IPCC 6th Climate Report: Who Deleted The Medieval Warm Period? Tracks Lead To University Of Bern

From the NoTricksZone

By P Gosselin on 2. September 2021

Science scandal: What follows is an excellent overview of how the Medieval Warm Period was once again disappeared from the latest IPCC climate report.


Who Erased The Medieval Warm Period?

Written by: a Die kalte Sonne scientist/IPCC 6th report reviewer
(Translation, edited and subheadings by P. Gosselin)

The latest UN report distorts climate history. The tracks lead to Bern, Switzerland.

In the Middle Ages, it was similarly warm in Switzerland and other parts of Central Europe as it is today. The so-called Medieval Warm Period (MWP) is scientifically well documented in the region: Between 800 and 1300 A.D., many Alpine glaciers shrank dramatically and some were even shorter than today. The tree line shifted upward. Permafrost thawed in high alpine regions that are still firmly in the grip of ice today. Warm temperatures are also clearly evidenced by tree rings, pollen, chironomid fossils, and other geological reconstruction methods.

Controversial temperature curve

It had long been assumed that the medieval warmth might be a regional, North Atlantic phenomenon. However, this has not been confirmed, because the warm phase also occurred in many other regions of the world, for example, on the Antarctic Peninsula, in the Andes, in North America, in the Arctic, in the Mediterranean, in East Africa, China and New Zealand.

Peer-reviewed: Medieval Warm Period global

Together with professional colleagues, we at Die kalte Sonne have evaluated many hundreds of case studies from around the world in recent years and published the syntheses continent by continent in peer-reviewed journals.

Three of the publications have been cited by the Intergovernmental Panel on Climate Change (IPCC) in its recently published 6th Assessment of the Climate report. The medieval warmth was then followed globally by a precipitous drop in temperature. During the Little Ice Age, 1450-1850, the climate cooled to the coldest temperature level of the entire last ten thousand years.

Taping the hockey stick back together

In the new IPCC report, one will unfortunately look for this information in vain. In it one elevates one’s own view of the climate history of the last thousand years. In the summary intended for politicians, a controversial temperature curve is prominently displayed right at the beginning, giving the impression that there were only minimal pre-industrial climate changes in the last two millennia. With the onset of industrialization around 1850, the curve then rockets upward by more than one degree. This mode of representation is also known as the “hockey stick”: The climatically supposedly uneventful pre-industrial period forms the straight shaft of the stick, and at its end, with rapid modern warming, comes the upward blade of the hockey stick. It is therefore a déjà vu, an unnecessary one. The 3rd Assessment of the Climate Report of 2001 already contained a similar field hockey stick pattern, intended to fool politicians into thinking that today’s warming was unprecedented and therefore entirely man-made.

Recent paleoclimatological research confirms Medieval Warm Period

In the last two decades, however, paleoclimatology has made great progress, and data have been diligently collected. From this, more realistic temperature developments were created, with a pronounced Medieval Warm Period and a later Little Ice Age.

All the more bitter now is the relapse into old hockey stick times. How could this happen? What were possible motivations behind the renewed distortion of climate history?

Why back to the hockey stick? PAGES 2k

The questionable new hockey stick temperature curve comes from the international paleoclimatology group PAGES 2k, whose coordinating office is based at the University of Bern in Switzerland. Climate scientist Thomas Stocker, who has contributed to IPCC reports since 1998, also teaches and conducts research at that university. In 2015, Stocker even ran for the overall IPCC chairmanship, but lost to South Korean Hoesung Lee, who just presented the 6th Working Group 1 report. Stocker co-authored the Summary for Policymakers of the IPCC’s 3rd Assessment of the Climate report in which the hockey stick played a prominent role.

Dissent among the PAGES-2k group

A good twenty years later, the resurfaced field hockey stick now comes from Stocker’s university, where he heads the Department of Climate and Environmental Physics. Just a dumb coincidence? There are many indications that the new climate curve may have been a commissioned paper for the 6th IPCC report. Five of the nineteen authors of the papers on the new hockey stick curve are from Bern.

But a significant portion of the PAGES-2k researchers could not technically support the new hockey-stick version and walked out of the group in dispute.

Proof thanks to tree rings

Meanwhile, these dissenting scientists published a competing temperature curve with clear pre-industrial climate changes. Based on tree rings, the specialists were able to prove that summer temperatures had already reached today’s levels several times in the pre-industrial past. But the work of Ulf Büntgen of the ETH Research Institute WSL and colleagues was not included in the IPCC report, although it was published in time for the editorial deadline. Interestingly, the controversial PAGES-2k curve was already included in the first draft of the 6th climate report, although the associated publication had not even formally appeared yet.

How could this be? In the second draft of the Summary for Policymakers, the curve shrank to postage-stamp size, positioned on the edge of a composite larger figure. This was the last version available for comment by the IPCC reviewers, of which a Die kalte Sonne scientist was one of the reviewers. It was all the more surprising, then, when the field hockey stick image suddenly appeared in full size in the final version.

IPCC conceals PAGES-2k controversy

The IPCC concealed from the public the fact that many experts and reviewers consider the curve to be highly problematic. On the one hand, the new hockey stick contains a whole series of outlier data, the use of which is difficult to justify. For example, PAGES-2k integrates a tree-ring dataset from the French Maritime Alps, even though the creators of the original case study explicitly advise against using it for temperature reconstructions. On the other hand, data are omitted that demonstrate strong pre-industrial natural climate variability. Detailed criticisms of this made in the review process of the report and formally published in publications were ignored by the IPCC authors.

That’s how easy it is to rewrite climate history, and hardly anyone notices. Why is this important? Pre-industrial temperature trends are highly relevant to the attribution of modern climate change to man-made factors on the one hand and natural factors on the other.

Since climate models have assigned only negligible natural climate forcings, they can only generate hockey stick patterns. Any real observed pre-industrial warm or cold phase therefore causes problems for the models because they cannot reproduce it. They are designed not to do so from the outset.

Mortally faulty model calibration

This raises uncomfortable questions about their fitness and usability for projecting the future climate. Ultimately, they are uncalibrated simulations that should not be released for future modeling at all, as long as they are still failing on past climate  In other words, if a climate model provides answers to the question of what the past was like that are miles off reality, forecasting the future is likely to be similarly aberrant.

It is particularly peculiar that the climate models of the so-called CMIP6 type that were created specifically for the 6th Climate Report proved to be mostly unusable. Due to cloud modeling errors, they provided temperature histories that were far too hot. Therefore, the IPCC stated that in the current 6th report that it would place more emphasis on the historical temperature development.

Inconvenient issues

However, since this is also – as described – highly controversial, the IPCC is also now virtually flattening its spare tire. In its official press releases, the IPCC largely omits these inconvenient issues. And in most media reports, too, the public hears nothing about them.

Political tactics undermining science

Thus, scientific integrity falls by the wayside. It is only a matter of time before critical climate scientists systematically address the inconsistencies in the filtered IPCC 6th climate report. The incident reveals how political tactics are undermining the IPCC’s scientific integrity and further eroding the trust placed in the institution.

