Search Results for: autocorrelation

It was mentioned in recent discussion that Cohen et al. (2012) found recent winter cooling in much of the boreal (northern but not necessarily Arctic) northern hemisphere. In fact, here’s their key graph for that particular question: Colors show the … Continue reading →

Not long ago, the Hadley Centre/Climate Research Unit in the U.K. released their new “HadCRUT4” global temperature data set. That prompted David Rose of the Daily Mail to claim that “Global warming stopped 16 years ago.”

Christine Shepard has recently published her first peer-reviewed paper as lead author, Assessing future risk: quantifying the effects of sea level rise on storm surge risk for the southern shores of Long Island, New York (Shepard et al. 2012, Nat. … Continue reading →

The subject came up — yet again — whether or not there is a “pause” in global warming recently. Specifically: Re looking at global warming over the last 15 years. I know it breaks all the “statistical” rules, but just … Continue reading →

NOTE: see the UPDATE at the end of the post. Jeff Masters at Wunderblog (part of Weather Underground) reported that for the lower-48 states of the USA, every one of the last 13 months was in the top third of … Continue reading →

One of the most often-asked questions about climate data is, “How long a time period do we need to establish a statistically significant trend?”

A reader asked whether we might take a look at a recent post by Bob Tisdale on WUWT. Let’s do that, shall we? Incidentally, Tisdale has since created another post on WUWT on the same subject, which is: a paper … Continue reading →

Tim Curtin’s paper in TSWJ isn’t the first time he’s mis-applied the Durbin-Watson test in order to justify rejecting a regression of physical variables (he substituted regression of the differenced values, after which he found the regression not statistically significant). … Continue reading →

Our old friend Tim Curtin has published a paper in what is supposed to be a peer-reviewed scientific journal. I’m skeptical. He regresses temperature time series against a variety of predictor variables, concluding that there is no real influence of … Continue reading →