Does anybody know if such a collapse would happen instantaneous or more gradual? With the massive amount of water in motion it feels like it would take a long time to stop, or are fluids behaving differently?
It’s not an on / off situation. It will gradually decline until it finally stops or reaches a critical threshold where it’s movement no longer significantly alters weather patterns. None of these climate change thresholds are as black and white as they are made out to be which is one of the argument tactics deniers use to argue against it. The reality is a slow decline until the affects are unrecoverable from.