Climate researcher Thomas Stocker declined to comment when asked by WELTWOCHEThis article first appeared in WELTWOCHE Zurich: Die Weltwoche, No. 33 (2021)| 19. August 2021. (Subheadings added by NoTricksZone) 

Also see:
– Pages-2k rebuttal
– MWP Map
– 200 Non-Hockey Stick Charts

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September 4, 2021 2:13 pm

Surprising what a wad of Renminbi will buy you.

Especially if you are an incompetent, venal, Climate “Scientist:.

Tom Halla
September 4, 2021 2:22 pm

I would have suspected Michael Mann.

Ron Long
Reply to  Tom Halla
September 4, 2021 4:11 pm

CNN interviewed Mikey Mann this morning, and he was in full doomsday/tipping point splendor. Hurricane Ida was proof of everything, case closed. What a disgusting mixture of greedy and crazy.

Paul Johnson
Reply to  Ron Long
September 4, 2021 6:49 pm

Many have noted that Ida struck New Orleans exactly sixteen years after Katrina. Have any mentioned that for twelve of those sixteen years (2005-2017) no major hurricanes made landfall in the U.S.? It is the longest “hurricane drought” on record and flies in the face of the doomster’s predictions of “a Katrina every year”.

Last edited 1 year ago by Paul Johnson
Tom Abbott
Reply to  Paul Johnson
September 5, 2021 10:36 am

Those 12 years of no major land-falling huricanes were very hard on the alarmists. They couldn’t find anything to blame on CO2, other than an occasional wildfire, heatwave or drought. It was slim pickin’s back then.

Reply to  Ron Long
September 4, 2021 7:32 pm

Climate scientist makes dire prediction about monster stormsMichael Mann, a lead author of the UN Climate Change report, explains the science that directly connects rising temperatures to the increased frequency and severity of major storms.

Rory Forbes
Reply to  Cam_S
September 4, 2021 8:52 pm

CNN can’t be trusted as a source of anything since what they revealed after Biden was installed in the White House. CNN admitted to 4+ years of outright lies in a premeditated plan to discredit Trump. They aren’t a “news” medium. They’re the media department of the Democratic party.

Abolition Man
Reply to  Rory Forbes
September 4, 2021 9:32 pm

They’re the propaganda wing of the Communist party. There, fixed it for you!

Rory Forbes
Reply to  Abolition Man
September 4, 2021 10:24 pm

A mere distinction without a difference, LOL. I’m happy with either 🙂

John Bell
Reply to  Rory Forbes
September 5, 2021 7:42 am

Democrat, not democratic, they hate democracy.

Rory Forbes
Reply to  John Bell
September 5, 2021 10:22 am

My irony font seems to have been switched off … but thanks for the correction.

Reply to  John Bell
September 6, 2021 6:31 am

It’s only democracy when they win.

Reply to  Rory Forbes
September 5, 2021 10:46 am

They OWN the democRAT criminal party. It’s one of their created terrorist wings.

Rory Forbes
Reply to  Jakelarue
September 5, 2021 12:23 pm

They do appear to have a close relationship with terrorist groups, don’t they? Hey … they just provided some of the worst terrorists on Earth with a made to order arsenal worth $85 billion.

Reply to  Cam_S
September 5, 2021 4:42 am

Rising temperatures? IS Mikey Mann really living on this planet? Has he been to Iceland yet? It’s cold up there! People going to see the volcano are all bundled up.
And in my AO, while we had one day of “warmth” out of 18, it happened to be a cloudy day. Now it’s back to sunshine and clear skies and the “heat” of summer is gone, and I”m about to turn on the furnace a month early!
I suggest shutting off Mikey Mann’s heat for the fall and winter and find out how he likes the “warm” winters without a warm house or office.
What a dork he is. He’s really turning into a cracked record.

Reply to  Cam_S
September 7, 2021 1:39 pm

There’s been a pause of 7 years. Current warming 1.3C per century. Trust the science dude.

September 4, 2021 2:23 pm

Ignoring or rewriting history occurs in more than climate studies. It’s the only way to silence dissent and accuracy when referencing a past that doesn’t agree with your narrative. That’s one definition of propaganda. Tell the “story” often and loud enough and the people will accept it.

Reply to  markl
September 4, 2021 5:04 pm

Read George Santayana Reason in Common Sense.

Progress, far from consisting in change, depends on retentiveness. When change is absolute there remains no being to improve and no direction is set for possible improvement: and when experience is not retained, as among savages, infancy is perpetual. Those who cannot remember the past are condemned to repeat it.

Last edited 1 year ago by Doug Huffman
It doesn't add up...
Reply to  Doug Huffman
September 4, 2021 6:53 pm

As soon as I first saw the new hockey stick diagram in AR6 my memory immediately reminded me that it wasn’t showing the MWP or LIA. I am condemned to repeat that the evidence they were real is far more compelling than this attempt to stomp on history and reality.

Reply to  It doesn't add up...
September 5, 2021 9:39 am

Yes. I put a comment here on the first AR6 post noting that I thought the missing MWP would have been a leading issue. It is nice to see that AR6 hockey stick graph inspired some analyses, and these are getting posted out here for all to see and discuss.

Reply to  markl
September 4, 2021 6:02 pm

I was not around for the Soviet purges, or China’s great famine, and was young during Pol Pot.
I have on many occasions reminded marxists, socialists, and communists about these events.
It’s not about remembering, THEY KNOW.

It is also the same with the batch of greenie climate change alarmists. THEY KNOW about pasts heatwaves, storms, floods, droughts and bushfires.

Both groups just @#$&ing lie. It’s that simple.

Rory Forbes
Reply to  Waza
September 4, 2021 8:57 pm

There isn’t a climate scientist alive who isn’t aware of the fraud and the utter nonsense being exposed daily on this blog. No one but the “True Believers” are taken in buy the “climate change” narrative. It has no basis in science. They’ve been lying for “The Cause” for a generation and more.

Reply to  Rory Forbes
September 7, 2021 1:41 pm

They are guilty.

Reply to  markl
September 5, 2021 4:50 am

We can always hope for one of those prolonged winters that start early and last long past ‘normal” seasonal change dates, along with several years of that. It might confound the “experts” like Mikey Mann because it really is difficult to ignore such things and be dismissive of them.

Tom Abbott
Reply to  Sara
September 5, 2021 10:44 am

Michael Mann has already dismissed any future cooling. He says a decade or two of cooling would not disprove the Human-caused Global Warming hypothesis.

I believe Mann said those things right after it became apparent there was a pause in warming, and people were asking questions about the discrepancy.

Reply to  Tom Abbott
September 5, 2021 10:49 am

Should I maybe send him my gas bill (cooking and heating) to pay? I could use the extra cash, and it seems to me he has plenty of it! 🙂

What I would really like, and sincerely hope that somehow, it happens, is for all these grants grabbers to be snowed in for about six months at a conference of some kind, so that they not only can’t get the doors open, can’t get flights home, and have to forage for food like our distant ancestors were doing.

I still haven’t asked for a DNA test to find out if I have any Heidelbergensis DNA. That would be SO cool!!! I should be doing that….

Tom Abbott
Reply to  Sara
September 7, 2021 10:45 am

I believe the next three-month forecast for your area is cooler than normal. You probably already know that, though.

