Tropische Wälder sind einem zunehmenden Risiko ausgesetzt, kritischen Temperaturschwellenwerten ausgesetzt zu sein(pnas.org)
pnas.org
Tropical forests facing increasing risks of exposure to critical temp thresholds
https://www.pnas.org/doi/10.1073/pnas.2528622123
24 comments
It's beyond disheartening. In a sick way, we totally deserve getting hit now because it seemed like a lot of climate "reasoning" was "this is going to be bad for future generations, we don't have to worry about it now".
> A couple years ago, I would have expected some kind of awakening with global efforts, but the opposite is the case.
I'm a literal greybeard who has lived in liberal bubbles on the Left Coast my entire life, and the past ten years or so has rudely educated me at how horrible a large segment of humanity is. We have the resources, science, technology and people to live in an approximation of utopia, but instead we have.... this.
> A couple years ago, I would have expected some kind of awakening with global efforts, but the opposite is the case.
I'm a literal greybeard who has lived in liberal bubbles on the Left Coast my entire life, and the past ten years or so has rudely educated me at how horrible a large segment of humanity is. We have the resources, science, technology and people to live in an approximation of utopia, but instead we have.... this.
> We have the resources, science, technology and people to live in an approximation of utopia, but instead we have.... this.
I've argued this exact thing (and been ridiculed as "naive" and "tree-hugging hippie" for it) most of my adult life (until recently where I no longer care because humanity has already made the choice now and nothing I can say or do will change it). We've had the technology, and we've been adding to it for decades now, but still we choose to use it in the worst possible ways, to (further) enrich the worst possible people and burn the world to the ground.
I've argued this exact thing (and been ridiculed as "naive" and "tree-hugging hippie" for it) most of my adult life (until recently where I no longer care because humanity has already made the choice now and nothing I can say or do will change it). We've had the technology, and we've been adding to it for decades now, but still we choose to use it in the worst possible ways, to (further) enrich the worst possible people and burn the world to the ground.
>A couple years ago, I would have expected some kind of awakening with global efforts, but the opposite is the case.
The only thing we can do is slightly tweak the exponential adoption curve of solar, it's already here, already the cheapest option, already growing exponentially. We're right in the meaty part of the growth phase of solar and "moral" adoption pushes really don't have much to do with growth any more.
And also there are positives, CO2 is a potent fertilizer and there is plenty of land area which is uninhabitable and unsuitable for farmland which is going to boom with population and agriculture.
We're up for a century of change and migration and people need to change their tune from "oh no!" to "what's next?"
What's next is a lot of migration to the likes of Canada and Siberia and perhaps some active geoengineering building up the new locations around the globe for rainforests.
You have to let go of the past and embrace the future because crying about losing the Earth as it was 200 years ago will get you exactly nowhere.
The only thing we can do is slightly tweak the exponential adoption curve of solar, it's already here, already the cheapest option, already growing exponentially. We're right in the meaty part of the growth phase of solar and "moral" adoption pushes really don't have much to do with growth any more.
And also there are positives, CO2 is a potent fertilizer and there is plenty of land area which is uninhabitable and unsuitable for farmland which is going to boom with population and agriculture.
We're up for a century of change and migration and people need to change their tune from "oh no!" to "what's next?"
What's next is a lot of migration to the likes of Canada and Siberia and perhaps some active geoengineering building up the new locations around the globe for rainforests.
You have to let go of the past and embrace the future because crying about losing the Earth as it was 200 years ago will get you exactly nowhere.
That new land has thin, acidic, waterlogged soil with few nutrients, is unstable and prone to collapse (see thermokarst), with photoperiods not suited for what those crops need. What's next is a world of hurt, especially if approached with techno-optimist myopia.
It's fine. We can just add fertilizer -- made from petroleum extraction of course then fire up some coal power plants for artificial grow lights.
Thus solving the problem once and for all.
Thus solving the problem once and for all.
Thanks Gemini for your reply.
It is not worth discussing anything with a doomer that has no knowledge besides what an LLM can tell them.
It is not worth discussing anything with a doomer that has no knowledge besides what an LLM can tell them.
That's a cheap dismissal - if you had any good counters, you would have attacked the reasoning instead of reaching for that.
