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You are here: Home / Climate Science / Climate modelling / Unforced variations: Jan 2026

Unforced variations: Jan 2026

1 Jan 2026 by group

This month’s open thread. We’re not great ones for New Year’s resolutions, but let’s try. How about we resolve to stay substantive, refrain from abusing one another, and maintaining a generosity of spirit when interacting with others?

Lots of things get updated in January and we’ll try and keep up, though possibly with less fanfare than in previous years. In other news, we await the (supposedly imminent) release of a new “National Climate Assessment”, and the (supposedly imminent) engagement of the authors of the DOE ‘climate report’ with the extensive critiques they received. Meanwhile CMIP7 has started, and we expect results to trickle into the databases throughout the year – dig into some of the literature to get a sense of what will change (better models, improved forcings, etc.).

Eppure si riscaldi.

Filed Under: Climate modelling, Climate Science, Instrumental Record, Open thread, Solutions

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316 Responses to "Unforced variations: Jan 2026"

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  1. Data says

    28 Jan 2026 at 12:35 AM

    Contrary to RC ‘biased moderates’ [the non-climate science proponents of various arguments against the increasing risk of GAGW ‘catastrophic anthropogenic global warming’ today], while minimizing and denying accelerating warming rates driving future catastrophic risks and mislabelling others presenting credible information as “wrong or extreme doomers”, the fact is CAGW ‘catastrophic anthropogenic global warming’ is already upon us now.

    “[…] CAGW is simply a straw man used by climate contrarians to criticize the mainstream position.”
    https://www.realclimate.org/index.php/archives/2026/01/a-peek-behind-the-curtain/#comment-844414
    https://www.realclimate.org/index.php/archives/2026/01/a-peek-behind-the-curtain/#comment-844428
    and
    https://www.realclimate.org/index.php/archives/2026/01/a-peek-behind-the-curtain/#comment-844368
    https://www.realclimate.org/index.php/archives/2026/01/a-peek-behind-the-curtain/#comment-844437
    iow another “Don’t believe your own eyes” moment.
    ===

    Example: Atomsk’s Sanakan repeatedly denies and undermines the following kinds of climate science findings as being misunderstood, due to people not reading his own references or commentary, as extreme unfounded opinions, not believable, nor supported by climate science… when in fact these are broad based well known consensus climate science findings.

    The following simultaneously supports the findings of IGCC Forster et al 2024-2025, Foster-Rahmstorf 2025, Hansen et al 2024-2025 incl prior papers, along with many other climate science papers in particular the established rapid acceleration in warming since 2010; while undermining almost everything pushed by Atomsk’s Sanakan these last months and years.

    We are hurtling toward climate chaos. The planet’s vital signs are
    flashing red. The consequences of human-driven alterations of
    the climate are no longer future threats but are here now. This
    unfolding emergency stems from failed foresight, political inac-
    tion, unsustainable economic systems, and misinformation. Al-
    most every corner of the biosphere is reeling from intensifying
    heat, storms, floods, droughts, or fires. The window to prevent the
    worst outcomes is rapidly closing.

    In this report, we seek to speak candidly to fellow scientists,
    policymakers, and humanity at large. Given our roles in research
    and higher education, we share an ethical responsibility to sound
    the alarm about escalating global risks and to take collective ac-
    tion in confronting them with clarity and resolve. We show evi-
    dence of accelerated warming and document changes in Earth’s
    vital signs.

    The last few years have seen surface temperature, ocean temper-
    ature, and sea ice extent records broken by extraordinary margins
    (supplemental figure S1). This is consistent with warming acceler-
    ating because of a large cloud feedback and decreasing emissions
    of aerosols that mask warming (Hansen et al. 2025, Tselioudis
    et al. 2025). The rapid pace of warming may also be partly because
    of a weakening land carbon sink. In 2023, land uptake of carbon
    dioxide dropped sharply from historical averages, likely driven by
    El Niño and intense forest fires (Friedlingstein et al. 2024). As a re-
    sult, atmospheric carbon dioxide concentrations rose unusually
    quickly, despite only modest increases in fossil fuel emissions.

    The year 2024 set a new mean global surface temperature record, signaling an escalation of climate upheaval.
    Currently, 22 of 34 planetary vital signs are at record levels.
    Warming may be accelerating, likely driven by reduced aerosol cooling, strong cloud feedbacks, and a darkening planet.
    The human enterprise is driving ecological overshoot. Population, livestock, meat consumption, and gross domestic product
    are all at record highs, with an additional approximately 1.3 million humans and 0.5 million ruminants added weekly.
    In 2024, fossil fuel energy consumption hit a record high, with coal, oil, and gas all at peak levels.

