Un hobby&#8230;

We Need to Talk About Climate (To Each Other)

17 octobre 2025 Alain Préat

by N. Komar, Oct 1, 2025 in WUWT

Among professionals who work on the climate issue (the “Climate Community”), there is a long-standing reluctance to engage in conversation with people who don’t consider that the climate is in crisis.

Due to this reluctance, there are exceedingly few recorded debates between members of the Community and those from the outside with an appropriate level of expertise to make for a lively and educational dialogue (but there are some, and below, I’ve listed all of the debates that I have been able to find).

I find the lack of debate to be frustrating. In my case, I am skeptical of the idea that the earth’s climate is in crisis. To me, the skeptical arguments seem to be more likely to be correct than the alarmist arguments. Two important reasons for my skepticism: 1) The few actual debates I have had the pleasure to witness have been won by the skeptic(s). 2) The skeptics I speak to appear confident in their views and are eager to debate people from the Community; members of the Community, conversely, display what seems like a tribal attitude and either are hesitant, or in many cases, just unwilling to debate.

I am willing to be proven wrong regarding my skepticism. But I can’t be bullied into changing my view. It would take a reasoned argument, juxtaposed against arguments from the skeptic side of the debate. And I’ve been following this issue for over 25 years. For the average person curious about climate, but new to the issue, I would guess that it is quite hard to find arguments on both sides in order to make an informed decision for themselves. While the question of how climate works is a question of Science, the culture that has developed around the issue is a culture of Politics. Consequently, a search on the internet for articles on climate will return a politically curated batch.

I’ve been working on a project for the last 2-½ years to transform the situation described above. It’s called Climate Verso. Currently the project consists of a podcast, with only a few episodes published to date. It can be found on any podcast platform: https://theclimateversopodcast.buzzsprout.com/

More episodes will be dropping over the next few months, and I’m totally open to help from anyone interested in getting involved. The format of the podcast is a dialogue between two climate professionals with differing perspectives. I am the moderator of the discussions. Please listen to either or both of the episodes published so far. The first is Matthew Wielicki and Peter Fiekowsky debating the efficacy and risks of Ocean Fertilization. The 2nd is a wide ranging conversation between Judith Curry and Andrew Revkin about how the climate issue became polarized over the last 40 years.

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New ‘Climate at a Glance’ Book Challenges ‘Climate Crisis’ Narrative with Hard Data

by A. Watts, Oct 08, 2025 in WUWT

Second edition of Climate at a Glance, published by The Heartland Institute, provides public with Facts on 40 Climate Topics

First edition in 2022 was a #1 Amazon Best-seller in the categories of ‘Science for Kids, ‘Climatology,’ and ‘Environmental Science’

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“For too long, climate discourse has been dominated by slogans and fear, while real science and sound policy have taken a back seat, but the data tell a far more complicated story. This book is not about denying that the climate changes—it always has and always will—but about questioning whether today’s costly, disruptive policies are grounded in evidence or in politics. By examining the data, the models, and the history of our ever-changing climate, this book cuts through the noise to show that climate change is not a one-way catastrophe but part of Earth’s natural variability. Instead of rushing into policies that wreck economies and livelihoods, we need honest science, open debate, and the courage to question a narrative that too often puts politics before facts.”

Anthony Watts
Senior Fellow for Environment and Climate
The Heartland Institute

climate-debate

COP30’s Carbon Circus: Elites Show Everything That’s Wrong With Climate Alarmism

by D. Blackmon, Oct 0, 2025 in ClimateChangeDispatch

Sky-high costs, private jets, and rainforest destruction make a mockery of the very climate agenda activists claim to champion.

In case you’ve missed it amid the Trump White House’s decision to ban U.S. participation, this year’s U.N.-sponsored COP30 conference is being hosted by Belem, the capital city of the Brazilian state of Pará. [emphasis, links added]

Suffice it to say that, as is always the case with these annual gatherings of globalist elites, preparations for this year’s event have been filled with a series of pitfalls, emergencies, and the usual stories of rank hypocrisy.

A great example came on Tuesday, when Bloomberg ran a story with the alarming headline, “Nations Rethink Plans for Brazil Climate Summit as Costs Soar.” Sounds scary, doesn’t it? Yeah, that’s probably the point.