No it's not, I'm perfectly willing to discuss the sibling comment. I'm not willing to discuss with an LLM with a human intermediary. Your answer parrots what Google (gemini) says when you search with a question targeted as disagreeing with me. (I tried, out of curiosity)
I already had the topsoil argument in mind before involving an LLM but your argument is that I shouldn't adopt more precise language or add claims I didn't originally think of because of the source? How is information from a search engine different? Should people purposely have shallower debates whereby they pretend not to know new information simply to appear organic / avoid LLM allegations? You would put an expert into the same bucket for having a comprehensive argument.
If you start with a doomer mentality it is already very unlikely that you have any wish to discuss anything, you just want to create a list of arguments that all end with some variation of "we're doomed".
Paired with an LLM which regardless will generally be ~80% agreeable with you, the conversation will literally be unending. After each point there will be a rebuttal of doom and very little reason involved on the human side in the middle. Unable to be convinced of anything and paraphrasing LLMs all along the way, the conversation is pointless.
If I wanted an endless disagreement with an LLM I could set that up in my own time, I don't have to do it in public. Or I could find a friendly toddler in their "Why?" phase.
If you'd like we can prime a couple of LLMs with our opinions and watch them go back and forth without us.
Paired with an LLM which regardless will generally be ~80% agreeable with you, the conversation will literally be unending. After each point there will be a rebuttal of doom and very little reason involved on the human side in the middle. Unable to be convinced of anything and paraphrasing LLMs all along the way, the conversation is pointless.
If I wanted an endless disagreement with an LLM I could set that up in my own time, I don't have to do it in public. Or I could find a friendly toddler in their "Why?" phase.
If you'd like we can prime a couple of LLMs with our opinions and watch them go back and forth without us.
On the flipside, if you suffer from positivity bias you'd probably be able to ignore an existential threat if it spit in your face.
That's okay, hope you enjoyed your petty digs - the world is a simple closed system that just needs some sulfur pixie dust to patch up and all the scientists are doomers. Thanks for your contributions.
In the global share of primary energy solar is this very small player (less the hydro, much less then coal, or natural gas, or oil), data from 2024.
https://ourworldindata.org/energy-production-consumption
How much does the increase solar production decrease world-wide CO2 emmisions? Because CO2 emissions in 2025 were still increasing. I see that in many growing countries solar power is not seen as a replacement for fossil power, but as an addition to fossil power.
https://www.iea.org/reports/global-energy-review-2026/co2-em...
There are many places where the photosynthesis is not limited in CO2 amounts, but in amounts of other elements, like iron (about one third of the surface ocean), phosphorus (tropical rainforests).
https://www.us-ocb.org/microbial-iron-limitation-otz/
https://www.jircas.go.jp/en/release/2022/press202218
Warming of Siberia could increase methane leakage, which could increase global warming and then increase in methane leakage, the “methane time bomb”
https://www.smithsonianmag.com/smart-news/ticking-timebomb-s...
In the Earths history, we know of periods of emission of large magnitudes of CO2. One of them is Permian–Triassic extinction event (level of atmospheric carbon dioxide rose from around 400 ppm to 2,500 ppm), extinction of 57% of biological families, 62% of genera, 81% of marine species, and 70% of terrestrial vertebrate species.
https://en.wikipedia.org/wiki/Permian%E2%80%93Triassic_extin...
Lets hope we don't reproduce the PT event.
https://ourworldindata.org/energy-production-consumption
How much does the increase solar production decrease world-wide CO2 emmisions? Because CO2 emissions in 2025 were still increasing. I see that in many growing countries solar power is not seen as a replacement for fossil power, but as an addition to fossil power.
https://www.iea.org/reports/global-energy-review-2026/co2-em...
There are many places where the photosynthesis is not limited in CO2 amounts, but in amounts of other elements, like iron (about one third of the surface ocean), phosphorus (tropical rainforests).
https://www.us-ocb.org/microbial-iron-limitation-otz/
https://www.jircas.go.jp/en/release/2022/press202218
Warming of Siberia could increase methane leakage, which could increase global warming and then increase in methane leakage, the “methane time bomb”
https://www.smithsonianmag.com/smart-news/ticking-timebomb-s...
In the Earths history, we know of periods of emission of large magnitudes of CO2. One of them is Permian–Triassic extinction event (level of atmospheric carbon dioxide rose from around 400 ppm to 2,500 ppm), extinction of 57% of biological families, 62% of genera, 81% of marine species, and 70% of terrestrial vertebrate species.
https://en.wikipedia.org/wiki/Permian%E2%80%93Triassic_extin...