    As a result of surging fossil fuel consumption, energy-related
    emissions rose 1.3% in 2024, reaching an all-time high of 40.8
    gigatons (Gt) of carbon dioxide equivalent (CO 2 eq; figure 1j).

    The losses within tropical primary forest were particularly large
    in 2024, with fire-related losses reaching a record high of 3.2 Mha,
    compared with just 0.69 Mha in 2023—a 370% increase

    On the basis of year-to-date averages, atmospheric concentrations
    of carbon dioxide, methane, and nitrous oxide were all at record
    high
    levels again in 2025 (figure 2a–2c).

    An important predictor of future warming is Earth’s energy
    imbalance
    —the difference between the amount of solar energy
    absorbed and the amount radiated back into space (figure 2m). It
    is rising much more quickly than predicted by most climate mod-
    els
    , possibly because of a darker planet corresponding to a large
    decrease in Earth’s albedo, which is near an all-time low.

    Each additional [0.10C] tenth of a degree of global warming leads to
    a disproportionately greater rise in disasters related to extreme
    weather and many additional people facing intolerable heat stress
    (Lenton et al. 2023). The past year has seen a surge in devastating
    climate-related disasters around the world (table 1). From deadly
    floods and wildfires to record-breaking storms and heatwaves, the
    evidence is overwhelming:

    These prolonged and intensifying water extremes, likely
    driven primarily by rising global temperatures, underscore
    growing hydroclimatic whiplash—extreme swings between wet
    and dry conditions (Li and Rodell 2023, Rodell and Li 2023)

    Although all climate and weather extremes have multiple physical
    drivers, these disasters are part of a broader pattern of es-
    calating risk driven by a warming planet
    .

    The accelerating climate crisis presents a range of deeply in-
    terconnected risks that threaten to destabilize the Earth system
    and society.

    Recent catastrophic events include:
    September 2024
    Hurricane Helene caused catastrophic flooding and wind damage across six southeastern US states, leading to 251 deaths and US$78.7 billion in damages.
    October 2024
    catastrophic flooding, extreme rainfall, hail, and tornadoes in southeastern Spain caused over 200 deaths and billions in damages
    December 2024
    Cyclone Chido caused catastrophic damage in and near Southeast Africa, injuring 6534
    people and resulting in at least 172 deaths and more than US$681 million in damages
    March 2025
    Over 400 millimeters of rain in 8 hours caused catastrophic flooding in Bahía Blanca,
    killing 17, and resulting in US$400 million in infrastructure damage, and overwhelming homes, hospitals, and drainage systems.
    July 2025
    A catastrophic overnight flash flood in Central Texas, in the United States, killed at least 135 people, and became one of the deadliest single-night disasters in state history.

    [AMOC] collapse could also initiate cascading tipping events,
    amplifying the impacts to a catastrophic level. These impacts may
    already be occurring; for instance, between 2005 and 2022, up to
    half of the flooding events along the northeastern US coast may
    have been driven by Atlantic meridional overturning circulation
    weakening (Zhang et al. 2025).

    Conclusion: We are entering a period where only bold, coordinated
    action can prevent catastrophic outcomes.

    Who wrote this?
    William J. Ripple, Christopher Wolf , Michael E. Mann, Johan Rockström, Jillian W. Gregg, and others
    Ref: https://michaelmann.net/wp-content/uploads/2025/10/RippleEtAlBioscience2025.pdf

    The only things Atomsk’s Sanakan talks about are an impossible to meet short-term negative CI of statistical significance hypothetical that ignores all recent data trends and his non-stop minimizing of the accelerated warming scientific consensus since 2010 while making incredible unrealistic future GMST predictions not based on credible UpToDate science data. I don’t believe anything he says as a result, because it’s all dubious rhetoric based on cherry-picking and logical fallacies being distorted by a flood of nonsensical references no one could reasonably follow.

    While others waste time and space over irrelevant CDR/DAC sequestration issues which are never going to happen in any form at scale nor will it stop Net Zero Emissions by 2050 becoming an abject failure. At any future time included, short of an implacable global civilization and economic collapse that’d make COVID and the GFC look like a minor hiccups.

    As shown in this “mainstream but contrary science” it is Atomsk’s Sanakan who is misleading others by distorting and cherry picking what info he’ll use while ignoring proper science practise. Then repeatedly refusing to admit he is wrong when challenged with facts backed by Data.

    To Geoff Miell A’sS says: “This isn’t a question of policy. It’s a question of statistical significance in science.”
    https://www.realclimate.org/index.php/archives/2025/11/unforced-variations-nov-2025/#comment-842265

    No, it is not. It’s all about the observable Physics and proper scientific process.

    The big problem climate science distorters/deniers like Atomsk’s Sanakan have is:
    Statistical significance is not the same thing as real-world risk. You can’t use a p-value to dismiss the possibility of catastrophe, especially when the stakes are existential.

