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Science/nature/environment

Possible gulf-stream collapse

(110 Posts)
GagaJo Fri 06-Aug-21 00:46:29

I find this terrifying.

www.theguardian.com/environment/2021/aug/05/climate-crisis-scientists-spot-warning-signs-of-gulf-stream-collapse

Racingsparrow Tue 19-Oct-21 12:49:08

As a matter of interest do you have a science based education?

Alegrias1 Tue 10-Aug-21 11:19:09

Summary of the Jet Stream and the weather it creates:
The position of the jet stream over the UK determines the type of weather we experience.
If the polar front jet is situated significantly to the south of the UK we will experience colder than average weather.
If the polar front jet is situated to the north of the UK we will experience warmer than average weather.
If the polar front jet is situated over the UK we will experience wetter and windier than average weather.

www.netweather.tv/charts-and-data/jetstream/tutorial

Video from the Met office, about 3 minutes in: www.youtube.com/watch?v=Lg91eowtfbw&t=304s

Katie59 Tue 10-Aug-21 10:38:22

“Its Global Warming that's causing the change to the Gulf Stream. You've got it the wrong way round re the jet stream; as it moves North, the UK gets warmer.”

It’s the jet stream winds that govern our weather if it is to the south it’s warm, from the north it’s cold. In April the jet stream moved almost due north and brought an Arctic airflow right across the UK.

One theory is that as polar air becomes warmer the jet stream winds will weaken, will that cause more or less extreme weather events?.

Alegrias1 Tue 10-Aug-21 09:19:08

Its Global Warming that's causing the change to the Gulf Stream. You've got it the wrong way round re the jet stream; as it moves North, the UK gets warmer.

If you want scientific authority I'll just look out my Physics PhD certificate and copies of the papers I wrote on renewable energy sources. Or I'll ask DH to send you links to his work on forest cover. (Except I won't because it will out us.)

We're not getting this from the Guardian as part of a big environmentally focussed plot, its the truth.

Katie59 Tue 10-Aug-21 09:04:38

The OP highlighted the Gulf Stream changes in addition to Global Warming as it affects the UK, we simply don’t know how that will affect the UK, there are a great many unknowns and anyone with any scientific authority will acknowledge that.

Probably the largest influence on the UK weather is the jet stream which maintains the westerly prevailing wind, when that moves north it gets colder, warmer if it moves south, that is affected by global warming as well.

Alegrias1 Mon 09-Aug-21 18:18:25

Katie59

Global warming is a fact of life, Arctic ice is melting and influencing the Gulf Stream, as temperatures increase.

That is a very long way from deducing that the climate in the UK is going to get warmer or colder, a third possibility is that the two will cancel each other out and we retain the temperate maritime climate we have now.

Really, you should not believe everything you read in the Guardian, you see “could”, “might” and “if” everywhere, it is just whatever the Guardian selects to suit its environment agenda and is certainly not scientific conclusion.

Myself, I acknowledge climate change is happening, I do not believe the global population will change its consumption enough to reduce global warming

I'm glad you have assimilated the facts behind the melting Arctic ice and the impact that will probably have on the Gulf Stream.

Now we just need you to understand that it's not only the UK that we need to worry about.

I don't trust The Guardian as a source of scientific research about the climate. NASA, JPL and the IPCC now, they know what they're talking about. Like WWM2's son.

Whitewavemark2 Mon 09-Aug-21 18:04:51

Katie59

Global warming is a fact of life, Arctic ice is melting and influencing the Gulf Stream, as temperatures increase.

That is a very long way from deducing that the climate in the UK is going to get warmer or colder, a third possibility is that the two will cancel each other out and we retain the temperate maritime climate we have now.

Really, you should not believe everything you read in the Guardian, you see “could”, “might” and “if” everywhere, it is just whatever the Guardian selects to suit its environment agenda and is certainly not scientific conclusion.

Myself, I acknowledge climate change is happening, I do not believe the global population will change its consumption enough to reduce global warming

I don’t believe everything I read in the guardian, I get my facts from my son who is an environmental scientist dealing with the consequences of climate change on a daily basis.

Katie59 Mon 09-Aug-21 17:57:16

Global warming is a fact of life, Arctic ice is melting and influencing the Gulf Stream, as temperatures increase.

That is a very long way from deducing that the climate in the UK is going to get warmer or colder, a third possibility is that the two will cancel each other out and we retain the temperate maritime climate we have now.

Really, you should not believe everything you read in the Guardian, you see “could”, “might” and “if” everywhere, it is just whatever the Guardian selects to suit its environment agenda and is certainly not scientific conclusion.

