If the global temperature rises, then that puts more water molecules in the atmosphere. As well as eventually having to come back down at some point, the extra weight of the molecules in the atmosphere causes the air underneath to become more compressed producing extra heat.....resulting in more water evaporating....and so on.....
Till we get to a point where the ice caps have virtually melted, more sunlight is blocked out, the Atlantic Drift, and other in the oceans shutdown, and we plummet into an ice age, which can take as little as 20 years.....and boy are we overdue one.