Bryan A
September 4, 2021 2:23 pm

Just curious…
The top chart depicting the Holocene temperature gradient over the last 15,000 years or so would be Low Resolution.
Has anyone created a temperature gradient chart depicting what the Holocene temperature would look like in High Resolution? What would be the highest and lowest temperatures that would still fit the low resolution curve?

Reply to  Bryan A
September 4, 2021 2:34 pm

Most proxies that go back 15,000 years are low resolution.
It’s not honest to use low resolution in one part of a graph and high resolution in another. (Even though climate “scientists” routinely do this.)

Reply to  MarkW
September 4, 2021 4:45 pm

I totally agree, the satellite era should not be strung on the end of the thermometer era as there is no clear understanding of the mechanism that controls heat distribution globally from tropical, AMO etc. Arctic amplification is the best example.

Chris Hanley
Reply to  Bryan A
September 4, 2021 2:46 pm

Detailed Holocene reconstructions can be found here with further links.

Pat Frank
Reply to  Chris Hanley
September 4, 2021 5:57 pm

There isn’t a single proxy reconstruction that uses physics to derive a temperature from the proxy data.

Every single one of them showing a temperature on the ordinate axis is a scientific crock.

September 4, 2021 2:30 pm

Are any of the IPCC reviewers issued a stamp that says –

Reply to  Mr.
September 4, 2021 3:03 pm

That don’t need to. It’s assumed.

Reply to  Mr.
September 4, 2021 6:38 pm

All of them , except it’s spelt proposition .

September 4, 2021 2:47 pm

Richard Muller, emeritus Professor of Physics UC Berkeley had the first comment on the Die Weltwoche article at provided URL. If you are unfamiliar with Dr Muller, his comments on the original hockey stick, and his work with BEST, there is at some factual reporting in his Wikipedia bio.

Here’s the Google translated version of Prof Muller’s comment from his posted German language comment:

“The IPCC has nothing to do with the climate. He is merely a vicarious agent and panic driver on behalf of the architects of a new world order. There is a climate all over the world and that is why it has been chosen as a major political factor. The IPCC has to manage this factor and publish horror reports. We shouldn’t get into the IPCC and details like the disappearance of the medieval warm period. That just distracts us from the real motives. We should focus much more on the lying climate politicians and drive them all to hell.”

The problem of course with the IPCC is it was only formed and chartered to investigate “human” causes of climate change/AGW. It was political from the outset, with a goal to produce a pre-determined conclusion, and then call the conclusions it made “science.” It is Pseudoscience to be used a epistemological club against skeptical scientists, a club that would lead to their defunding and eventual loss by attrition. Ask Judith Curry.

The pseudoscience got even more so with VP Al Gore using funding and hiring pressures to steer the climate science fraud train towards politcal end goals. First with corrupting pressure on Ben Santer to include attribution language to the 2nd AR, Chapter 8 (where he re-wrote in a human attribution statement without his colleagues consent,) then with the infamous Mann-fraud hockey stick in the 3rd AR, as corruptions of science to produce desired impressions and a climate narrative in the media and politicians unable or unwilling to see the deceptions at work.

The problem are the politicians that this global climate scam has enabled to gain and hold power. And now attempt to consolidate even more power against representative democracies on the road to destroying Western free-market capitalism. That is the hidden driver at work behind the climate scam, a three pronged destructive attack on the West and its power structures that gives most power to the middle class.

  • Destroying free market capitalism, s system that eschews top-down controls (socialism).
  • Destroying democracy that enables this unfettered capitalism.
  • Destroying a free, affluent middle class that demands democracy and freedom that consumes too many resources in the eyes of the global elitists billionaire class.
Last edited 1 year ago by joelobryan
Pamela Matlack-Klein
Reply to  Joel O'Bryan
September 4, 2021 3:16 pm

Muller does sound like his head is on straight. The Wikipedia article seems to be trying to present him as a CAGW advocate through sloppy syntax.

Anthony Banton
Reply to  Pamela Matlack-Klein
September 4, 2021 3:22 pm

There is no need to.
He is an advocate of AGW, of the “C” part, I don’t know – as that is a term invented here….

Call me a converted skeptic. Three years ago I identified problems in previous climate studies that, in my mind, threw doubt on the very existence of global warming. Last year, following an intensive research effort involving a dozen scientists, I concluded that global warming was real and that the prior estimates of the rate of warming were correct. I’m now going a step further: Humans are almost entirely the cause.”


Reply to  Anthony Banton
September 4, 2021 3:45 pm

You couldn’t be more wrong about the “mostly” human cause. That is entirely an artifice created to exploit the millennium cycle of warm periods, the one we are now in.
The political climate scammers were depending on now failed “peak oil” predictions for the 2000-2010 range. Predictions that the US fracking boom for tight oil and natural gas reserves completely destroyed by moving them out at least 3-4 decades (probably more). The original environmental part of the climate scam was to stop coal mining and coal burning. That process is underway in the US, not for the climate scam, but because of cheap natural gas made abundant by fracking and associated technologies.There is now abundant recoverable oil and natural gas, no peak oil in sight, much to dismay and detriment to the climate scammers’ plans for corralling the world economic wealth in to tightly controlled centralized governments, governments answerable only to the elitist political ruling class. Not just in the US but around the world. Hence the now political imperative to stop fracking from spreading. The truth of those statements above is evident in their total resistance by the climate scammers to nuclear power.

China’s rise and economic power through use of fossil fuels has been the other fly-in-the ointment to the climate scammers’ plans. China is still rapidly expanding coal burning and so is India. Places the climate scammers can’t touch, where governments can play propagandist lip service to the climate scam, whilst the Western adversaries destroy themselves at the hands of the baizuo.

Wake up man!.

Last edited 1 year ago by joelobryan
Zig Zag Wanderer
Reply to  Anthony Banton
September 4, 2021 3:51 pm

He is an advocate of AGW, of the “C” part, I don’t know – as that is a term invented here….

The ‘C’ part was invented here? I assume you mean WUWT.

That’s great! That means that Global Warming isn’t Catastrophic. No need to do anything, then. We can stop all the alarm, there won’t be any catastrophe.

I mean, we (‘here’) knew that anyway, but it’s great to see you admit it.

Last edited 1 year ago by Zig Zag Wanderer
Bill Toland
Reply to  Zig Zag Wanderer
September 4, 2021 11:26 pm

I too thought that Anthony Banton’s comment was bizarre. I haven’t heard that particular conspiracy theory before.

John Phillips
Reply to  Zig Zag Wanderer
September 5, 2021 3:50 am

You really cannot imagine anything between ‘catastophic’ and ‘nothing to worry about’?


Reply to  John Phillips
September 5, 2021 6:56 am

If it isn’t catastrophic, there’s no need to kill billions of people by forcing wind and solar on the world.

Reply to  Anthony Banton
September 4, 2021 4:02 pm

Another true believer who is convinced that whatever caused the warming from 1800 to 1950, stopped abruptly and CO2 took over.

This guy sounds a lot like Mueller, who goes on and on about how he too was once a skeptic.
The problem is, looking at his writings and talks, shows that he’s been a true blue believer in CAGW from the beginning.

BTW, if global warming isn’t catastrophic, then there is no reason to do anything about it. Unless you are one of those who worship in the cult of Gaia who believe that any change, no matter how trivial, that is caused by man is EVIL.