    And the irony is: The only people who keep insisting “it’s not significant” are the ones who want to avoid acting until the crisis is undeniable. That’s not science — it’s denial dressed up as rigor.
    https://www.realclimate.org/index.php/archives/2026/01/unforced-variations-jan-2026/#comment-844027

    Atomsk’s Sanakan’s long-term non-CAGW stance calls on people to “Trust the process, the experts, the institutions,” the outdated IPCC and CMIP outputs, the dashboards, the COP system, and Statistical certainty of 95% CI — Which works — until it doesn’t.

    afaik Atomsk’s Sanakan has been actively undermining climate science for years, yet still no climate scientist has effectively confronted his distortions, his cherry-picking, his manipulations of the general public about the risks and implications of GAGW ‘catastrophic anthropogenic global warming’.

    • Piotr says

      28 Jan 2026 at 10:19 AM

      Multi-troll “Data”: 28 Jan 2026 at 12:35 AM […]

      I see you are following Steve Bannon strategy of “owning” the opponents by “Flooding the zone with shit”
      with flooding not only in a sheer number of the said …. Data productions (102 posts in first 23 days of the year), but also with volume of the individual pieces of that flood (this one – 1433 words and 7 url links)

      Is somebody paying per word?

    • Atomsk's Sanakan says

      28 Jan 2026 at 10:38 AM

      It looks like the sockpuppet again commented on research they neither read nor understood, much like when they were caught pretending Forster 2025 was not peer-reviewed. The sockpuppet pretends that the ‘CAGW is a straw man’ point was made in response to people who think AGW is a catastrophe and define what they mean by ‘catastrophe’. The ‘CAGW is a straw man’ point was instead made in response to denialists/contrarians who abuse the term without properly defining it. That point has been made by plenty of other people and is supported by published evidence the sockpuppet will never read.

      For the curious, below is the academic book chapter on this, along with context from others. The sockpuppet account is never going to read and understand the chapter.

      – Jacobs 2016: “Another claim advanced by those who reject the mainstream scientific agreement on climate is that the consensus position consists of a claim of catastrophic anthropogenic global warming or the frequently used acronym CAGW (e.g., Hickey 2014; The Hockey Schtick 2012; Milloy 2012; Starck 2012). However, CAGW is rarely, if ever, defined or sourced to a mainstream scientific organization or study. Any scientific study’s result, or statement by a researcher, that does not fit a contrarian’s personal, flexible definition of CAGW can therefore be adopted as ostensibly supporting their view and refuting the mainstream, even when such results are actually consistent with the mainstream position on climate (e.g., The Hockey Schtick 2014) [page 41].
      […]
      Additionally, we find that catastrophic anthropogenic global warming is essentially a term that is never used in the relevant scientific literature by mainstream sources. Furthermore, in the press it appears to be used exclusively by climate contrarians. The term is typically neither defined nor attributed to a mainstream scientific source. Our conclusion is therefore that CAGW is simply a straw man used by climate contrarians to criticize the mainstream position [page 50, bolding added].”

      – Dave Farina (science communicator): 1:26:10 to 1:26:56 of this video

      – Peter Hadfield (a.k.a. Potholer54; geologist + science journalist): 13:41 to 14:26 of this video

      – Aaron Huertas (former climate policy analyst): “Similarly, many anti-climate action groups have evolved from outright climate denial to acknowledging that climate change is real and a problem but say they’re against “climate alarmism” and don’t believe in “catastrophic global warming.” […] Their actual operating definition is that “catastrophic global warming” is the precise amount needed to justify policy action, and, by definition, we will always fall short of it.“

      • Atomsk's Sanakan says

        30 Jan 2026 at 11:56 AM

        Re: “The ‘CAGW is a straw man’ point was instead made in response to denialists/contrarians who abuse the term without properly defining it.“

        An illustration of that point:

        Nigelj says: “I didnt use the word catastrophic or even infer it. I don’t like the word because its too open to interpretation and too easy for denialists to use against warmists. My view is that climate change will be very serious problem if we do nothing.“

        Terminology like ‘very serious problem’, ‘dangerous’, etc. is also used by climate scientists, and defined in terms of increased hurricane intensity, sea level rise acceleration, etc.

        – Dave Farina (science communicator) + climate scientist Dr. Andrew Dessler: 1:26:11 – 1:26:56 and 1:53:15 – 1:57:53 of this video

        – this from page 14 of Pew 2015

        – figures 88 and 2 from pages 98 and 11 Bray 2016, with this from page 49 of von Storch 2017

        The contrarian/denialist Nigelj responded to abused terms like ‘catastrophe’ and ‘alarmist’ without properly defining them, to straw man positions they ideologically opposed.