It turns out that prices for hotel rooms and other accommodations are soaring (unexpectedly!) in advance of the conference, which should actually surprise no one, given that these events are regularly attended by tens of thousands of conferees armed with virtually unlimited expense accounts.

The profit motive remains alive and well in the midst of the Amazon jungle despite the best efforts of Brazil’s socialist government to kill it off. Go figure.

Bloomberg’s writers first imply that the high costs of attendance are falling mainly on the shoulders of developing nations, saying, “representatives of developing and at-risk countries say they’re considering scaling back their presence at this year’s event, which would reduce their visibility and negotiating power.”

Countries must have a big delegation present to ensure they get their entitled slices of every one of the myriad climate alarm initiatives, schemes, and scams that will be rolled out at this year’s conference, you know.

The piece singles out Tanzania’s Richard Muyungi, who chairs the African Group of Negotiators, as claiming that “African national delegations typically range from about 60 to 100 people.”

After all, it’s a two-week event, so countries feel the need to sub in backups for exhausted participants like an NFL defensive coordinator rotates tackles and linebackers.

Later in the story, though, Bloomberg admits that some developed countries are also scaling back their planned delegations from previous years.

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Sea Level Rise Hoax Exposed: The Disappearing Islands That Refuse To Disappear

by P. Gosselin, Oct 4, 2025 in NoTricksZone

Germany’s Klimanachrichten here publishes an article titled “The Disappearing Islands (That Don’t Want to Disappear)” summarizes findings suggesting that the widespread assumption about low-lying islands inevitably sinking due to rising sea levels is too simplistic and detached from reality.

Earlier, the media often tried to scoff at and discredit findings from inconvenient sea level experts, like Axel Mörner:

Undeniable science: Mörner et all, 2011

But today, climate alarmist media are forced to concede things are not as dire as they once believed.

74 of 101 islands are growing

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climate-debate

The Guardian Is Wrong: Cities Are Hotter Because of the UHI Effect, Not Increased CO₂

by A. Watts, Oct 6, 2025 in WUWT

In The Guardian’s op-ed, “World’s major cities hit by 25% leap in extremely hot days since the 1990s,”asserts that global warming has caused a sharp rise in the number of extremely hot days in cities worldwide, citing an International Institute for Environment and Development analysis that claims urban residents from London to Tokyo now experience 25 percent more hot days each year than they did in the 1990s. The claims are highly misleading if not outright false. While cities worldwide have in fact gotten warmer, carbon dioxide increases from the burning fossil fuels are not to blame, rather data strongly suggests that the significant rise in measured temperatures in and around major cities is Urban Heat Island (UHI) effect in response to population growth and development.

The article quotes scientists as saying, “Global heating caused by fossil fuel burning is making every heatwave more intense and more likely. Extreme heat is likely to have caused the early death of millions of people over the past three decades, with elderly and poor people in fast-growing cities most deeply affected.”

One telling moment comes in The Guardian article itself, where researchers concede that “failing to adapt will condemn millions of city dwellers to increasingly uncomfortable and even dangerous conditions because of the urban heat island effect.” Precisely. It is the UHI effect, not CO₂, that drives the city heat trends.

The Guardian’s narrative collapses under scrutiny, because it ignores the UHI effect. Cities are not thermometers for the planet. They are microclimates dominated by concrete, asphalt, and glass which trap heat and bias local temperature readings upward. Peer-reviewed research by John Christy, Ph.D. and Roy Spencer, Ph.D., published in the Journal of Applied Meteorology and Climatology shows that urbanization is a major driver of observed warming at city weather stations. Their research found that UHI contributed to 22 percent of the raw observed warming trend on average, and up to 65 percent at suburban and urban stations. When examining rural stations, the effect nearly vanishes. This demonstrates that much of the increase in urban temperatures is the UHI, not global climate change. This is vividly illustrated in Figures 1 and 2 below.

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Mid-Holocene South China Sea Level 2-3 Meters Higher Than Today Due To 1-2°C Warmer Temps

by K. Richard, Sep 30, 2025 in NoTricksZone

The mechanisms driving the meters-higher sea levels a few thousand years ago do not support claims that CO2 is a driver.

A comprehensive analysis (Zhang et al., 2025) of the South China Sea region indicates warmer sea water was fundamentally responsible for sea levels that were, on average, 2-3 meters higher (and in some regions as much as 5-7 meters higher) than today from approximately 7000 to 4000 years ago.