Last edited 1 year ago by MarkW
Reply to  MarkW
September 4, 2021 5:14 pm

To add to that, this is exactly why the Scientific Null Hypothesis exists. It’s to stop crap scientists, scientific dufuses, snake oil salesmen, and fraudsters and other assorted criminals from claiming exactly that – that the baseline suddenly went flat around 1950.

Can’t do that Anthony, and neither can the voices in your head, and neither can the voice of authority to which appeal.

Last edited 1 year ago by philincalifornia
Reply to  philincalifornia
September 5, 2021 9:25 pm

I’ve been long trying to figure out what the Null Hypothesis is for climate change. Back when it was global warming it should have been easy: it’s getting warmer; whether it was warmer or drier was largely irrelevant.

To be honest, they jumped the shark when they went to climate change as it meant it could be warmer or colder, wetter or drier, all at the same time. This nullified any notion of an Null Hypothesis – you simply cannot prove anything as everything now fits.

It has literally become as legitimate as the Flying Spaghetti Monster.

Reply to  MarkW
September 5, 2021 11:07 am

You want to take away the left’s(cemocRATS) only talking point they have left

Izaak Walton
Reply to  Joel O'Bryan
September 4, 2021 4:50 pm

Am willing to bet that the commentator is a different Richard Muller. It is possible for two people to have the same name.

Reply to  Izaak Walton
September 4, 2021 6:15 pm

So I guess you wrote a parallel version of The Compleat Angler?

Reply to  Izaak Walton
September 4, 2021 10:02 pm

So is there another Izaak Walton who is not catastrophist??? lol

Reply to  aussiecol
September 5, 2021 5:24 pm

If you’re still here mate, look up Izaak Walton Killam. IMO, he’s the best one – he funded really great Graduate and Post-Doctoral Scholarships for all the major Canadian Universities. I know this very well, and you can guess the rest for me.

Reply to  Izaak Walton
September 5, 2021 12:03 pm

I rarely agree with anything that Izaak says, but he’s probably right here. Although Richard Muller has been a critic of Mann’s hockey stick, the Richard Muller that commented on the Weltwoche article is a regular German language commenter on that German site on issues other than climate.

Tom Abbott
Reply to  Joel O'Bryan
September 5, 2021 10:56 am

“The pseudoscience got even more so with VP Al Gore using funding and hiring pressures to steer the climate science fraud train towards politcal end goals. First with corrupting pressure on Ben Santer to include attribution language to the 2nd AR, Chapter 8 (where he re-wrote in a human attribution statement without his colleagues consent,)”

Great post, Joel.

Ben Santer ought to be prosecuted for scientific fraud. His lie has fooled millions of people, and has cost the world hugh sums of money because of the fear that lie has instilled in those who don’t know any better.

A dispicable lie, Mr. Santer. You, and people like you, are the problem. Liars like you, sow confusion and make things worse, not better.

And now it looks like we have more Ben Santers in this new IPCC report claiming certainty of human involvment in making the Earth’s climate worse than normal. High CONfidence, they say. What a joke!

And none of them can produce one bit of evidence to back up their claims. They are just blatantly lying to the world.

One thing we can do is to continue to call them liars. They can’t prove they are not liars because they don’t have any evidence to back up their lies.

September 4, 2021 3:00 pm

Have they got rid of the Eemian and destroyed the Trafalgar Sq hippo in the Natural History Museum too?

CD in Wisconsin
September 4, 2021 3:14 pm

“Who controls the past controls the future: who controls the present controls the past.”
— George Orwell.

It is nothing short of disgusting watching the IPCC taking is cues from Orwell’s novel.

Reply to  CD in Wisconsin
September 5, 2021 9:27 pm

Animal Farm is in there too.

September 4, 2021 3:15 pm

SOS = Same old Sh*t
Although WSJ thinks the new report isn’t quite so bad as the last….
Editorially, they’ve been pretty shaky lately, on following actual, ‘real’ climate science. Perhaps this marks the start of an improvement in their policy?

Thomas Gasloli
September 4, 2021 3:19 pm

“The incident reveals how political tactics are undermining the IPCC’s scientific integrity….”

Did the IPCC ever have scientific integrity?🤔

Reply to  Thomas Gasloli
September 4, 2021 3:59 pm

Yes, AR1. Then the scammers got to work when it didn’t deliver the narrative they were hoping for. Too many stodgy, old-school ethical scientists wrote the FAR, and Republicans still controlled the US government political structures. The USSR bogeyman had evaporated post-92, and the elitists needed a new bogeyman to scare the public. Clinton-Gore and climate scam came to the rescue.

Last edited 1 year ago by joelobryan
Reply to  Joel O'Bryan
September 5, 2021 9:29 pm

I’m inclined to agree. I had a copy of the original draft, printed, where the executive summary had a different conclusion to the finalized version. But that’s late 1990s and it’s long gone now. Once that summary for policy makers was changed it was all down hill.

September 4, 2021 3:30 pm

What is the ideal temp and CO2 content? Can anyone reveal these numbers?….must be some kind of secret?

Reply to  Anti-griff
September 5, 2021 8:57 am

I’ve been asking those questions for years and still haven’t gotten an answer.

Carlo, Monte
Reply to  TonyG
September 5, 2021 11:35 am

The answers are closely held secrets, need-to-know and all…

September 4, 2021 3:39 pm

A William Tell Overturn, perhaps?

Zig Zag Wanderer
September 4, 2021 3:46 pm

the warm phase also occurred in many other regions of the world, for example, on the Antarctic Peninsula, in the Andes, in North America, in the Arctic, in the Mediterranean, in East Africa, China and New Zealand.

Yeahbut…. These are all regional places, see. It kinda like just happened in one place only, except, like, a few one places. But sort of only in one region, except all over the world. Sort of. Like…

Reply to  Zig Zag Wanderer
September 4, 2021 4:08 pm

I can assure you, every part of this world that was not covered by these proxies never warmed.

How do I know this, the sacred proxies have so proclaimed.

Ben Vorlich
Reply to  Zig Zag Wanderer
September 4, 2021 11:59 pm

There’s this resource showing papers covering the MWP and what they show.


Abolition Man
September 4, 2021 3:58 pm

People who achieve degrees in the sciences, then start altering or hiding data, are NOT scientists! They may be ideologues or religious fanatics, but a REAL scientist must maintain a skeptical outlook to truly pursue the scientific method!
In the same manner, doctors who withhold effective treatments from their patients are NOT doctors! They may be murderers or just quacks, but the last year and a half has revealed that far too many are primarily just street level dealers for the pharmaceutical companies; as supposed “climate scientists” are just shills for the UN IPCC and the rich elites behind the curtain!

Peter W
Reply to  Abolition Man
September 4, 2021 4:22 pm

“doctors who withhold effective treatments from their patients are NOT doctors!” Having suffered from serious allergies most of my life, and had my symptoms mis-diagnosed time after time, my observation is that they are all too often ignorant and unwilling to learn! I see many “warmists” the same way.

Clyde Spencer
Reply to  Peter W
September 4, 2021 9:31 pm

Good doctors are like good automotive mechanics. They are worth their weight in gold! However, if you get a poor mechanic, you are free to find another. In fact, you would be a fool not to do so. The same is true of doctors. If you don’t like your doctor, find another one! Unless, of course, you signed up for Obamacare.

