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How the IPCC Buried the Medieval Warm Period - And why it keeps proving today’s warming isn’t unique or unnatural
Irrational Fear ^ | 21 Apr, 2025 | Dr. Matthew Wielicki

Posted on 04/22/2025 6:30:16 AM PDT by MtnClimber

Every year, new temperature records are breathlessly announced as though the planet is plunging into uncharted climate chaos. Mainstream headlines proclaim things like "Humanity just lived through the hottest 12 months in at least 125,000 years" or "This year virtually certain' to be warmest in 125,000 years, EU scientists say". We’re told, often without context or qualification, that the warming we’re experiencing is unlike anything seen in hundreds of thousands, or even millions, of years.

But is that really true? Or have climate authorities, especially the Intergovernmental Panel on Climate Change (IPCC), built their entire narrative on the selective memory of Earth’s climate past?

The most insidious and fraudulent aspect of modern climate science isn't flawed models or uncertain predictions... it's the deliberate erasure of past climatic states that undermine the prevailing narrative. The IPCC, ostensibly tasked with objective scientific assessment, has become a vehicle for confirmation bias, selectively omitting historical climate extremes to support alarmist conclusions. I've extensively documented this inherent bias, highlighting how it shapes and distorts their findings (Confirmation Bias within the IPCC).

Ignoring the Evidence: The IPCC’s Selective History

One such selective amnesia case is the historical megadroughts. These natural extremes far exceed modern droughts attributed to human-caused climate change, yet the IPCC habitually overlooks such critical historical data. A striking example is the Cantona megadrought in ancient Mexico, a devastating natural event entirely unconnected to anthropogenic factors. This severe drought, spanning centuries, dwarfs recent climate events but remains conspicuously absent from IPCC assessments (Forgotten Extremes: The Megadroughts the IPCC Ignores).

Similarly, the Medieval Warm Period (MWP)—a globally recognized warm epoch from roughly 950 to 1250 AD—poses an existential threat to the IPCC-endorsed narrative that modern warming is unprecedented. Initially documented extensively, the MWP was systematically erased from mainstream climate records following the infamous hockey stick graph popularized by Michael Mann in 1999. This graph significantly flattened historical temperature variability to emphasize recent warming, providing political ammunition for urgent climate action despite contradictory historical evidence (The Medieval Warm Period: A Global Phenomenon?).

This erasure isn't accidental. The IPCC's Sixth Assessment Report (AR6) minimizes the MWP, often describing it as a regional or modest climate fluctuation... not a globally significant phase. This vague framing allows them to avoid confronting the wide body of peer-reviewed evidence showing synchronized warming across both hemispheres, a conclusion that undermines the entire premise of modern warming being "unprecedented."

New Antarctic Evidence Shatters the Narrative

And now... new research from Antarctica just changed the game.

A recent study published in Nature has provided stunning new evidence that the Medieval Warm Period was not only real, but warmer than today... even in East Antarctica. The authors describe a warming pulse that occurred roughly 1,050 years ago, powerful enough to erode glaciers and carve channels deep into bedrock. These erosional signatures match what we’d expect from modern meltwater activity during periods of strong polar amplification. Only there’s a problem: this happened when CO₂ levels were stable around 280 ppm.

Even more damning is this line from the authors themselves:

"It is also noteworthy that under current climatic conditions, despite some of the effects of recent climate change that have been observed even in continental Antarctica, there is no evidence of meltwater on the BCG, and the surface of the glacier is permanently snow-covered."

Let that sink in. The glacier is not melting today... but it did melt over a thousand years ago.


TOPICS: Business/Economy; Science; Society
KEYWORDS: climatechange; ecoterrorism; ecoterrorists; globalwarming; globalwarminghoax; godsgravesglyphs; greennewdeal; medievalwarming; middleages; mwp

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1 posted on 04/22/2025 6:30:16 AM PDT by MtnClimber
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To: MtnClimber

The democRATs don’t care. The climate change movement was never about the climate. It was always an excuse to impose rationing, one of the key elements of communism.


2 posted on 04/22/2025 6:33:58 AM PDT by MtnClimber (For photos of scenery, wildlife and climbing, click on my screen name for my FR home page.)
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To: MtnClimber
Thanks for posting.

One of my favorite graphs shows the warming and cooling periods of the last few thousand years.


3 posted on 04/22/2025 6:34:41 AM PDT by Tell It Right (1 Thessalonians 5:21 -- Put everything to the test, hold fast to that which is true.)
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To: MtnClimber
Indeed.