Myself, I acknowledge climate change is happening, I do not believe the global population will change its consumption enough to reduce global warming

Alegrias1 Mon 09-Aug-21 15:22:53

You will note that they use “could” change ocean currents.

We can't wait and see, though, can we. It will be too late then. Why would we take the risk?

Katie59 Mon 09-Aug-21 15:15:38

Here is a link that explains that scenario in more detail
You will note that they use “ could” change ocean currents.

climate.nasa.gov/news/2950/arctic-ice-melt-is-changing-ocean-currents/

Alegrias1 Mon 09-Aug-21 14:13:30

Great minds, WWM2 smile

Whitewavemark2 Mon 09-Aug-21 14:13:10

areas, not read.

Whitewavemark2 Mon 09-Aug-21 14:12:40

?

Whitewavemark2 Mon 09-Aug-21 14:12:03

The Gulf Stream is slowing because of the ice melt and the amount of fresh water entering the sea.

Not only will affect the U.K., - I don’t think that people generally understand the profound influence that it has on the U.K. climate- but it will disrupt the monsoon and hurricane season, Antarctic ice melt and rain forests.

Food production will fail in thousands of read of the world.

Alegrias1 Mon 09-Aug-21 14:07:15

Greenhouse gases cause the earth's atmosphere to heat up. More heat is equivalent to more energy. At increased temperatures, ice melts. I don't think anyone would argue with that. So, the ice caps melt.

So as the ice melts, the oceans become less salty. The Gulf Stream is partly driven by the circulation of currents in the Atlantic which is dependent on the salinity of the oceans. Less salinity, more likely that the circulation changes, so more likely that the Gulf Stream gets diverted or stops all together. The Gulf Stream is responsible for carrying warm air to Northern Europe, so if it fails, we get less warm air delivered and locally the temperature falls.

Not only is it not a contradiction, both these things are as a result of the same process.

Katie59 Mon 09-Aug-21 13:58:20

Alegrias1

^How do you describe two opposite predictions of how climate change is going to affect us^

Evidence of this? Got any?

I'll wait.

www.theguardian.com/us-news/ng-interactive/2020/oct/13/arctic-ice-melting-climate-change-global-warming

This probably has just as much credibility as to Gulf Stream predictions.

If both happen together it’s hard to believe it’s going to get colder Whitewave

Whitewavemark2 Mon 09-Aug-21 13:53:10

Uninhabitable!

Whitewavemark2 Mon 09-Aug-21 13:50:34

Other parts of the world will become inhabitable, resulting in mass migration.

Whitewavemark2 Mon 09-Aug-21 13:49:10

Katie59

Alegrias1

All these climate change predictions are just speculation, we just don’t know whether it is going to get warmer, or if the Gulf Stream changes it will get colder.

I've given up being polite.

This is tosh. You have no idea what you're talking about.

How do you describe two opposite predictions of how climate change is going to affect us

If it’s not speculation what is it?.

Because the two can happen simultaneously

DS is an environmental scientist who has been mitigating against climate change for years.

I was talking to him last night, and he is very gloomy about the future, largely because he has very little or no faith in the politicians.
When the Gulf Stream does stop - it is already juddering- it means that the U.K. will no longer be warmed by the stream, our climate will cool. However there will be some mitigation from the climate warming, but not sufficient to prevent a possible major issue relating to the shortening of a growing season. We already import an enormous amount, but given the fact of climate change and the difficulties the entire world will have with food security, we really will have profound sues relating to our food security

Katie59 Mon 09-Aug-21 13:48:15

So we have one group predicting the Arctic ice cap melting and it’s going to get warmer and another group saying the Gulf Stream is going to stop and it will get colder.

Who do we believe?.

Alegrias1 Mon 09-Aug-21 13:44:41

How do you describe two opposite predictions of how climate change is going to affect us

Evidence of this? Got any?

I'll wait.

Kali2 Mon 09-Aug-21 13:43:04

Me too.

Not just tosh, very very dangerous tosh, and the reason we are where we are now. It is accelerating very fast and out of control- due to such attitudes.

Whitewavemark2 Mon 09-Aug-21 13:38:42

I’m afraid I have to agree with alegrais

Katie59 Mon 09-Aug-21 13:37:41

Alegrias1

^All these climate change predictions are just speculation, we just don’t know whether it is going to get warmer, or if the Gulf Stream changes it will get colder.^

I've given up being polite.

This is tosh. You have no idea what you're talking about.

How do you describe two opposite predictions of how climate change is going to affect us

If it’s not speculation what is it?.

Alegrias1 Mon 09-Aug-21 13:26:08

All these climate change predictions are just speculation, we just don’t know whether it is going to get warmer, or if the Gulf Stream changes it will get colder.

I've given up being polite.

This is tosh. You have no idea what you're talking about.