“Understanding Holocene high sea levels in the South China Sea (SCS) is critical for understanding climate change and assessing future sea-level rise risks. We provide a comprehensive review of the Holocene highstand in the SCS, focusing on its age, height, and mechanisms. Records reveal a wide range for this highstand: ages span 3480–7500 cal yr BP, while elevations range from −7.40 to 7.53 m relative to the present. Positive elevations dominate (80.5% of records), with the most frequent range being 2–3 m.”

“…the Holocene high sea level in this region occurred between 7200 and 5000 yr BP…at least 2.9-3.8 m higher than today.”

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climate-debate

New Study Attributes Arctic Sea Ice Decline – And ‘Slowdown’ Since 2012 -To Internal Variability

by K. Richard, Oct 2, 2025 in NoTricksZone

“Observations show no significant decline in Arctic sea ice concentration (SIC) since 2012…revealing a negligible trend of -0.4% per decade…” – Wang et al., 2025

Scientists are now acknowledging the sharply declining trend in Arctic sea ice from the mid-1990s to 2010s (-11.3% per decade), as well as the “negligible” or flat trend since 2012 (-0.4% per decade) are both “closely coupled” with natural decadal-scale variations in the North Atlantic Oscillation, the Atlantic Multidecadal Oscilliation, and “enhanced summertime radiation balance associated with an anticyclonic atmospheric circulation pattern.”

In other words, instead of a linear decline in Arctic sea ice coupled with rising greenhouse gas emissions, it is claimed that “approximately half” of the observed Arctic sea ice decline in the modern era can be attributed to internal variability.

The authors of this new study published in Nature Communications further suggest the flattened trend or “slowdown” in sea ice decline will likely persist for the next 10 to 15 years. Consequently, alarmist predictions of an “ice-free” Arctic in the coming decades will have to be put on hold until after the 2030s.

energy and fields

Place Your Bet on the Future of Energy: U.S. Or China

by F. Menton, Oct 1, 2025 in WUWT

The first eight months of the second Trump administration have seen a sea change in energy policy. Previously, under Biden, the federal government had undertaken a blowout of hundreds of billions of dollars of subsidies and incentives for so-called “renewable” energy sources, while simultaneously implementing dozens of regulations and restrictions to suppress the production and use of fossil fuels. President Trump has now reversed all of that.

However, please take note of an important distinction: although Trump and Congress have zeroed out nearly all subsidies and tax credits for wind and solar generation and for grid-scale batteries, they have not enacted comparable subsidies and incentives for fossil fuels. Instead, all sources of energy production now must stand or fall without subsidies, based on their ability to fulfill customer demand and to generate profit. All sources of energy are now on equal footing, and without subsidies.

Meanwhile, over in China, billions of dollars in subsidies have flowed for many years into developing the ability to produce the infrastructure for a wind/solar/storage energy system — things like polysilicon, solar panels, solar cells, wind turbine blades, wind turbine nacelles, and battery cells. As a result, China has become completely dominant in the world in manufacturing these and many related items.

So who is making the better energy bet?

For one possible answer to that question, here is a Wall Street Journal piece from September 21(probably behind pay wall). You get a clear idea where they are going from the headline, “The U.S. Is Forfeiting the Clean-Energy Race to China.”

In the vision of the authors of the piece (David Uberti, Ed Ballard, and Brian Spengele), there is an international race under way for dominance in “clean energy,” and the United States is in the process of losing it. The problem is that the U.S. is failing to put up the necessary government subsidies for “clean energy” to vie for the lead. Excerpt:

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The Amazon’s “CO₂ Problem”? Turns Out the Trees Love It – So Does the Media

This year, European nations announced plans to pursue artificial intelligence. National leaders announced AI spending goals totaling hundreds of billions of euros in efforts to catch up to the United States. But AI requires huge amounts of electrical power, conflicting with Europe’s commitment to achieve a Net Zero power grid.

by A. Watts, Oct 1, 2025 in WUWT

For decades, we’ve been warned that the Amazon rainforest—the so-called “lungs of the planet”—was on the verge of collapse. Headlines screamed about tipping points, mass die-offs of giant trees, and irreversible climate catastrophe. Yet, buried in the data, something rather inconvenient has been happening: the Amazon is getting bigger, fatter, and taller.

