Moisture And Precipitations: Not Just Al Gore

Whilst Al Gore’s latest “whopper”

scientists have long pointed out that warmer global temperatures have been increasing the rate of evaporation from the oceans, putting significantly more moisture into the atmosphere — thus causing heavier downfalls of both rain and snow in particular regions, including the Northeastern United States

is being widely and rightly criticized, let me point to a video making similar yet wider claims.

At 8:45 one can hear the following: “with more moisture in the atmosphere due to warming, precipitation events are getting more extreme” (“both in Northern and Tropical areas“)

Could anybody please provide references for “more moisture in the atmosphere” and “precipitation events are getting more extreme“? The video is praised by Romm and SkepticalScience, and I have asked for those references there as well.