Michael Mann says climate models cannot explain the Medieval Warming Period – I say they can't even explain the present

Ice core data shows CO2 levels changed less than 10 parts per million from 1600-1800 during the MWP. From the Hockey Schtick:  A new paper from Schurer et al (with Mann…

Mike Mann's "secret" meeting on the Medieval Warm Period

While not really “secret”, one might describe it that way because unlike the many things Dr. Mann has been doing lately, there wasn’t one peep of press coverage about it.…

Mann has a new paper: he apparently discovers the Medieval Warm Period

Sorry no graphics, no abstract or paper (not published yet, due Friday the 27th, I hate it when they do this) the Penn State press release was rather spartan. So…

Woods Hole embraces the Medieval Warm Period – contradict Mann's proxy data

“The more interesting and potentially controversial result is that our data indicate surface water temperatures during a part of the Medieval Warm Period that are similar to today’s…” “Although there…

Global Warming is happening, what does it mean?

By Andy May The concepts and data used to make temperature and climate reconstructions, or estimates, are constantly evolving. Currently, there are over 100,000 global weather stations on land and…

Update On Michael Mann v. Mark Steyn Litigation

The tortured history of this case very well illustrates the difficulty of trying to strike a good balance between, on the one hand, having libel law as a mechanism for…

Michael Mann’s 2008 Reconstruction

By Andy May In my last post, it was suggested that Michael Mann’s 2008 reconstruction (Mann, et al., 2008) was similar to Moberg’s 2005 (Moberg, Sonechkin, Holmgren, Datsenko, & Karlen,…

Claim: The Temperature Spike Just Prior to the Little Ice Age can Teach Us about Modern Global Warming

According to Patric Seifert, a tropospheric researcher at the Leibniz Institute in Germany, a large scale temperature spike occurred just before the onset of the Little Ice Age. Seifert does…

Causation Of Climate Change: Was The Medieval Warm Period “Regional”?

Some commenters yesterday noted that the climate establishment has not just completely ignored the threat to their orthodoxy posed by the Medieval Warm Period and other similarly-warm pre-human-emissions eras. Initially,…

The Real Climate Crisis Is Not Global Warming, It Is Cooling, And It May Have Already Started

By Allan MacRae and Joseph D’Aleo, October 2019 Introduction – Catastrophic Anthropogenic Global Warming – A Failed Hypothesis The Catastrophic Anthropogenic Global Warming (“CAGW”, aka “Global Warming”, “Climate Change”, “Climate…

Defending Mann’s Hockey Stick because #ExxonKnew

Guest commentary by David Middleton Have you noticed the media’s coverage of Dr. Tim Ball’s court victory? Neither did I. The great news about Dr. Tim Ball’s court victory over…

ClimateGate continues – the Mann Hockeystick University of Arizona emails are now public

After years of trying to suppress their release, and finally being ordered to be released by a judge, they are now public, and we have them here. This will remain…

Yet another study illustrates that the Medieval Warming Period was not regional, but global

Michael Mann and his team of data manglers like-minded scientists like to tell us the Medieval Warming Period was just a “regional” event rather than global, because if it was global,…

Modern Warming – Climate Variability or Climate Change?

Guest Post By Renee Hannon Introduction In the mid-1900’s many scientists were suggesting the Earth was cooling. Now scientists are forecasting global warming. Indeed, instrumental data shows global temperatures warmed…

Previous Identification of Groupthink: Part of Why the Public Doesn't Believe in Global Warming

Guest Opinion: Dr. Tim Ball I published the following article on Canada Free Press (CFP) in 2010. I also posted it to my web site in 2012. This posting was…

More evidence that the Medieval Warming Period was global, not regional

From the “we have to get rid of the Medieval Warming Period” department. Even though this paper was published in late 2017, it was recently highlighted in EoS, as shown…

What are, in fact, the grounds for concern about global warming?

By Javier This is an answer to the Geological Society of London position statement on “Climate Change: evidence from the geological record,” published in November 2010, and the addendum published…

Dr. Fred Singer on 'Global Warming Surprises'

Temp data in dispute can reverse conclusions about human influence on climate. Guest essay by Dr. Fred Singer Exploring some of the intricacies of GW [Global Warming] science can lead…

Reflections on Mark Steyn’s ‘A Disgrace to the Profession’ about Dr. Michael Mann

Given what happened today in live testimony before the House Science Commiittee where Dr. Mann was testifying, this review seems germane and timely. Guest essay by Rick Wallace Mark Steyn’s…

The Medieval Warm Period in Antarctica: How two one-data-point studies missed the target

Guest essay by Sebastian Lüning A common claim by warmists in the climate debate is the alleged absence of the Medieval Warm Period (MWP) in the Southern Hemisphere. In a…

Evidence of the Medieval Warm Period in Australia, New Zealand and Oceania

By Sebastian Lüning Geoscientist and co-author of ‘The neglected Sun’ The climate of the pre-industrial past is of greatest importance to the ongoing climate discussion. Current climate can only be…

More facts against the Mann – 'late 20th century warming has not been unique within…the past 750 years '

Earlier this week, in Facts against the Mann, we noted how some ice core data cast doubt on Michael E. Mann’s recent claim that:  “overall warmth of the globe and…

Quote of the Week: facts against the Mann

While ramping up his own invective to fit as much ad hominem as possible into a single sentence: Mr. Sauer parroted baseless talking points that have their origin in fossil-fuel…

Evidence that Dr Michael Mann misled a court

Guest opinion by Christopher Monckton of Brenchley This memorandum sets out evidence of falsehood with intent to mislead a court by Dr Michael E. Mann in a case in the…