Warning of forthcoming collapse of Atlantic meridional overturning circulation

Re:Warning of forthcoming collapse of Atlantic meridional ov... by kneebonian on Tuesday July 25, 2023 @12:37PM (#36865092)

So if this continues it will result in a 5C drop in temprature across North America and Europe? Am I understanding this correctly.

Which for reference a 5C drop should mean that New York is covered in glacier according to this source https://xkcd.com/1732/

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Re:Warning of forthcoming collapse of Atlantic meridional ov... by i_am_jl on Tuesday July 25, 2023 @12:41PM (#36865177)

NYC was covered in a glacier the last time the global average temperature was 5C cooler.

That's not the same thing as Europe and NA cooling by 5C.

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Re:Warning of forthcoming collapse of Atlantic meridional ov... by AbrahamParangi on Tuesday July 25, 2023 @12:45PM (#36865234)

While strictly true, that doesn't mean 5C cooling wouldn't eventually result in NYC under ice.

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Re:Warning of forthcoming collapse of Atlantic meridional ov... by postmortembees on Tuesday July 25, 2023 @01:02PM (#36865561)

You've misunderstood the source. While temperatures locally will drop by 5C, the global average will not.

That chart shows global averages, ie, the whole world was 5C colder. NY might have been much, much colder than that.

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Re:Warning of forthcoming collapse of Atlantic meridional ov... by jmclnx on Tuesday July 25, 2023 @01:22PM (#36865890)

The Ave Temp of the world is rising and from what I read and hope I understood, nothing will really stop that, all we can do is hope to lessen the temp rise.

So, I think this "5C" drop in East NA and West Europe will be absorbed throughout the world. So those regions will still have higher ave temp then say 1950, just a bit less than the rest of the world.

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