Climate change could revive medieval megadroughts in US Southwest

Study picks apart factors that caused severe, long-lasting droughts and suggests increased risk for future Earth Institute at Columbia University About a dozen megadroughts struck the American Southwest during the 9th through the 15th centuries, but then they mysteriously ceased around the year 1600. What caused this clustering of megadroughts — that is, severe droughts…

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Remystifying Climate Feedback

By Joe Born 1. Introduction By presenting actual calculation results from a specific feedback-system example, the plots below will put some graphical meat on the verbal bones of Nick Stokes’ recent “Demystifying Feedback” post. I heartily agree with the main message I took from Mr. Stokes’ post: although some climate equations may be similar to…

How They airbrushed out the Inconvenient Pause

By Christopher Monckton of Brenchley In November 2015, just before the faithful gathered around their capering, gibbering witch-doctors and shamans in Paris for the New Superstition’s annual festival of thanks and praise, hugs and back-slapping, the Inconvenient Pause lengthened to 18 years 9 months. One-third of Man’s entire influence on climate since the Industrial Revolution…

Do the Adjustments to the Global Land+Ocean Surface Temperature Data Always Decrease the Reported Global Warming Rate?

Guest Post by Bob Tisdale If you’ve read the first two posts in this series you might already believe you know the answer to the title question.  Those two posts were: Do the Adjustments to Sea Surface Temperature Data Lower the Global Warming Rate? (WattsUpWithThat cross post is here.) UPDATED: Do the Adjustments to Land Surface…