        – Aaron Huertas (former climate policy analyst): “Similarly, many anti-climate action groups have evolved from outright climate denial to acknowledging that climate change is real and a problem but say they’re against “climate alarmism” and don’t believe in “catastrophic global warming.” But what do these terms mean? Again, they never say [bolding added]. […] Their actual operating definition is that “catastrophic global warming” is the precise amount needed to justify policy action, and, by definition, we will always fall short of it.“

        This tactic is not new about science denialists. It’s akin to a creationist objecting to evolutionary biology by claiming evolution does not produce new ‘kinds’ of organisms. Yet the creationist never properly defines what they mean by ‘kind’. That allows them to peddle a straw man of evolutionary biology, and always conveniently claim something does not count as a new ‘kind’ on their unspecified meaning of the term. They do that for their religious/ideological agenda, such as a policy agenda of getting creationism taught in schools as science. Parallel point here for a political/ideological agenda on climate policy.

    • Nigelj says

      28 Jan 2026 at 2:56 PM

      Datas post @28 Jan 2026 at 12:35 AM

      Concerned scientists say: “We are hurtling toward climate chaos. The planet’s vital signs are
      flashing red….etcetera….”

      I think we are as well, and Im agreeing with Data on that, but none of that changes the fact AS is correct that there’s no statistically significant detection of an acceleration in warming since 2015, and that claiming we are certain that warming has accelerated is inaccurate, and just feeds the denialists who can easily and genuinely debunk that argument by noting its not statistically significant. We can however say its VERY LIKELY that warming has accelerated. This is subtly different but very defensible and the argument we should make. AS himself has acknowledged this and that we have good reason to mitigate the problem. I can see how AS could come across as a luke warmer, but he has clearly stated several times he isn’t a luke warmer, and its fairly obvious he isn’t if you READ CAREFULLY.

      All Data has to do to is acknowledge the truth of what AS says and answer his 5 questions affirmatively and then raise any points Data might have ( its likely theres an acceleration, big problem, etc,etc…..). This diffuses the situation and saves face and moves things along. Instead Data refuses to do this and keeps on repetitively attacking AS (with numerous strawman arguments thrown in the mix) and perpetuating the discussion ad nauseum to the point of insanity. ironically this amplifies the discussion about statistical significance, the very thing that is annoying Data.

      I’m afraid Piotr has a point that it is like flooding the space with shit. Steve Bannon would be proud of it.

      • Atomsk's Sanakan says

        28 Jan 2026 at 9:54 PM

        Re: “I can see how AS could come across as a luke warmer, but he has clearly stated several times he isn’t a luke warmer, and its fairly obvious he isn’t if you READ CAREFULLY.“

        Yup. And the link for my name goes to a video debunking lukewarmism + explaining why AGW is dangerous (with a clear definition of what ‘dangerous’ means in terms of increased hurricane intensity, sea level rise acceleration, etc.). But the sockpuppet account would rather willfully misrepresent people than answer basic questions on what the sockpuppet said.

  2. b fagan says

    28 Jan 2026 at 9:53 PM

    Briony Worthington of the Cleaning Up podcast interviews Zeke Hausfather

    The State of the Climate 2026 | Ep242: Zeke Hausfather

    https://www.youtube.com/watch?v=EzySrSD8vz8

  3. Susan Anderson says

    29 Jan 2026 at 6:20 PM

    Note: the dollar is collapsing. Thanks for the reality denial, Trump/maga.

  4. Susan Anderson says

    31 Jan 2026 at 11:53 AM

    I will repost this for February. It is a really fine explainer, and North America and Europe are warned that more dangerous weather is on the way. Stratospheric Warming (‘sudden’) and polar incursions are of particular interest to me, and their effects to all of us. This is a useful explainer, with both simple and expert analysis, and useful imagery. Stratospheric Warming Confirmed: Polar Vortex Collapse to Bring Major Weather Disruption in the Coming Weeks – https://www.severe-weather.eu/global-weather/polar-vortex-collapse-february-2026-stratospheric-warming-forecast-winter-united-states-canada-europe-fa/

    “New forecasts confirm a Polar Vortex split and collapse in mid-February, following a Stratospheric Warming event. The latest predictions show a breakdown of the polar circulation, creating a prolonged cold weather pattern across North America and Europe, with early signs that it can last into early Spring.

    “While the main collapse is scheduled for mid-month, the United States and Canada are already feeling the early effects of a pre-split disruption. A deformed, elongated Polar Vortex core is currently pushing cold anomalies into the central and eastern U.S., with temperatures in some regions forecast to drop 30°F below normal.

    “Current data indicates that this Stratospheric Warming event will start unfolding over the next 8 to 10 days. In this article, we will look at the prolonged disruption of the stratospheric Polar Vortex. Also, we will analyze the resulting weather impacts over North America and Europe for the remainder of winter and into early spring.”

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