Lets hope we don't reproduce the PT event.
Solar energy production has increased 20-30% year over year every year for the last decade. If this continues peak oil production will occur in the next five years, if not 2026 itself. The wars in Iran and Ukraine are added global motivation for this change.
The velocity and acceleration of CO2 and energy production are the far more important metrics.
>Lets hope we don't reproduce the PT event.
When/if we really need to we can spend tens of billions to fertilize ocean deserts and trigger thousand mile scale algae/jellyfish blooms and maybe nuke a few mountain ranges in the right places to hard accelerate biological and chemical capture of CO2.
If the ice caps actually melt we can replicate the Azolla event when, to simplify, the arctic ocean became much less salty and freshwater essentially duckweed covered the ocean causing global climate change.
Enacting forced major climate change in a restorative direction is entirely within our grasp to prevent mass extinction events, they just have their own caveats which have to make it worth it before we go for it.
The velocity and acceleration of CO2 and energy production are the far more important metrics.
>Lets hope we don't reproduce the PT event.
When/if we really need to we can spend tens of billions to fertilize ocean deserts and trigger thousand mile scale algae/jellyfish blooms and maybe nuke a few mountain ranges in the right places to hard accelerate biological and chemical capture of CO2.
If the ice caps actually melt we can replicate the Azolla event when, to simplify, the arctic ocean became much less salty and freshwater essentially duckweed covered the ocean causing global climate change.
Enacting forced major climate change in a restorative direction is entirely within our grasp to prevent mass extinction events, they just have their own caveats which have to make it worth it before we go for it.
So wouldnt it make sense to give up on the protect a disneyland of nature idea, and genemodify the rainforrest to adapt to heat? Fast forward around die off,adaption,recovery?
I only buy certified organic non-GMO rainforest, so save a patch for me before you burn the rest of it down and replace it with a monocrop.
How exactly would you do this? And over what time span would you expect it to be effective?
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Not sure more meddling with nature is the best idea given our past history of it. There is a good chance you fix one problem and create 10 more!
The only meddling with nature that went horribly is repeatedly introducing invasive species, then seeing the result after a short time.
And the part that isn't discussed at all, of course, is that that happens all the time in nature.
Of course the solution to climate change is humanity taking control of the climate. But the problem with that is equally simple: warming is inconvenient, but generally helps everyone. Cooling, on the other hand, ... or even merely stopping the warming.
For example, changes in Himalayan glaciers melting could affect the timing and reliability of water supplies in parts of the world, especially the Ganges Basin, particularly during dry periods. 700 million people depend on that water, not even counting the fact that the other side of the same mountain is the majority of Pakistan's water supply. Massive people displacements are likely to be unavoidable.
Note that glacier melting will stop, after a balancing period, not because it starts cooling. Merely keeping the temperature level will do that.
Large areas of the planet and very significant parts of the human population depend on global warming continuing.
And the part that isn't discussed at all, of course, is that that happens all the time in nature.
Of course the solution to climate change is humanity taking control of the climate. But the problem with that is equally simple: warming is inconvenient, but generally helps everyone. Cooling, on the other hand, ... or even merely stopping the warming.
For example, changes in Himalayan glaciers melting could affect the timing and reliability of water supplies in parts of the world, especially the Ganges Basin, particularly during dry periods. 700 million people depend on that water, not even counting the fact that the other side of the same mountain is the majority of Pakistan's water supply. Massive people displacements are likely to be unavoidable.
Note that glacier melting will stop, after a balancing period, not because it starts cooling. Merely keeping the temperature level will do that.
Large areas of the planet and very significant parts of the human population depend on global warming continuing.
Forests take hundreds of years to become mature and healthy.
If your magical yet-to-be-invented gene treatment technology works the first time around, you will see results centuries from now.
If your magical yet-to-be-invented gene treatment technology works the first time around, you will see results centuries from now.
Anybody have a non paywall link to the paper?
https://web.archive.org/web/20260711174045/https://www.pnas....
that's just background/abstract, might be better to access journals through your library
that's just background/abstract, might be better to access journals through your library
To my surprise, media coverage nowadays is mostly about heat waves as a phenomenon, leaving human impact on it aside.
A couple years ago, I would have expected some kind of awakening with global efforts, but the opposite is the case.