From Prof. Eliot Jacobson:

Wow! Wow! Wow!

North Atlantic sea surface temperature anomalies are going vertical again. And yes, I needed to extend the y-axis.

Yesterday’s temperature of 24.49°C (76.08°F) was 4.2σ above the 1991-2020 mean. The previous high for July 17 was 23.71°C (74.68°F) in 2020.

https://twitter.com/EliotJacobson/status/1681321023306874880

  • Chainweasel@lemmy.world
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    1 year ago

    It takes about ~30 years to see the effects of emissions on the climate. That means the climate crisis we’re experiencing right now is only the emissions up to ~1993. Looking at CO2 emissions alone, in 1993 the global total was 22.8 billion tonnes. The latest Data available is from 2021, which shows the global CO2 emissions at 37.1 billion tonnes. That’s in increase of 14.3 billion tonnes of annual CO2 emissions in the amount of time it takes us to feel the effects, that’s a 61% increase in Annual emissions, Not Total emissions. If we stopped all CO2 emissions today, it would continue to get considerably worse for at least the next quarter-century. We are truly Fucked on the bleeding edge of that climate “tipping point” and major changes are about to start happening very rapidly.

    source for CO2 emissions numbers: https://ourworldindata.org/co2-emissions

    • Cybermass@lemmy.world
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      1 year ago

      Where did you learn that CO2 emissions take 30 years to have an effect on our atmosphere?? I’ve never heard that.

        • FrankLaskey@lemmy.world
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          1 year ago

          I imagine you noticed this but that second citation (from your edit) has this at the top of the article:

          Update August 9, 2020: Please be aware that this article was published in 2010 and that its content is no longer considered accurate. As it still gets regularly linked to from other websites, we will not delete or “unpublish” it. Instead, here is the link to a better take on this topic published by our late team member Andy Skuce in 2013: Global Warming: Not Reversible but Stoppable.

          • possibly a cat@lemmy.mlM
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            1 year ago

            Pretty major caveat:

            This linear relationship isn’t determined by any physical properties of the climate system, and probably won’t hold in much warmer or cooler climates, nor when other feedback processes kick in.

            The argument that all of this is based on is proposed by one researcher, and it boils down to climate sensitivity currently counteracting the effects of carbon sensitivity roughly equally. So we know that the furthest extent this buffering influence will have is until the ocean stops absorbing roughly 90% of extra heat, which hits its own limit when the poles reach heat of fusion (and the ice completes the phase change to water).

            At this point the land starts experiencing heat increases directly. It is considered a tipping point that will send climate change’s impact to a new order of magnitude, essentially. And tipping points are hypothesized to tip like dominoes - leaving the new equilibrium exponentially far away from the old climate.

            Polar ice studies have been pretty dire lately. You will get various estimates, but an ice free Antarctic is quickly approaching. Regional crises could be observed even next year due to local influences of El Niño weather patterns. There is very real potential for virtually ice free poles by 2035. The way things are going, it could occur before 2030.

            So let’s take the follow discussion and it’s citation. Let’s go ahead and suppose that stopping emission increases will slow the rate of warming, and that going to zero emissions will halt warming but not reduce it. Let’s suppose not of the minor limitations and exceptions come into play, and just consider that warming curve. (This wasn’t even the point of the follow-up article, the point was that the social challenges are greater than the scientific ones).

            Can we stop all emissions by 2030? Or even 2035? Do we ever see that happening? Not just emission increases, but emissions altogether?

            Because if we don’t, the poles melt and a heat bomb goes off. Somewhere between now and that point, ocean life dies causing huge areas to go anoxic and turn toxic, and food pyramids collapse.

            Meanwhile we don’t have any carbon capture methods that are even theoretically viable, and scientists are starting to warn that that CC solutions will not arrive in time to prevent a collapse of civilization.

            Thanks for pointing out the follow-up. It and the other presentation are worth a read, because it is good to inform yourself. But it’s also good to understand the limitations of a thesis. This buffering act will help us but it won’t be able to do so much longer. And we don’t even have a plan.

            Comment my own thesis: If you’ve got an idea that’s less insane than filling the skies with sulfur dioxide, don’t let me slow you down for an instance. I just want to make sure that people understand the scope of the situation. It’s… quite very bad.

      • perestroika@lemm.ee
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        1 year ago

        I think it’s a misunderstanding, not a myth.

        CO2 influences the greenhouse effect - keeping more solar energy on Earth.

        Solar energy gets converted into heat, heat gets absorbed. Some of it gets absorbed by oceans. Some of CO2 also gets absorbed by oceans - their pH decreases. The greenhouse effect doesn’t require great time, but oceanic warming and acidification does require time. Interaction happens on the surface, but the volume is great.

        Thus, delays in response are inevitable. Response may also depend on circulation - an ocean current slowing or speeding up.

      • BastingChemina@slrpnk.net
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        1 year ago

        Imagine a bull in a china shop destroying everything, now there is two options :

        • 1- you take the bull out of the shop
        • 2- you decide that it would be to inconvenient to take the bull out but you are sure that in a few decades we will invent a technology that can repair the China faster than the bull is destroying it.

        Carbon capture is the option 2, we continue to break the carbon molecules for energy pretending that we can recapture later. It’s not gonna happen, we need to stop emitting NOW and maybe we can think about carbon capture.

      • xapr [he/him]@lemmy.sdf.org
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        1 year ago

        Apparently the scale that’s required makes it completely impractical, especially given the timelines that are also required.

        • possibly a cat@lemmy.mlM
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          1 year ago

          As far as I know, we don’t have any CC ideas that wouldn’t push us over our emissions limit to create at the scale we would need.

        • theneverfox@pawb.social
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          1 year ago

          Only in the way that can be monetized or industrialized, and only if we actually cut down on emissions (instead of just slowing the growth rate a little)

          There’s plastic bottles everywhere. There’s people everywhere. What if every human spent an hour a day on little algae bioreactors? It’s grade school level science, all you need is bottles, non-potable water, a knife, and any old cloth to strain it out.

          And, of course, algae… But once you get started, that’ll be easy to come by. It’ll even naturally adapt to local conditions, and there’s versions that can be used as food - the rest can be dried and used as fertilizer. It not only provides nutrients and increases water retention, it also helps mycillium regrow, repairing the soil. This also reduces runoff and feeds into water tables

          Ever since this idea popped into my head, I’ve felt there’s something there - I met someone working for a company that is doing this commercially, and I can’t help but think if we can do it in a distributed manner it could help with a lot of issues

            • Gork@lemmy.ml
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              1 year ago

              Gamify it. Everyone starts out with a basic setup. The organization coordinating the effort can add additional incentives. Add achievements, unlockables, larger setups, rare algaes and algae colors. Loot boxes with various supplies. Three factions that compete against each other. Leaderboards, both local and global.

              It would be simultaneously competitive and cooperative towards a common goal.