Reply to  Peter W
September 5, 2021 11:10 am

It’s the left’s religion….period

September 4, 2021 4:10 pm

It is still amazing to me that neolithic people crawled under European glaciers with their artifacts to die.

They must have done this as the impossibility of any climate warming exposing them under shrinking glaciers until modern humans released CO2 in the 20th century (as shown by IPCC reports) precludes any other explanation.

Reply to  Doonman
September 4, 2021 6:02 pm

Yeah, that’s the ticket…. crawled under the glaciers.

Our ancestors were tough! No soy boys in that bunch.

Dave Fair
Reply to  Doonman
September 4, 2021 6:19 pm


Ben Vorlich
Reply to  Doonman
September 5, 2021 12:04 am

They were actually hunting the now extinct ice tunnelling caribou, which died out leaving no trace about 8k years ago.

Joe Crawford
Reply to  Doonman
September 5, 2021 12:19 pm

Yea, they must have also carved out big caves for them trees to grow in as well. You know, the trees that left all them stumps under the glaciers.

Pat from kerbob
Reply to  Doonman
September 5, 2021 4:44 pm

Actually, they were logging the trees growing under those glaciers to build churches and other structures under the glaciers because that’s just how they rolled

Gilbert K. Arnod
September 4, 2021 4:49 pm

At this point, I am loathe to accept anything put forward by the IPCC. Their past “shenanigans” regarding past temperatures make me suspicious of anything they publish… Nullus in Verba .

September 4, 2021 5:25 pm

Creative accounting, change the figures and remove unwanted record data to produce modelling that appears to reveal a warming trend.

See hacked IPCC emails released in two batches just before the IPCC Copenhagen Conference containing exchanges between the manipulators.

And check Christopher Monckton’s audit of the modelling that also exposed the deliberate errors and omissions.

September 4, 2021 5:45 pm

Is this a new version of Cluedo?

Dr Mann in the University of East Anglia with a hockey stick?

Reply to  leitmotif
September 4, 2021 6:41 pm

They couldn’t put Dr. Mann in real Cluedo, even though the pieces do have shiny heads. It would make it too easy having to guess just the room and weapon, and the weapon, as you allude to would be a cinch too. BTW, it’s called Clue over here.

Screen Shot 2021-09-04 at 6.38.45 PM.png
September 4, 2021 5:51 pm

Paranoia mixed with delusions of adequacy.

One paragraph from your own blog, completely over throws hundreds of years of scientific advancement.

September 4, 2021 5:59 pm

I’m pretty sure you don’t know what “redundant” means but I could point you in a slightly better direction as far as the profitability of free markets.
Compare the wealth and prosperity of, for instance, the United States in 1750 to 2000 or any similar date one might choose.
The poorest people today have a standard of living and access to innovations even the richest people 250 years ago couldn’t even dream of.
Socialism meanwhile can barely keep its head above water and only then by piggybacking on free markets. Left to its own devices it consumes whatever wealth it inherited and eventually implodes. Every time.
Perhaps the mods delete that tripe because it’s the gruel of fools.

September 4, 2021 6:13 pm

Rhetorical question….Can someone explain to me, again, how we know tree ring data is “reliable” prior to the invention of the thermometer in 1714, thus giving the highly accurate climate average temps quoted by the IPCC for the last couple of millennia, but somehow is unreliable in the 20th Century until present….Of course after 1714, (actually about a 100 years later) we have many highly accurate climate records and forestry records which we can assess growth rings with increased confidence….
Instead we have “the divergence problem”….
Likely tree rings are a poor proxy for temperature and a better one for rainfall….or a combination thereof.

Last edited 1 year ago by DMacKenzie
Reply to  DMacKenzie
September 4, 2021 8:03 pm

Beyond that, trees can only record the quality of the growing season. They record nothing for any time period where they are dormant.

Chris Hanley
Reply to  MarkW
September 4, 2021 8:49 pm

Agree although the radiocarbon dating of physical remains of past tree-lines at latitudes and altitudes can give clues.

Dave Fair
September 4, 2021 6:22 pm

Breathtaking economic ignorance.

September 4, 2021 6:33 pm

The mods on here don’t delete stuff like that. Look at the gibberish they allow from griff and loydo. I think you’re making that up, but willing to be proved wrong.

Trying to Play Nice
Reply to  philincalifornia
September 6, 2021 10:29 am

I remember seeing that drivel posted here a week or two ago.

September 4, 2021 6:49 pm

This post shows how Pages 2K global mean flattens the past and how the mean compares to Arctic and Antarctic temperature reconstructions over the past 2000 years. https://andymaypetrophysicist.com/2020/05/02/global-mean-temperature-flattens-the-past/

Reply to  Renee
September 4, 2021 7:07 pm

The data used by Pages 2K to calculate the global means is based on 7000 proxy records. The majority (59%) of the records are tree rings located primarily in the Northern Hemisphere. Nuekom, 2019, acknowledges that tree ring records are detrended and therefore, do not capture centennial and multi-centennial trends. Furthermore, he confirms this problem compounds backwards in time and results in underestimation of low-frequency variability especially during the first millennium of the Common Era. This would be during warm period analogs such as the MWP and RWP. The Pages 2K global mean calculations are driven by NH proxy data with an overemphasis on tree ring proxies which is the primary reason for the flattening in the past.

Christainsen et. al, 2017, has an excellent analysis and discussion on the lack of preservation of low-frequency or longer-term variability in proxy records and large-scale temperature reconstructions. He states that tree ring records have absolute annual dating control and can be cross dated with other chronologies. He confirms tree ring data has problems related to preserving the very low frequencies and longer-term trends. Additionally, he states that averaging proxies acts as a low-pass filter resulting in the signal being “flattened out,” thus preventing the true magnitude of cold and warm periods in temperature reconstructions from being captured. Both issues apply to Pages 2K global mean across the RWP and MWP and therefore, should not be directly compared to the Present centennial warming in absolute temperature terms.

Reply to  Renee
September 4, 2021 8:05 pm

Anyone who attempts to use tree rings as a temperature proxy has merely demonstrated that they know nothing about biology.

Reply to  MarkW
September 4, 2021 9:12 pm

Tree rings need to be placed in perspective and should not dominate or flatten the past 2000 years. There are other proxies and historical data that document centennial temperature fluctuations like the current uptick we are currently experiencing.

Reply to  Renee
September 5, 2021 7:00 am

Since tree rings are not temperature proxies, they should not be used in a temperature reconstruction. Period.

September 4, 2021 8:00 pm

You make the claim that Exxon issued billions in new stock and this destroyed shareholder value. If you have actual evidence of Exxon doing this, I suggest you talk to any number of Attorneys General, as such activity is completely illegal.

I’m not up on what Exxon did or did not do financially in 1999, but what companies do is declare stock splits. For example if the do a two for one split, everyone who has one share of stock will have that one cancelled and two new shares issued in it’s place. The stock holder loses nothing in value.

Is there anything you know, that is actually true?

