annual logmean of recent eruptions

Volcanoes Once Again, Again

Guest Post by Willis Eschenbach [also, see update at the end of the post] Anthony recently highlighted a couple of new papers claiming to explain the current plateau in global warming. This time, it’s volcanoes, but the claim this time is that it’s not the big volcanoes. It’s the small volcanoes. The studies both seem to…

downscaling science mag

The Best Test of Downscaling

Guest Post by Willis Eschenbach In a recent issue of Science magazine there was a “Perspective” article entitled “Projecting regional change” (paywalled here)  This is the opening: Techniques to downscale global climate model (GCM) output and produce high-resolution climate change projections have emerged over the past two decades. GCM projections of future climate change, with…

ocean ph along transect

A Neutral View of Oceanic pH

Guest Post by Willis Eschenbach Following up on my previous investigations into the oceanic pH dataset, I’ve taken a deeper look at what the 2.5 million pH data points from the oceanographic data can tell us. Let me start with an overview of oceanic pH (the measure of alkalinity/acidity, with neutral being a pH of…

Sampling Density Map Surface pH Atlantic

pH Sampling Density

Guest Post by Willis Eschenbach A recent post by Anthony Watts highlighted a curious fact. This is that records of some two and a half million oceanic pH samples existed, but weren’t used in testimony before Congress about ocean pH. The post was accompanied by a graph which purported to show a historical variation in ocean…

republican uncle

Automated Twits

Guest Post by Willis Eschenbach People wonder why anthropogenic global warming is a politicized issue. Here’s one reason among many. In a presentation aimed at the holidays that is impossible to parody, the Democratic National Committee (DNC) has put up a website called, no kidding, “the Democrat’s guide to talking politics with your republican uncle”.…

42 CMIP5 climate models and HadCRUT4

CMIP5 Model Temperature Results in Excel

Guest Post by Willis Eschenbach I’ve been looking at the surface temperature results from the 42 CMIP5 models used in the IPCC reports. It’s a bit of a game to download them from the outstanding KNMI site. To get around that, I’ve collated them into an Excel workbook so that everyone can investigate them. Here’s…