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…

IPCC Method Of Proving The 'Human Caused Warming' (AGW) Hypothesis Forced Deliberate Creation of Misinformation

Guest essay by Dr. Tim Ball “Liberty cannot be preserved without a general knowledge among the people, who have a right, from the frame of their nature, to knowledge, as…

A baseless Mann UVa email – claims by Mann spliced and diced

Richard S. Courtney writes in comments on the Mann and misrepresentations thread… Anthony: In the same week as MBH98 was published I wrote an email on the ‘ClimateSkeptics’ circulation list.…

Hide the decline deja vu? Mann's 'little white line' as 'False Hope' may actually be false hype

Foreword by Anthony Watts  An essay by Monckton of Brenchley follows, but I wanted to bring this graphic from Dr. Mann’s recent Scientific American article to attention first. In the…

New study suggests global warming decreases storm activity and extreme weather

A paper published January 21st in Quaternary Science Reviews reconstructs storm activity in Iceland over the past 1,200 years and finds storminess and extreme weather variability was far more common…

The Inventor of the Global-Warming 'Hockeystick' Doubles Down

Professor Michael Mann, if you see something, say something – or maybe just keep your mouth shut Guest essay by  Dr. Fred Singer Professor Michael Mann, the inventor of the…

New paper shows Medieval Warm Period was global in scope

Andrew Revkin writes: Michael Mann can’t be happy about this work. Here’s a chat with two authors of an important new Science paper examining 10,000 years of layered fossil plankton…

Sticking it to the Mann

Global warming has stopped. Get over it.  A response to Michael Mann in the Richmond Times Dispatch By Christopher Monckton of Brenchley The collapsed global warming scare certainly has some…

The Medieval Warm Period in the Arctic

Since the IPCC AR5 is again making news in talking about the Medieval Warm Period, this review from Craig Idso at CO2Science.org seems appropriate. -Anthony Medieval Warm Period (Arctic) —…

IPCC throws Mann's Hockey Stick under the bus?

While the media circulates the talking points pre-release “leaked draft” of IPCC’s AR5 amongst themselves, there are a few nuggets of interest coming out here and there we can write…

Mann's hockey stick disappears – and CRU's Briffa helps make the MWP live again by pointing out bias in the data

Shock, awe. Untruncated and unspliced data used in a new paper from Briffa and Melvin at UEA restores the Medieval Warm Period while at the same time disappears Mann’s hockey…

Yet another paper demonstrates warmer temperatures 1000 years ago and even 2000 years ago.

Yesterday I highlighted the paper The extra-tropical Northern Hemisphere temperature in the last two millennia: reconstructions of low-frequency variability, by B Christiansen of the Danish Meteorological Institute and F C…

New paper confirms the climate was warmer 1000 years ago

Mike Mann will have a twitfest on Twitter trying to knock this one down. Data from 91 Northern Hemisphere proxies was used to reconstruct temperature. See reconstruction graph (figure 5)…

Make your own Michael Mann hockey stick at home

Following yesterday’s first look at emails from the 2 year effort to get NOAA to release emails from FOIA requests, where we learn that some scientists felt ‘Hit on the…

Another paper refutes the Mann made hockey stick – MWP was ≈1°C warmer than current temperatures

This new paper uses a rather unique proxy; high-resolution samples micromilled from archaeological shells of the European limpet, Patella vulgata. Mr. Limpet would be proud. A paper published this week…

This is what global cooling really looks like – new tree ring study shows 2000 years of cooling – previous studies underestimated temperatures of Roman and Medieval Warm Periods

Since Princeton’s Dr. Michael Oppenheimer conflated weather with climate last week, proclaiming a short lived heat wave as “This is what global warming really looks like” in a media interview, it…

I've been Mannhandled

We love you too Mikey. At least we know he reads WUWT. Get a load of this response to the above:

Mann's 'hockey stick' claims of the MWP and LIA being local were refuted years before it was published

Pierre Gosselin at NoTricksZone reports: Geologist Dr. Sebastian Lüning and Prof. Fritz Vahrenholt found a Japanese tree-ring temperature reconstruction from 1995, one that should have been heeded by the IPCC and Michael…

Yes, I know, I covered it first: The Medieval Warm Period was Global

I must have had 20 tips and notes/contacts over the past 24 hours like this one: New temperature proxy discovered An article (http://www.dailymail.co.uk/sciencetech/article-2120512/Global-warming-Earth-heated-medieval-times-human-CO2-emissions.html) in the Mail Online describes a paper…

More evidence the Medieval Warm Period was global

UPDATE: 3/30/12 Since a number of commenters that are getting bent out of shape over the issue can’t apparently be bothered to read the paper, and since the authors at…