Reply to  MarkW
September 5, 2021 5:31 pm

He also seems to be blissfully unaware, as are most jealous nitwits, that the industry has created wealth, prosperity and associated taxation for tens of thousands of individuals who make a product, or products that people want to buy.

Clyde Spencer
September 4, 2021 9:35 pm

You provide a good role model for redundancy.

Coeur de Lion
September 4, 2021 10:18 pm

Do read Donna Laframboise on the litany of IPCC dishonesties and the barefaced lying by Rajendra Pachauri. Why its ever been authoritative is remarkable.

Rory Forbes
Reply to  Coeur de Lion
September 4, 2021 11:21 pm

The Delinquent Teenager Who Was Mistaken for the World’s Top Climate Expert
By Donna Laframboise, for those who are interested. Great read!


“Blooming brilliant. Devastating” – Matt Ridley, author of The Rational Optimist

“…shines a hard light on the rotten heart of the IPCC” – Richard Tol, Professor of the Economics of Climate Change and convening lead author of the IPCC

September 4, 2021 10:46 pm

Still the iconic picture about the dissenting view in paleoclimotology about the PAGES2K reconstruction:
comment image

from this paper:


Nothing to see here…

Reply to  Ron
September 5, 2021 8:43 pm

There are a couple of important points to consider regarding this publication.

1) Both EA and EA+ reconstructions are for the NH only.
2) Both EA and EA+ are for June, July, and August only.
3) Both EA and EA+ show it being anomalously cool during most of the MWP (1100-1300).
4) Both EA and EA+ have no extended LIA period.
5) PAGES19 is a global reconstruction.
6) PAGES19 is not being challenged.

I’ll leave you with this quote from the publication.

If pre-industrial summers during Roman and medieval times, in the relative absence of volcanic forcing, were sometimes as warm as modern ones, the effects of anthropogenic greenhouse gases could be larger than anticipated.

Last edited 1 year ago by bdgwx
Reply to  bdgwx
September 7, 2021 11:19 am

They could but they don’t have to.

to 1 and 5) yes, cause there is reliable data there. The integrity of the PAGES19 data assembly has been challenged and is with this publication. Doing a global reconstruction doesn’t mean that one should with the data available.

to 2) it is tree ring data. Therefore, that is the months you get.

to 3) you give a wrong interval for the MWP. I can only guess if on purpose or not.

to 6) PAGES19 data collection for the NH is challenged as the figure clearly states.

Mike Maguire
September 4, 2021 10:56 pm

For the Medieval Warm Period compared to today below:
Red balloons showed it was warmer.
Blue was colder than today(in that study)
Green was wetter/more precip
Yellow was drier

If you go to the link below, you can hit those individual balloons and get each individual study:

Screenshot 2021-09-05 at 00-53-47 Antartica Ice Melt - MarketForum.png
Mike Maguire
September 4, 2021 11:07 pm


Over 100 studies from the Medieval Warm Period, most of which show the planet was this warm or warmer 1,000 years ago. It was also this warm 2,000 years ago during the Roman Warm Period and also just over 3,000 years ago, during the Minoan Warm period.
Medieval Warm Period Project:

MWP-CWP Qualitative Temperature Differentials – CO2 Science

Where did the data from the bar graphs above come from so that we know that this is the authentic science vs the one that the MSM and dems describe with the fake climate crisis(where they can’t show the data to prove)?
List of Scientists Whose Work We Cite:
List of Research Institutions Associated With the Work We Cite

Screenshot 2021-09-05 at 01-03-05 Antartica Ice Melt - MarketForum.png
Anthony Banton
Reply to  Mike Maguire
September 5, 2021 11:29 am


There needs to be a time-scale attribution to those studies (the map) as they do not reflect the same synchronous time periods.
See my post below for the study which does take that into account.
The MWP was not a globally synchronous warming event and is explained by natural variation.

Reply to  Anthony Banton
September 5, 2021 1:06 pm

You’re being dishonest. While there are differences in the timing of the peak years of the MWP, some owing to errors inherent in dating paeological samples, the studies do show warming throughout the majority of the planet during the MWP.

Reply to  Meab
September 5, 2021 8:15 pm

Which studies that publish a global temperature reconstruction show elevated temperatures during the 1100-1300 period? I’d like to review them if you don’t mind.

Last edited 1 year ago by bdgwx
Reply to  bdgwx
September 7, 2021 11:22 am

First, wrong time period, second, there are studies published one after the other for the different continents. Not done yet, but in progress.

What do you get if you add all five together?

Reply to  Ron
September 7, 2021 1:32 pm

That is the right period. Read the works by Hubert Lamb who first discovered the anomalous warming in the North Atlantic and coined the name MWP (or more precisely the Medieval Warm Epoch) in 1965 to describe it. He focused on 1100-1300 and felt it peaked in the 1200’s. All global temperature reconstructions I’ve seen are consistent with the MWP, but inconsistent with claims that that the global temperature behaved the same as the North Atlantic region.

Reply to  bdgwx
September 7, 2021 7:45 pm

Just a brief google images search for MWP contradicts this claim. And wildly so.

Reply to  Ron
September 8, 2021 11:39 am

Which image are you looking at? The ones I’m looking from Hubert Lambs research show the MWP between 1100-1300.

Reply to  Anthony Banton
September 6, 2021 6:37 am

That an event that covered 400 to 500 years, did not start on the same day all over the world, is not evidence that the event was not world wide.

Reply to  MarkW
September 7, 2021 11:25 am

That just is unmasking the bias in the AGW scheme argumentation.

Cause it is totally okay that the arctic is warming faster than the rest oft the planet now for AGW but if the MWP is not synchronous all over the planet that is a “debunking” argument for its existence.

Hypocrisy at its best.

Reply to  Ron
September 7, 2021 1:38 pm

I think you may be misunderstanding what is meant by “synchronous” in this context. It just means that the global average moves in the same direction as a particular region. In this case the region in question is the North Atlantic which is what the MWP is referring to. See the works by Hubert Lamb who first discovered the phenomenon and pioneered the research on it. Lamb never said the MWP was a global event. In fact, he said the opposite. If there is any bias or revision of history it is by the blogosphere who misrepresented Lamb’s research. The MWP is real. Its existence is consistent with global temperature reconstructions. What is inconsistent with global temperature reconstructions is that the there was a significant global scale warming event.

Last edited 1 year ago by bdgwx
Reply to  bdgwx
September 7, 2021 7:54 pm

The accumulation of local temperature reconstructions all over the globe are indicating otherwise.

Reply to  Ron
September 8, 2021 11:42 am

Can you post a link to a global temperature reconstruction that shows that the global temperature behaved the same way as it did in the North Atlantic region during the MWP?

James F. Evans
September 4, 2021 11:10 pm

Who Deleted The Medieval Warm Period? Tracks Lead To University Of Bern
Sorry, can’t erase history.

The dishonesty never stops.

Philip Mulholland
September 5, 2021 12:00 am

The incident reveals how political tactics are undermining the IPCC’s scientific political integrity

Last edited 1 year ago by Philip Mulholland
September 5, 2021 12:47 am

I’ve seen this subtly mendacious article before, and it relies on confusing a tax write-off (deducting the costs of doing business from taxes) and a subsidy (an outright cash payment from the State). Furthermore, it fails to account for the enormous payroll taxes paid by Exxon over the years.