This is another aspect which should be pursued by DOJ:

Scientific fraud to both elicit research $$ and rob the treasury.

RICO case could be made easily...if there were some cajones.


4 posted on 04/22/2025 6:34:46 AM PDT by logi_cal869 (-cynicus the "concern troll" a/o 10/03/2018 /!i!! &@$%&*(@ -)
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To: MtnClimber

Wonder why they named that piece of land “Greenland”?
Because it was GREEN. The Vikings built houses and farmed during their visits.
Weather is cyclical, it changes.


5 posted on 04/22/2025 6:34:51 AM PDT by 9422WMR
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To: MtnClimber

There was an ice age that ended about 11,000 years ago. There were warm periods and cold periods. These cycles continue today and will not end any time soon.

It’s foolish to think that the natural cycles stopped as soon as humans started to burn coal and oil, and that man’s use of fossil fuels is the driving force behind climate change.


6 posted on 04/22/2025 6:38:49 AM PDT by I want the USA back (America is once again GREAT!)
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To: MtnClimber

What’s the BCG? Baja California Glacier? Bossier City Glacier?


7 posted on 04/22/2025 6:40:58 AM PDT by Verginius Rufus
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To: Verginius Rufus

Boulder Clay Glacier (BCG) - in Antarctica’s Victoria Land


8 posted on 04/22/2025 6:44:38 AM PDT by MtnClimber (For photos of scenery, wildlife and climbing, click on my screen name for my FR home page.)
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To: MtnClimber

Thanks. Antarctica makes better sense than Baja California or Louisiana.


9 posted on 04/22/2025 6:51:51 AM PDT by Verginius Rufus
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To: MtnClimber
What they fail to mention is that 125K ago, BEFORE the last Ice Age Co2 and temperatures were higher that they have ever been during our current interglacial. And that the "normal" for Earth is COLD by 80% of it's lifetime.


10 posted on 04/22/2025 6:52:15 AM PDT by Openurmind
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To: MtnClimber
They also buried the depth of the Little Ice Age. I had to go through the accounts of Spanish explorers myself to extract indications of climate along the Pacific Coast during that time, the marine influence there being a superior indicator of change. I sent the quotes to Anthony Watts, but I don't know what else to do with them.

These quotes and extracts are listed as follows on p19 of the Wildergarten Site History:

Cabeza de Vaca survived eating shellfish in Florida in June 1528, a month in which (today) a red tide in the Gulf of Mexico would have rendered shellfish poisonous. Yet there is no record of his group suffering from neurological shellfish toxicity.

In December 1602, Sebastian Vizcaino’s voyage landed at Monterey noting snow on the hills above and ice in a pond frozen ‘a hand palm thick’ only a few hundred yards from the Pacific Ocean (although Vizcaino’s reports were of marginal reliability).

Juan Crespí, the highly reliable diarist of the Portolá Expedition, 24 September, 1769 in Jolon, San Antonio Valley, 25 miles northwest of Paso Robles, elevation 800 feet, behind two ridges of coastal mountains inland from Santa Barbara:

It is a very cold spot, with snow and heavy frosts [in September?]. Through the heathens belonging to this spot, we understand that in some years the snow falls a quarter, a half, or three quarters of a yard deep.

From the Diary of Gaspar de Portolá amid the Santa Lucia Mountains:

Dec. 19 …we travelled for three hours, passing the most difficult part of the range on which there was not a little snow [snip]

The 17th [January] we proceeded for about five hours, making [the same distance as] two marches on the previous journey, and came out on the Llano de la Puente, opposite the great sierra of snow-covered [San Gabriel] mountains…

From the 1769 account of the Portolá Expedition Engineer, Miguel Costansó:

Thursday, December 7 …in view of the few provisions that remained, the excessive cold, and, above all, the snow that beginning to cover the mountain range - our commander himself resolved upon the return believing that if the passage over the mountains became impossible we should all perish.

They were planning to cross mountains in coastal Southern California. Why were they afraid of snow? The Diary notes that the packet San Carlos had supplied the expedition. From the ship’s log of Vicente Vila the prior spring, April 26 to May 1, 1769:

At sunrise, I was between four islands [in the Santa Barbara Channel] and the mainland the country high and mountainous with several high ridges extending northwest to southeast, all of them covered with snow, like the Sierras Nevadas [Snowy Mountains] of Granada on the coast between Motril and Salobreña near the Mediterranean. Following the notes of the sea pilot, Cabrera Bueno, I decided that they might be the ridges which the Philippine sailors call Sierras de Santa Lucia above Cape Conceptión [those along the channel are the Santa Ynez Mountains].

