Climate Change

[Lirefighter]

Do you have a reference ? I can't find one and neither can Chat GBT

Chat GBT come up with these two know rapid changes -

• After the last Ice Age (~20,000 years ago), global temperatures rose about 5°C over ten thousand years.
• During the Paleocene–Eocene Thermal Maximum (~56 million years ago), the Earth warmed 5–8°C over about 20,000 years.

but to put that into context with todays change
our temperature is rising at about 0.2°c per decade

that is a lot more rapid than the two above which were more like 0.005°c per decade
so temperature is rising now 40x faster than the most rapid natural rise

They (climatologists) cannot narrow down something that happened 20000 years ago to a tolerance of 1000 years, nevermind 10, or 50.
They don't know how fast climate, (temperature) over the entire earth,changed in the past to within a century, even a millenia is problematic without some catastrophic event happening as a marker.

 

[carmanmemoranda]

They (climatologists) cannot narrow down something that happened 20000 years ago to a tolerance of 1000 years, nevermind 10, or 50.
They don't know how fast climate, (temperature) over the entire earth,changed in the past to within a century, even a millenia is problematic without some catastrophic event happening as a marker.

But you can find figures that you say are precedented ?

Either the info is there, or it isn't.

 

[aveatry]

But you can find figures that you say are precedented ?

Either the info is there, or it isn't.

What you are looking for is the results from the GISP One ice Core

 

[noseall]

Lovely area.

It’s a region of France that seems to have a micro climate, so despite being a long way up from the South of France, it can be nearly as warm and dry.

34 degrees when we left today. Came home in a storm (again!).

 

[MNW67]

I'm just enjoying the use of the word precedented. It's not part of my usual lexicon, but I am going to try to use it more.

 

[carmanmemoranda]

What you are looking for is the results from the GISP One ice Core

yes, it doesn't support what you are claiming though.

 

[aveatry]

yes, it doesn't support what you are claiming though.

I doubt that you have had time to read and understand it all

 

[carmanmemoranda]

I doubt that you have had time to read and understand it all

Dr J Storrs Hall I assume you are referring to

 

[Notch7]

They (climatologists) cannot narrow down something that happened 20000 years ago to a tolerance of 1000 years, nevermind 10, or 50.
They don't know how fast climate, (temperature) over the entire earth,changed in the past to within a century, even a millenia is problematic without some catastrophic event happening as a marker.

WRONG

 

[Notch7]

I doubt that you have had time to read and understand it all

You understand nothing.

You think the world would be able to grow more crops if CO2 increased.

You think the location of a weather station proves something, but you don’t understand the temps have been recorded at the same place for many years yet temps keep going up.


You are a rather sad conspiracy theorist.

 

[Lirefighter]

But you can find figures that you say are precedented ?

Either the info is there, or it isn't.

No, there is no data available that shows the climate changed by 1.5°C between 15,050BC, and 15,000BC.
As I said they don't have a scooby, because it is impossible to determine.
That is why the mantra of "it's never warmed this fast, ever" is a load of *******s.

 

[Munroast]

They (climatologists) cannot narrow down something that happened 20000 years ago to a tolerance of 1000 years, nevermind 10, or 50.
They don't know how fast climate, (temperature) over the entire earth,changed in the past to within a century, even a millenia is problematic without some catastrophic event happening as a marker.

it seems highly unlikely to me too, however it is widely thought of as accurate and not many scientists seem to dispute it - as such I will go along with the mass of scientists

copied this of internet - all well beyond my understanding but why should I doubt it, I don't buy this argument that 90%+ of renowned scientists are on the take - why would they be, so many of them! often retired with nothing to gain

• Ice cores offer some of the most accurate and direct evidence for Earth’s past climate.
• They provide an unbroken timeline of atmospheric CO₂, CH₄, temperature, and other climate indicators going back 800,000 years, with uncertainties in the range of decades to centuries, depending on depth and dating method.

1. Annual layers: In some cores (especially Greenland), seasonal changes leave visible layers — like tree rings — allowing precise dating, year by year.
2. Gas bubbles: Air trapped in bubbles preserves actual samples of ancient atmosphere — direct CO₂ and CH₄ measurements, not just proxies.
3. Stable isotopes: Ratios like δ¹⁸O and δD give indirect but reliable records of past temperatures.
4. Global events: Volcanic eruptions, solar cycles, and methane spikes show up in multiple cores around the world, confirming dates.

Limitations:​

• Older than ~100,000 years, annual layers can blur due to ice compression.
• The exact age of gas bubbles can be uncertain by a few hundred years, because gas gets sealed in ice a bit after the snow falls.
• Temperature reconstructions from isotopes are regional, not global — but widely supported by other evidence.

 

[denso13]

That is why the mantra of "it's never warmed this fast, ever" is a load of *******s.

Good job no one is claiming that then.

 

[Justin Passing]

Paleoclimate records, such as ice cores and tree rings, indicate that current warming rates are unprecedented in the last 2000 years. Studies such as the 2013 IPCC report show that earlier natural climate shifts, like the Mediaeval warm period or Little Ice Age, occurred over centuries, not decades.
That said, natural local variability like El Nino events, can amplify short term warming, and skeptics argue that these can amplify the trend.
Long term data - global temperature records, glacier retreat and sea level rise, consistently show an "anthropogenic fingerprint". You'll have to look that up - it's a fairly complex, but convincing argument. As I mentioned before, we have enough evidence to join the dots.

 

[denso13]

Paleoclimate records, such as ice cores and tree rings, indicate that current warming rates are unprecedented in the last 2000 years.

It got warm fast during the big bang. So it has been worse than now...