Global...CoolingPosted: 2 years ago by Hoosker The total amount of cooling ranges from 0.65C up to 0.75C -- a value large enough to wipe out most of the warming recorded over the past 100 years. All in one year's time. For all four sources, it's the single fastest temperature change ever recorded, either up or down. Comments: 21 Score: [-] 492 [+].