Tom Abbott
Reply to  Graemethecat
September 5, 2021 11:15 am

Biden can’t seem to tell the difference between a tax-write off and a subsidy, either.

Anthony Banton
September 5, 2021 12:51 am
Reply to  Anthony Banton
September 5, 2021 9:03 am

Mendacious crap from Anthony Banton. The MWP was global, as shown by the map posted by Mike Maguire above.


Anthony Banton
Reply to  Graemethecat
September 5, 2021 11:25 am

Try reading the abstracts of the papers connected with the map.
The red dots on that map are NOT for the same synchronous period (1000-1200AD)

This is (so far) the definitive MWP study…

“Multi-decadal to centennial variability.
Temperatures did not fluctuate uniformly among all regions, highlighting the regionally specific evolution of temperature at multidecadal to centennial time scales. However, the period from around ad 830 to 1100 generally encompassed a sustained warm interval in all four Northern Hemisphere regions. In South America
and Australasia, a sustained warm period occurred later, from around
ad 1160 to 1370. In the Arctic and Europe, temperatures were relatively high during the first centuries ad. Most other reconstructions are too short to infer temperatures before around ad 1000. The transition to colder regional climates between ad 1200 and 1500 is evident earlier in the Arctic, Europe and Asia than in North
America or the Southern Hemisphere. Differences among regions could reflect non-forced variations involving the major modes of atmospheric variability. By around ad 1580, all regions except Antarctica entered a protracted cold period. Apart from intervals of relative regional warmth, especially during the eighteenth century,
cold conditions prevailed until late in the nineteenth century.”
“Our regional temperature reconstructions also show little evidence for globally synchronized multi-decadal shifts that would mark well-defined worldwide
MWP and LIA intervals. Instead, the specific timing of peak warm
and cold intervals varies regionally, with multi-decadal variability resulting in regionally specific temperature departures from an
underlying global cooling trend.”
comment image

Please find and link a full peer-reviewed study that connects all warm events globally into the putative 1000-1200 MWP timeframe such that they were synchronous … as is AGW now.

Reply to  Anthony Banton
September 5, 2021 12:05 pm

Moving the goalposts again, are we? I’m pleased that you now accept that the MWP was indeed global, at least.

Why should a climatic era be synchronous everywhere?

Reply to  Graemethecat
September 5, 2021 12:58 pm

I’m pleased that you now accept that the MWP was indeed global, at least.

No. He explicitly states the opposite. As Climate Science has done, and as it has been explained to you deniers numberless times.

Reply to  nyolci
September 5, 2021 1:21 pm

“Temperatures did not fluctuate uniformly among all regions, highlighting the regionally specific evolution of temperature at multidecadal to centennial time scales. However, the period from around ad 830 to 1100 generally encompassed a sustained warm interval in all four Northern Hemisphere regions. In South America and Australasia, a sustained warm period occurred later, from around
ad 1160 to 1370.”

Don’t forget to take that big red nose and white makeup off before you go to bed tonight, and take care not to trip over those long, floppy shoes.

Reply to  Graemethecat
September 5, 2021 4:18 pm

1160-1370 does not even overlap 830-1100 partially.

Reply to  nyolci
September 5, 2021 3:16 pm

Ah yes, a single paper, so long as it is by a scientist that nyolci agrees with, trumps thousands of papers by climate deniers.

Reply to  MarkW
September 6, 2021 4:30 am

A few corrections, as usual:

a single paper

No. There are a lot of papers, including those Maguire always comes up with. This was given as a good one for reading.

scientist that nyolci agrees with

My agreement (just as yours) is irrelevant in science.

thousands of papers by climate deniers.

No, those papers were from scientists, and contrary to all the bullshiting here, they don’t show MWP was global(ly warmer than today).

climate deniers

No. Science deniers. You can’t really deny climate.

Reply to  nyolci
September 6, 2021 5:36 am

One day, if you’re lucky, you might grow up.

Reply to  nyolci
September 6, 2021 6:39 am

The point is that you exclude all scientists that you disagree with. Then surprise surprise, the scientists that are left all agree with you, and that proves you are right.

Actually they do show that the MWP was global and warmer than today, but because that’s not what you want to believe, you ignore them.

Reply to  MarkW
September 6, 2021 8:27 am

Can you post a link a few studies that provide a global temperature reconstruction showing that it was than today?

Reply to  MarkW
September 6, 2021 10:26 am

“you exclude all scientists”
No. This is simply false.
“Actually they do show that the MWP was global and warmer than today”
Have you tried reading at least a few of those papers that are featured on Maguire’s bullshit page? FYI I have, and they do not support your assertion. My guess is that the selection criteria were something like this: peer reviewed + MWP mentioned. Regardless of what they actually showed. One paper was about some Sub Saharan region where the MWP was synchronous with dry conditions. Of course the paper didn’t say it was warmer that time, it didn’t say much about temperature at all.

Reply to  Anthony Banton
September 6, 2021 5:35 am

What a ridiculous comment. Why should “all warm events globally” be synchronous? Current GW is not synchronous globally – BEST found one third of the sites in their original study showed cooling.

Reply to  DaveS
September 6, 2021 6:28 am

Resident clowns nyolci and Banton have already been shown to have lied about the global extent of the MWP, so they are forced to move the goalposts with their drivel about synchrony.

Reply to  DaveS
September 6, 2021 7:03 am

The context of “synchronous” here is in regard to the timing of each local warm event. Were they synchronous enough that the global temperature increased by a significant amount and stayed high for a couple hundred years as well? When all of these local warm events are connected together to form a global picture the answer to that question is mostly no.

Charles Fairbairn
September 5, 2021 1:43 am

It seems to me that nobody (yes- nobody) talks about the Hydrological cycle and it’s influence on the climate. There being a sinister political closing down of any discussion on this important aspect.

Of course, the reason is obvious; as if you do look at the workings of this cycle, which is essentially a Rankine Cycle you find that the whole question of CAGW falls out of bed as being total nonsense.

With the political nature of the IPCC in mind the whole debate becomes quite clear as merely a left wing/marxist agenda to destroy democratic capitalism and obtain the global levers of power through the control of energy.
Anyone believing that the IPPC is a credible scientific institution is either naive or dishonest.

Eric Vieira
September 5, 2021 2:45 am

Here are some names: Prof. Thomas Stocker (Uni Bern) is co-chairman of the IPCC Working Group I. His pupil is Prof. Reto Knutti (ETH Zurich). Both of them are climate change promoters. Both of them place model calculations above experimental measurements and verification. Pat Frank also showed in WUWT and a peer reviewed paper that they have no idea what uncertainty and error estimations are, which completely invalidate the climate models. The glacier expert Christian Schlüchter (also Uni Bern) who showed contradicting evidence to alarmist theory was also put into early retirement. Guess who might have made arrangements for that… Now, both at Uni Bern and ETH there is a “new generation” of young climate science Profs with only a handful of “publications” (supporting of course the alarmist narrative), who get these academic positions, sometimes without even having studied physics. On top of that they are constantly awarding each other research prizes for “work” which mostly boils down to religious repetition or justification of the official climate change mantra. The ETH is in danger of losing it’s reputation and that’s really a shame. Lyssenko must be laughing in his grave…

Last edited 1 year ago by Eric Vieira
September 5, 2021 8:30 am

Together with professional colleagues, we at Die kalte Sonne have evaluated many hundreds of case studies from around the world in recent years and published the syntheses continent by continent in peer-reviewed journals.

