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A forthcoming collapse of the Atlantic meridional overturning circulation

nature.com

151–160 of 324 posts

Re: A forthcoming collapse of the Atlantic meridional overturning circulation

#151
post #143

Earlier quoted context omitted.

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If by "they" you mean thermometers, sure. I don't need to do anything more than look at temperature readings to see how the climate is changing. I also see that it's clearly an exponential graph. We've already reached the 1.5 degree threshold the Paris Agreement was supposed to avoid, we have done fuck all to avoid it. The next 1.5 degrees will come much faster and the next 1.5 after that faster still. At that point…

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Re: A forthcoming collapse of the Atlantic meridional overturning circulation

#152

Earlier quoted context omitted.

> Question for the community: how does one navigate such uncertainty? Not climate scientist, but researcher in ML (another highly hyped and arguably more noisy field). After Bourbon, the hard truth is expertise + don't. Unfortunately journals/conferences/venues are an extremely noisy mechanism which in general aren't realistically much better than arxiv (at least over here). Peer review isn't journals/conferences, it…

Can you explain what Bourbon is? People are making one-off references to it but I can't find a search query that results in anything relevant to climate or scientific scandals

He's saying to pour yourself a stiff drink ;-)

Re: A forthcoming collapse of the Atlantic meridional overturning circulation

#154
post #152

Earlier quoted context omitted.

Can you explain what Bourbon is? People are making one-off references to it but I can't find a search query that results in anything relevant to climate or scientific scandals

He's saying to pour yourself a stiff drink ;-)

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Re: A forthcoming collapse of the Atlantic meridional overturning circulation

#155

Earlier quoted context omitted.

It's mentions a potential collapse as early as 2025. More precisely 2025-2095. That is this century and it's accurate to say 2025 is imminent.

Yes, but I - and probably you - will die sometime between 2025 and 2095. I wouldn't say that therefore our deaths are imminent.

Right but that's just you making a bad comparison on the timescale of this thing having collapsed previously it's pretty imminent.

Re: A forthcoming collapse of the Atlantic meridional overturning circulation

#156

Earlier quoted context omitted.

critical thinking skills, don't believe everything that you see, perform your own independent investigation of truth.

> critical thinking skills, don't believe everything that you see, perform your own independent investigation of truth. How would one possibly do that here?

Indeed. Even with an adjacent PhD and a decade of adjacent research experience, it took me years to learn the very basics of climate modeling. And there's no way I can keep up with the literature.

Also, I don't have access to a supercomputer (ok, well, I do, but I can't both keep my day job and also use it for re-running climate models when I have a question I want to ask myself about them).

People say "critical thinking" and "do your own research" a lot, and I always wonder what the fuck they think "research" means. Apparently not what I think it means! Or perhaps they do not need sleep, do not have to work for a living, do not have family, have access to huge teams of assistants, and own a world-class supercomputer to help satiate their skepticism, in which case, good for them :)

Re: A forthcoming collapse of the Atlantic meridional overturning circulation

#157

I’m a physical oceanographer. While I have only skimmed this article I would like to make two quick comments. 1) The AMOC is one of the most studied parts of the world ocean and predictions about its collapse have been made since Stommel in 1961. I think in general any study on its imminent collapse should be taken with a grain of salt and it would be wise to wait for further replication and the consensus of the comm…

If you are a real oceanographer, why are you anonymous and using a throw away?

You want to both use your credentials to be taken seriously in your posts, but also you want to avoid too much scrutiny of who you are.

Re: A forthcoming collapse of the Atlantic meridional overturning circulation

#158

Earlier quoted context omitted.

You are completely correct I regret that word choice now. I was rushing to comment because I felt it was important to provide context on AMOC collapse scholarship.

Memento mori: top comment made the same mistake[1], your contributions reinforced the top comment, and your separate individual reply is the second comment. Rushing to comment has deep effects on HN, the threading incentivizes appending to the top comments rather than replying. This will now be a philosophical debate about scientific trust for hours just because people assume the article says "collapse is happening s…

Thank you for your kind tone (genuinely). I understand your concern. I certainly hope it does not become a debate about scientific trust for hours although you are right its headed that way. I have a great amount of trust in the scientific consensus, am a publishing climate scientist myself, and did genuinely enjoy this paper. It is my opinion that is instructive for people to know that studies on AMOC collapse are often misinterpreted when they are spread widely, similar maybe to headlines about experimental new battery designs. I do not think that the authors of the study have any ill intent or that their work is unimportant, but rather that AMOC collapse is an incredibly complex topic and that when studies on it are often posted to sites like hacker news (https://news.ycombinator.com/item?id=28085342 I have been here a decade just not on this throwaway ;) ) they are often taken as a significant change in the understanding of the field which they are not (yet at least).

I see your point that harping on this fact is perhaps boring and repetitive so I apologize for that.

Re: A forthcoming collapse of the Atlantic meridional overturning circulation

#159

Earlier quoted context omitted.

Are you comparing Stommel's Box model to Bower's recent work? I would argue the latter is more "expressive" though yes, it depends on measurements we weren't collecting in the 60s.

No I am just noting that the AMOC bistability literature is decades long.

So is the climate change literature, it stretched back decades before we had concrete evidence that it was happening. Just because something is long predicted to be a risk by experts in a field, doesn't mean its likelihood of happening goes down.

I right read about AMOC back in 1997 while in university. It was fascinating and frightening back then. Still relevant today. It would be sad if it did actually end up happening in my lifetime, but humans are notoriously bad at reacting to bad things that might happening in the future - https://en.wikipedia.org/wiki/Tragedy_of_the_commons. We tend to only really react once the bad thing has happened.

Re: A forthcoming collapse of the Atlantic meridional overturning circulation

#160
post #143

Earlier quoted context omitted.

[flagged]

If by "they" you mean thermometers, sure. I don't need to do anything more than look at temperature readings to see how the climate is changing. I also see that it's clearly an exponential graph. We've already reached the 1.5 degree threshold the Paris Agreement was supposed to avoid, we have done fuck all to avoid it. The next 1.5 degrees will come much faster and the next 1.5 after that faster still. At that point…

The global temperature baseline has only increased 1.16~ degrees Celsius since 1880...

Of course it's going to increase as we continue to come out of the last ice age.

It's being blown way out of proportion though to fear-monger.

And don't get me started on Europe and their fake Paris Climate Agreement. They just wanted money from the US. If they were serious they wouldn't have shut down their nuclear reactors and got hooked on Russian gas / Iranian oil. Only the US has reduced emissions while increasing energy output.

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