A new Nature Plants study, covering 30 years of field data from 188 permanent forest plots across Amazonia, shows that the average size of Amazon trees has increased by more than 3% per decade . In plain English: the forest isn’t shrinking in stature, it’s bulking up.

The researchers found:

Mean tree size up 3.3% per decade
Largest trees (>40 cm diameter) increased 6.6% per decade
Biomass increasingly concentrated in the biggest trees
No evidence of large-scale die-off from climate stress

In their words:

“We find that tree size has been increasing across all size classes… The observed patterns match the expectations from increased resource availability, particularly from rising atmospheric CO₂.”

So much for the “large trees are doomed” hypothesis.

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My Final Thoughts

The real takeaway is this:

Rising CO₂ is not just a “pollutant”—it is also a powerful plant fertilizer.
Amazonian forests are currently benefitting, not suffering, from this change.
Predictions of imminent collapse have once again run headlong into inconvenient data.

When climate modelers assure us that “the science is settled,” it’s worth recalling just how often field data overturns the narrative. The Amazon was supposed to be collapsing. Instead, its trees are thriving.

That doesn’t sell headlines or funding proposals, but it’s what the evidence shows.

So, next time someone calls CO₂ “pollution,” remind them: without it, plants—and by extension, we—wouldn’t exist. And with a bit more of it, the world’s largest rainforest seems to be doing just fine.

only geology

Two of Greece’s most dangerous volcanoes share an underground link

29 septembre 2025 Alain Préat

by C. Graling, Sept 24, 2025 in ScienceNews

A January earthquake swarm exposed shared plumbing between Santorini and Kolumbo.

An intense swarm of earthquakes around Greece’s Santorini Island in January has revealed a fiery underground link between two neighboring and historically explosive volcanoes.

Analyses of seismic activity from June 2024 through February 2025, along with changes in the island’s surface elevation, suggest that the same well of magma feeding the Santorini volcano may also supply the submerged Kolumbo volcano, just seven kilometers away, researchers report September 24 in Nature.

Complex, shared magma plumbing systems can complicate the interpretation of earthquakes and signs of imminent eruptions, say Marius Isken, a geophysicist at the GFZ Helmholtz Centre for Geosciences in Potsdam, Germany, and colleagues. This study, they say, highlights the need for real-time, high-resolution monitoring to improve volcano warnings.

Santorini is known for a catastrophic volcanic eruption around 1560 B.C. that contributed to the end of the Minoan civilization and caused widespread devastation, including earthquakes, tsunamis and possibly a volcanic winter. Kolumbo is no slouch either, erupting most recently in A.D. 1650.

When a swarm of over 1,200 earthquakes rattled the region early this year, Greece declared a state of emergency, fearing an imminent eruption. Although no eruption ensued, the abundant quakes allowed Isken and colleagues to examine the subsurface and better understand how and where magma moved.

climate-debate

New Study: Modern Warmth Is Merely Part Of A Natural Cycle

24 septembre 2025 Alain Préat

by K. Richard, Sep 22, 2025 in NoTricksZone

Throughout the last 10,000 years there have globally been much warmer and more extensive iceless periods than observed in the modern era.

“There is reliable geological evidence that the temperature of most warming phases in the Holocene were globally higher or similar to that of the current warming period, Arctic sea ice was less extensive, and most mountain glaciers in the northern hemisphere either disappeared or were smaller.”

Cold periods – like warm periods – are driven by natural solar forcing mechanisms. The last of which was manifested in the 19th century.

“A solar forcing mechanism has steered Holocene climate change, expressed by 9 cooling phases known as Bond events.”

The recent warming is part of a natural cycle, not a consequence of human activity.

“The modern warming is part of a climatic cycle with a progressive warming after the Little Ice Age, the last cold episode of which occurred at the beginning of the 19th century.”

There is thus nothing unprecedented or even unusual about the modern climate state. Any claims to the contrary are “not supported by the geological data.”

Ses Marks, 2025

climate-debate

“But you said the ice was going to disappear in 10 years!”