Wonder why no citations?

Die kalte Sonne, meaning ‘the cold Sun’ in German, was a book published about a decade ago predicting massive cooling during solar cycle 24 due to low solar output (a bit like David Archibald did here). The low solar output duly occurred but unfortunately for the predictions, lower temperatures did not; in fact, these rose substantially throughout solar cycle 24, making it the solar cycle with by far the warmest average global surface temperatures in the instrumental record.

It would be interesting to hear an account from the people at Die kalte Sonne as to why it is they think their predictions failed so miserably.

Last edited 1 year ago by TheFinalNail
Al Miller
September 5, 2021 10:50 am

It becomes a nasty fight when foe is unafraid of the most brazen lie and will repeat it endlessly and with widespread help.
As i’ve often said WWIII is already upon us softly brainwashing our children over time.
I fear only a major uprising will quell it this time.

Gordon A. Dressler
September 5, 2021 11:34 am

A trick learned at the knee of Michael Mann, currently a member “in good standing” of the US “National Academy of Scientists”.

The farce continues.

Tom Abbott
September 5, 2021 11:57 am

From the article: “On the other hand, data are omitted that demonstrate strong pre-industrial natural climate variability. Detailed criticisms of this made in the review process of the report and formally published in publications were ignored by the IPCC authors.

That’s how easy it is to rewrite climate history, and hardly anyone notices. Why is this important? Pre-industrial temperature trends are highly relevant to the attribution of modern climate change to man-made factors on the one hand and natural factors on the other.”

You can apply this same argument to the instrument-era regional surface temperature charts from all around the world that show the same benign temperature profile, where it was just as warm in the Early Twentieth Century as it is today.

When we have data that shows it was warm all over the planet during the Medieval Warm Period, we can then conclude the Medieval Warm Period was global.

The same goes for the regional surface temperature data from around the world. If they show the same temperature profile all over the world, then *that* is the true temperature profile of the globe.

The regional surface temperature charts from all over the world show us we have nothing to fear from CO2, because it is not any warmer now than it was in the recent past when CO2 was not a factor. We now have more CO2 in the air than in the Early Twentieth Century, but according to the regional surface temperature charts, we are not any warmer today than then, despite CO2 increasing.

The only thing showing unprecedented warming is the bastardized computer-generated global surface temperature record. If the alarmists didn’t have this lie, they wouldn’t have anything.

Alarmist Climate Science = Lies All the Way Down

Reply to  Tom Abbott
September 5, 2021 2:58 pm

“That’s how easy it is to rewrite climate history, and hardly anyone notices.”

Let’s expand on this. Hubert Lamb pioneered the research on the MWP and even coined the name (technically the variation Medieval Warm Epoch) in 1965. Lamb had said all along that the MWP was a phenomenon primarily effecting the periphery of the North Atlantic and especially Europe. In fact, he said that many parts of the world actually cooled during the period 1100-1300 AD which was the period designated by Lamb as the MWP. And we now know that the AMOC was the likely culprit. So how exactly did the blogosphere rewrite history and start claiming that the global mean temperature increased by the same amount as what happened in the North Atlantic?

When we have data that shows it was warm all over the planet during the Medieval Warm Period, we can then conclude the Medieval Warm Period was global.”

Really? Even the NTZ website has a couple of pages dedicated to linking to hundreds of studies with reconstruction from all over the world that when combined and time aligned show no global MWP event. Perhaps you could link to a few studies that actually publish global mean temperature reconstructions. I cannot emphasize the word global enough here.

Reply to  bdgwx
September 7, 2021 10:41 pm

Even the climate activist infested wikipedia says that Hubert Lamb said the MWP was from 1000-1200.:
But why not looking at the initial study:


Evidence has been accumulating in many fields of investigation pointing to a notably warm climate in many parts of the world, that lasted a few centuries around A.D. 1000–1200…

You are posting false claims.

And yeah, there is only one global reconstruction so far and you know it that is why you’re coming up with it all the time!

But that is the questionable PAGES19 which McIntyre and Büntgen et al. with other former of the PAGES2K consortium are challenging for good reasons like using data from papers where the authors themself say it is unsuitable for temperature reconstruction.

And btw, surprise, research moves on so the up to date estimate for the MWP is more like 900-1150 which is well within error margin of the initial claim by Lamb who used historical records as one of his primary sources.

Reply to  Ron
September 8, 2021 12:06 pm

I did read the publication. His primary focus in the publication is England of which the warm period was from 1100-1300. I’m completely agreeable and amendable to using the broader region and 1000-1200 as the definition of MWP since that does appear in the abstract and because he does have commentary, albeit less focused, on the broader North Atlantic region. Perhaps it would be better to just say the MWP is 1000-1300 in that case.

The crux of the problem still remains. No temperature reconstruction shows that this 1000-1300 period was accompanied by a globally synchronous response.

Last edited 1 year ago by bdgwx
Reply to  bdgwx
September 9, 2021 6:24 pm

The crux of the problem still remains. No temperature reconstruction shows that this 1000-1300 period was accompanied by a globally synchronous response.

Absence of scientific reference is not absence of presence. That is a logical fallacy.

I’m completely agreeable and amendable to using the broader region and 1000-1200 as the definition of MWP

That is very generous to allow Lamb to say what Lamb said and not what you said Lamb said.

Perhaps it would be better to just say the MWP is 1000-1300 in that case.

It would be less accurate to false as research since Lamb’s retirement has shown that the MWP was more like 900-1150 with it’s peak around 1000.

Just because somebody came up with something first does not mean all of it stays scientifically accurate forever.

Laws of Nature
September 5, 2021 4:19 pm

Well.. I would suggest that an post discussing the recent IPCC report and especially the SPM should link to S. McIntyre´s find about the Cape Ghir series

“Precisely why local Cape Ghir (offshore Morocco) temperatures were going down is somewhat of a quandary. Rather than figuring out this quandary, Neukom and the woke just turn the series upside down, following the example of Upside Down Mann by orienting the series according to its correlation with target instrumental temperature, even in their “CPS” reconstruction – a technique that is normally resistant to opportunistic flipping of proxies to enhance HS-ness of a final reconstruction.”

Result, use strong (local) cooling as a “proof” of warming, this is a scandal and anyone intersted in climate science should be all over it! How can anybody NOT be outraged by this?

Pat from kerbob
September 5, 2021 4:42 pm

The fact I’m reading this post proves you don’t know your head from your ass

Just go away and quit wasting all our time

September 5, 2021 7:11 pm

During the period 800–1300 the Vikings settled Iceland, and Greenland,,,when the cold returned, the VIkings disappeared from Greenland.

September 5, 2021 9:32 pm

Lordy, go after someone truly evil. Try Amazon or Disney.

September 6, 2021 3:53 am

Ancient tree stumps in Siberia tell that the treeline there was also just as far north during the MWP as it is now:


September 7, 2021 1:38 pm

and he stood not in the truth; because truth is not in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father thereof.

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