[snip]… Turning toward the mainland, I noted the extremity of it visible furthest to the westward, bearing WNW. The shore turned toward the southeast, high and broken by several high, snow-covered ridges [probably the Santa Ana Mountains; the entry also notes San Clemente Island]. The country inland, as I have said above, runs southeast.

These “snow covered ridges” (1,200–2,500 feet in elevation) extended all the way to San Diego Bay as visible from the ocean (deep water sailors were not fond of hugging the coast) at the end of April… in Southern California? It takes a lot of snow to cover ridges above Southern California beaches for over a week, where sea breezes should have kept temperatures warm, or rain should have melted it immediately. Yet this was mid-spring. Things were colder in California during the Little Ice Age
I have since inferred that the northern limits of the range of redwood trees could be used as a proxy for similar conclusions, redwood being intolerant of hard freezing. Yet a redwood grove along Puget Sound has grown just fine there for forty years. I'm betting there are still buried redwood logs along the Oregon coast from which we could get that data, yet the dendrochronologists I've contacted showed no interest.
11 posted on 04/22/2025 6:56:36 AM PDT by Carry_Okie (The tree of liberty needs a rope.)
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To: MtnClimber

when the press spreads such dangerous lies, they should be sued for consumer fraud, since they sell news & information behind statements that begin “it is true that” this was the warmest 12 month period in 120,000 years, but it is NOT true.
consumer fraud. they are selling a dangerous product just like cigarettes or cars that explode on impact.


12 posted on 04/22/2025 7:07:26 AM PDT by Beowulf9
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To: MtnClimber

How about the warm period eons ago that allowed plants (later turned into coal) and prehistoric creatures (later found in glaciers) to thrive near the Arctic circle?


13 posted on 04/22/2025 7:10:09 AM PDT by Socon-Econ (adi)
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To: MtnClimber

Ping


14 posted on 04/22/2025 7:12:54 AM PDT by SomeCallMeTim
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To: MtnClimber

To believe that current temperature trends (to the extent that they are accurate) are unnatural, or even unusual, you have to have worked REALLY HARD to be uneducated.

The history of “average global temperatures” is a history of wild fluctuations, tropical heat at the poles, miles of ice crushing now temperate lands, 400 feet of ocean rises, impact craters - and so on.

It’s really time to ring down the curtain on “climate change” as anything out of the ordinary.


15 posted on 04/22/2025 7:15:56 AM PDT by Jim Noble (Assez de mensonges et de phrases)
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To: Jim Noble
I know.

But the issue is never the issue. The issue is always the revolution. And that is not going away quietly.

16 posted on 04/22/2025 7:21:10 AM PDT by MtnClimber (For photos of scenery, wildlife and climbing, click on my screen name for my FR home page.)
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To: MtnClimber

I’m reading an excellent book, “The Assyrians,” which, among other things, documents the vast changes to the area of the Assyrian empire due to climate change in the 9th Century BC.


17 posted on 04/22/2025 7:28:29 AM PDT by Skooz (Gabba Gabba accept you we accept you one of us Gabba Gabba we accept you we accept you one of us )
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To: MtnClimber

The IPCC is as corrupt as the Human Rights panel. A few years back the IPCC chair bragged publicly that the chaos over global warming was the perfect path to implement communist policies across the world.

That has been the sole goal since the beginning of this pack of lies. Well, OK, money laundering was a secondary goal; but, only ‘cause it was the way to install politcos and bribe those in power.


18 posted on 04/22/2025 7:37:57 AM PDT by bobbo666
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To: MtnClimber

BTTT


19 posted on 04/22/2025 7:46:15 AM PDT by nopardons
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To: Carry_Okie

Excellent post!

Wonderful idea to find buried redwood logs for dendrochronology.

Wood keeps quite well in fresh water, I have been told.

I was once on a sailboat at the head of the Portland Canal, the southern boundary of Alaska/Canada. The sailboat had sonar. It was obvious the bottom was a jumble of waterlogged trees/tree-trunks. It seemed there was enough fresh water to keep them from being consumed by shipworms, or, perhaps, it was too cold, or a combination of both. Well over a hundred feet down to the tangle.


20 posted on 04/22/2025 8:08:37 AM PDT by marktwain
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