23 septembre 2025 Alain Préat

by Gavin, Sep é&, 2025 in RealClimate

Almost two decades ago, some scientists predicted that Arctic summer sea ice would ‘soon’ disappear. These predictions were mentioned by Al Gore and got a lot of press. However, they did not gain wide acceptance in the scientific community, and were swiftly disproven. Unsurprisingly, this still comes up a lot. Time for a deeper dive into what happened and why…

It is unsurprising that climate contrarians bring up past ‘failed predictions’ to bolster their case that nothing need be done about climate change. [It is equally unsurprising that they don’t bother to mention the predictions that were skillful, but let’s not dwell on that!]. For a long time, their favorite supposed ‘failed prediction’ was that there was a consensus about the imminence of a new ice age in the 1970s (a topic we have covered many times), but more recently it has turned to the supposed prediction of Al Gore that “Arctic summer sea ice would disappear” in a short number of years. This has everything – the ‘But Al Gore!’ knee-jerk, a conflation of Al Gore with the scientific community, it’s sounds suitably apocalyptic and, of course, Arctic summer sea ice has not disappeared (it’s only down 40% or so):

*Arctic summer sea ice extent anomalies from NSIDC, with the exceptional years of 2007 and 2012 highlighted (data through July 2025).*

What did Al Gore actually say?

If we go back to Dec 2007, in the immediate aftermath of the shocking decrease in sea ice that summer, Gore gave his acceptance speech for the Nobel Peace Prize he’d received jointly with the IPCC. In it he said:

Last September 21, as the Northern Hemisphere tilted away from the sun, scientists reported with unprecedented distress that the North Polar ice cap is “falling off a cliff.” One study estimated that it could be completely gone during summer in less than 22 years. Another new study, to be presented by U.S. Navy researchers later this week, warns it could happen in as little as 7 years.

What was he reporting on?

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only geology

Earthquakes release blistering heat that can melt rock in an instant

21 septembre 2025 Alain Préat

by Massachusetts Institute of Technology, Sep 19 in ScienceDaily

Based on mini “lab-quakes” in a controlled setting, MIT findings could help researchers assess the vulnerability of quake-prone regions.

MIT scientists have unraveled the hidden energy balance of earthquakes by recreating them in the lab. Their findings show that while only a sliver of energy goes into the shaking we feel on the surface, the overwhelming majority is released as heat—sometimes hot enough to melt surrounding rock in an instant

Earthquakes Release Blistering Heat — A scanning electron photomicrograph highlights a region of rock that slipped during a laboratory-induced earthquake. The “flowy” central area represents a portion of the rock that was melted and turned into glass due to intense frictional heating. Credit: Matěj Peč, Daniel Ortega-Arroyo

The ground-shaking that an earthquake generates is only a fraction of the total energy that a quake releases. A quake can also generate a flash of heat, along with a domino-like fracturing of underground rocks. But exactly how much energy goes into each of these three processes is exceedingly difficult, if not impossible, to measure in the field.

Now MIT geologists have traced the energy that is released by “lab quakes” — miniature analogs of natural earthquakes that are carefully triggered in a controlled laboratory setting. For the first time, they have quantified the complete energy budget of such quakes, in terms of the fraction of energy that goes into heat, shaking, and fracturing.

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better to know...?, energy and fields

Europe: AI Development or Net Zero?

21 septembre 2025 Alain Préat

by S. Goreham, Sep 18, 2025 in CornwallAlliance

Since ChatGPT released their AI chatbot in November of 2022, artificial intelligence has exploded. In only two years, the AI revolution became the driving force in the US high-tech industry. Amazon, Google, Meta, Microsoft, and other firms will spend over $100 billion this year building and upgrading data centers to run AI. Nvidia, the dominant supplier of AI graphics processor units (GPUs), became the most valuable company in the world, its market capitalization soaring from $300 billion to $4.3 trillion in less than three years.

Artificial intelligence requires vast amounts of electricity. AI processors run 24 hours a day, enabling computers to think like humans. When servers are upgraded to support AI, they consume 6 to 10 times more power than when used for cloud storage and the internet. Data centers consumed 4% of US power at the start of 2024 but are projected to consume 20% within the next decade.

The need for new generating capacity for AI now drives US electricity markets. Coal-fired power plant closures have been postponed in Georgia, Indiana, Illinois, Tennessee, Utah, West Virginia, and other states. Nuclear plants are restarting in Iowa, Michigan, and Pennsylvania. Dozens of small modular reactors are on the drawing board. More than 200 gas-fired plants are in planning or under construction, including more than 100 in Texas. Companies building AI data centers are constructing their own on-site power plants, unwilling to wait for grid power. The pursuit of artificial intelligence is rapidly replacing obsolete US Net Zero policies.

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