In terms of climate? That’s more about where exactly the jet stream normally falls. It acts as a sort of air curtain between the cold polar air and the warm equatorial air, like the air curtains over a door to an air conditioned building. The exact path of the jet stream is affected by the strength of the polar and equatorial systems.

Also, if the climate gets really screwed up and the jet stream weakens or changes paths, places are gonna have to adapt to new climates real fuckin quick.