The risk of a hothouse Earth trajectory

(cell.com)

345 points | by Archelaos 2 months ago ago

17 comments

  • smartmic 2 months ago

    It is important to keep reminding ourselves that climate change is a real problem for humanity and that each and every one of us contributes to its intensification or mitigation through our decisions. It is a problem that requires solutions, but implementing these solutions involves so much inertia that it can sometimes be painful.

    And let's contrast that with the AI hype. It's more the opposite, a kind of solution to problems we didn't really have, but are now being persuaded we do. It would be sensible to invest an equal share of the resources currently being pumped into AI with uncertain outcomes into the complex issue of climate change. And, no, AI won't solve it; unfortunately, it only makes it worse.

  • aleda145 2 months ago

    Very alarming. I feel like especially the West is regressing on climate change with the rise of the far right (https://www.politico.eu/article/robert-lambrou-alternative-f...)

    I don't know what to do.

  • Aeveus 2 months ago

    Miss the days where YC put emphasis on climate tech too:

    - https://www.ycombinator.com/blog/rfs-climatetech

    - http://carbon.ycombinator.com/

  • vaylian 2 months ago

    This is one of the key sentences:

    > Policymakers and the public, however, remain largely unaware of the risks posed by such a practically irreversible transition

    Most people still underestimate what it means for the earth system to change from the current stable state into another state, which might need many years to become stable again. And that new stable state might be a lot less favourable for us humans.

  • blueflow 2 months ago

    Its not a "risk".

    Water vapor (clouds) is a stonger greenhouse gas than carbon dioxide. We already got measurably higher temperatures, so we also have higher water evaporation, and from the last 5 years it looks like it happens every year.

    So the runaway is already happening, until something stops it near hothouse conditions or hopefully earlier than that.

  • chasil 2 months ago

    What is generally not understood is that our current icehouse phase is rare.

    'A "greenhouse Earth" is a period during which no continental glaciers exist anywhere on the planet... Earth has been in a greenhouse state for about 85% of its history.

    'Earth is now in an icehouse state, and ice sheets are present in both poles simultaneously... Earth's current icehouse state is known as the Quaternary Ice Age and began approximately 2.58 million years ago.'

    https://en.wikipedia.org/wiki/Greenhouse_and_icehouse_Earthh...

  • Animats 2 months ago

    The CO2 graph over decades is painfully clear.[1] From 321ppm in 1970 to 428ppm in mid-2005, measured in Hawaii atop Mauna Loa, far from any major CO2 sources. Everything else is noisy and statistical, but the CO2 measurement increases very steadily.

    [1] https://gml.noaa.gov/ccgg/trends/

  • kieranmaine 2 months ago

    The bull case is solar and batteries are only going to get cheaper so the speed of the transition will increase.

    * Australia's renewables generation increased from 13.7% in 2015 to 42.9% in 2025 [1]

    * EIA: 99%+ of new US capacity in 2026 will be solar, wind + storage [2]

    * Wind and solar overtake fossil power in the EU for the first time in 2025 [3]

    1. https://explore.openelectricity.org.au/energy/nem/?range=all...

    2. https://electrek.co/2026/01/28/eia-99-of-new-us-capacity-in-...

    3. https://ember-energy.org/latest-insights/european-electricit...

  • TrackerFF 2 months ago

    One massive mistake scientists made, was to market it as "global warming". Every climate-denier I've ever met, has pulled out the "If the earth is getting warmer, why are our winters still so cold? Check mate" card.

    I live in a colder climate area, and every. single. time. we get some cold weather, these people will come crawling out of the woodwork to point out that "global warming is hoax!"

    And, unfortunately, due to the extreme rise of populism the past 10 years, the "climate change is a hoax" mentality has been allowed to prosper.

  • daverol 2 months ago

    When I want to motivate myself I look at this https://www.theclimatebrink.com/p/the-scariest-climate-plot-...

  • jdmoreira 2 months ago

    Just price in the externalities and it probably solves itself

  • 2OEH8eoCRo0 2 months ago

    Carbon tax. Stop subsidizing fossil fuels.

  • baq 2 months ago

    Nothing new under the sun.

    We can't cut emissions fast enough politically, but we can race towards economically viable fusion power which would solve the problem from the supply side and would make industrial scale carbon sequestration not insane, for a century or so, until waste heat itself can't be radiated fast enough even in 250 ppm CO2 atmosphere - but that's a problem for the XXII century.

  • _kulang 2 months ago

    I think the answer to this is ultimately economic, and that people will only change their habits when it comes down to what costs them money. Naturally this is because culturally, we have defined our life in this way, and those who value money benefit from the existing culture.

    People who treat money as the only resource they need to navigate life stand to lose when things get expensive, but stand to lose even more when other forms of resource (energy, family connections, community) are needed.

    As an extension of this I think extreme wealth inequality won’t ever be solved by a more equal distribution of money, and only can be solved by a devaluing of money as compared to other resources and thus a reduction in the power that money has. It’s not surprising then that billionaires end up spending their money on what gives them more control rather than what is a sensible monetary decision, like Musk purchasing Twitter.

  • phkahler 2 months ago

    I dont understand this line of reasoning at all. The holocene looks like the most recent in a cycle of short warming periods that has been going on for over 1M years. There is little reason to think its stable. One could argue that we should push warming to prevent the coming glaciation. I rather suspect that would hasten it instead, but the runaway hot house thing is not supported by the historic record. Perhaps the collapse of the AMOC is what tips it. Either way, saying its the most whatever in 125K years is irrelevant since we should be aiming for conditions from before the ice age. If you frame it in the longer history briefly mentioned in the article it looks quite different.

  • schiffern 2 months ago

      >Despite decades of research and sophisticated computational climate modeling, the magnitude and pace of these events have surprised scientists, raising questions about how well current climate projections capture risk.
    
    "Yet again, worse than we predicted."

    When this always-revise-in-one-direction phenomenon happened with the electron charge, it was considered a priori "proof" that scientists were fudging their data to match expectations. The Millikan Oil Drop Experiment is still studied in fundamentals of science class.[0]

    If climate scientists are constantly revising their predictions upward, then this is equally "proof" that climate scientists are under pressure to revise their estimates downward. Far from being "alarmist," such terms are actually cudgels used to discourage climate scientists from making their data look too bad.

    The result is the predictable fudging of climate data to look better than it really is.

    [0] https://en.wikipedia.org/wiki/Oil_drop_experiment#Millikan's...

  • prohobo 2 months ago

    In this thread people talking about a civilization-scale collective action problem that we've never come close to solving, and telling us to use paper straws or regulate the oil industry.

    The only even theoretical solutions are:

    - A magically effective totalitarian state that watches everyone inside a panopticon.

    - Magically undo the damage with a technological breakthrough.

    - Immediately leave Earth.