid and all viscous fluids have a no-slip boundary condition at the surface. So, it is just carried along. North and south motions cause Coriolis effects such as cyclones and anticyclones. You have a bizarre notion about airplane flights, which differ east to west only because of headwinds, not from Earth's rotation.