"Wild temperature swings" is already quite common in dry places. Sahara can be below freezing during the night. The IPCC predicts that Southern Europe will get dryer, so they will have larger variations.
More humid areas, especially if they're near coasts tend to be a lot more stable.
I think these tendencies will remain true.
While introducing more energy to the atmosphere is likely to generate more winds (including hurricanes), it doesn't seem plausible to me that (given constant humidity) this will be enough to cause enough variation in temperature to make farming impossible in most places.
If you have some reference (preferably something like IPCC, as opposed to something that could be fringe), I would be willing to reconsider.
> you are all over this thread with the same fallacy
Maybe you could state exactly what fallacy you think I'm advocating for? I'm not saying global warming is something good and that we don't need to worry about.
I just don't think it's a likely extinction level threat, like an asteroid, rogue AI, nuclear war, an alien invation etc. Unlike those others, it's almost certain that we will experience some degree of global warming, but if that's the worst we will face, humanity will survive as a species.
Also, there is a couple of other factors:
First of all, I think many that worry about climate change (beyond those who honestly think it will lead to extinction) really care mostly about all the pain and suffering that global warming could bring at some point, at least to some large minority of humanity. Maybe also that it will cause a non-trivial fraction of the population to die from famine, wet bulbs etc.
I don't think that's impossible (though maybe a bit pessimistic, see below), but I think the fallacy that the these people make, is to assume that we will have a future world without such events. Historically, we have seen that bad things have happend from time to time.
The collapse of the Roman Empire caused half the population to die off (partly due to colder weather). The Black Death caused a similar percentage to perish in many place. The Mongol conquests resulted in large parts of the Eurasian steppes to be so depopulated that they still haven't recovered. Then the were the world wars, Bronze Age collapse, and the list goes on.
The future is likely to bring similar events, too. Climate change could possibly be such an event. But usually, these events are not those we expect, but rather some kind of Black Swan that surprises everyone.
The second fallacy that some climate change fanatics seem to ignore, and this one by choice, it seems: We're still very much in a kind of exponential technological development. 200 years is a very long time, and unless the technological development suddenly grinds to a complete halt, we will have a lot of new options both when it comes to minimizing global warming and also to survive any warming we're not able to prevent.
People seem to choose to ignore this based on a better-safe-than-sorry philosophy. That's ok when dealing with risk that we aim to reduce to zero, as long as the cost is low. Kind of putting on a seatbelt when driving.
What many don't seem to realize, is that this is a luxery belief / first world concern. For someone less privileged, like most countries in South Asia or Africa (and also working class people in the west), access to cheap energy now is seen as really important. That means for such people, some risk is acceptable.
Kind of like if the seatbelt on your car is broken, and the nearest grocery store is 20 km away. Do you walk there, or do you drive the car regardless. To do that risk evaluation, you want to know the real risk of driving without the seatbelt.
Similarly, for those most affected short term by for instance ending most fossil fuel use, the REAL risk associated with global warming is relevant.
And to evaluate that, it's actually really relevant to factor in that humanity is likely to grow a lot in technological capability to face new challenges over the next 100-300 years. How much is a matter of opinion, but zero is unreasonable.
As far as I can tell, the most likely scenario is that Climate Change is going to be a challenge for humanity. My best guess is that in most places on Earth, people will find ways to deal with this challenge. But I'm open for the possibility that 100s of millions might die because of it.
I also realize that global warming could be a factor leading up to a nuclear war. I really don't think it would be the main factor, though. I consider nuclear war as a separate risk category.
Most wars are caused by nationalism or religious conflicts, especially betwen the kinds of countries that are likely to have large arsenals. The obvious current example is Ukraine. It's not a famine that drives Putin, it's a desire to Make Russia Great Again.
Compared to reasons such as nationalism, religion or even ideological conflicts, I think global warming would be a significantly smaller risk factor in terms of how it increases the risk of global war.
Another huge uncertainty is the what population Earth will have in the future. Already, it's pretty clear that the population in most developed parts of the world is going to decline rapidly over at least the next 50 years. Population growth is mostly restricted to South Asia and Africa now, and even in South Asia there are indications that it's going down.
It's certainly possible that this can be reversed completely, but if the current trend continues (and assuming Africa also has this trend eventually), the population could be halved every century. That means we will be only 1 billion by 2300.
On the other hand, if the trend reverses back to exponential population growth, we may be up to 30 billion or so by 2300 (unless prevented by starvation).
This is a huge gap! With only 1 billion, it would be far easier both to minimize global warming and to survive it. With 30 billion, it would be very difficult to prevent global warming and also much harder to deal with it when it comes.
And all of this hinges on us being unable to develop AGI/ASI this century. Which is starting to seem unlikely. Most of the researches in the field seem to expect AGI some time in the range from "within 5 years" to "several decades".
If we DO develop AGI before 2100, the exact circumstances around it is going to matter way more than global warming. At the optimistic end, AGI may find ways to completely end global warming.
Or it could cause human extinction before it matters.
So it's not that I don't "believe" in global warming. I generally accept the scientific consensus in most fields, as long as the field actually uses something like the scienific method, and is not just a cover for some ideology.
It's just that it seems to me that many "True Believers" in climate change turn it into something more similar to a religion than the actual science it's based on. And that this causes them to only see this single issue, while generally ignoring almost all other risk factors we're likely to face in the future.