Sure there’s global warming. Ten thousand years ago there was a mile of ice on top of Central Park, now it’s gone. It melted due to global warming. That’s happened countless times before and will again. It’s called glaciation and it’s a normal part of this planets climate cycle. People are observers, not causes.
There’s a thin skin of ice on the lake this morning.
The earth has warmed and cooled hundreds of times in the 4.3 billion years it has been around. What’s new ?