Hottest Summer For 2000 Years?
By Paul Homewood
This latest story is conclusive evidence that climate “science” has lost all scientific credibility, and is no more than politicised propaganda:
:
The summer of 2023 was the hottest for 2,000 years in the northern hemisphere, according to new Cambridge University analysis.
Humanity has not known hotter weather since the early days of the Roman Empire and the birth of Jesus Christ, the latest study shows.
Overall, last summer was 2.2°C hotter on land than the average temperatures for the years between 1AD and 1890AD, when the industrial revolution was in full swing, pumping huge amounts of climate warming greenhouse gas into the atmosphere.
It was also almost 4°C hotter than the coldest summer in 536AD – when an ash cloud from a volcanic eruption is thought to have caused temperatures to plunge.
‘When you look at the long sweep of history, you can see just how dramatic recent global warming is,’ said co-author Professor Ulf Büntgen, from Cambridge’s Department of Geography.
Reliable weather records produced by scientific instruments only date back to 1850 when the industrial revolution was getting under way.
But by analysing tree rings, scientists were able to calculate how hot summers have been by the growth of the tree ring and chemical composition of the wood.
Trees have narrower growth periods – creating narrower rings – during cold periods and wider rings during hot periods.
So they claim to know the exact temperature of the NH to hundredths of a degree for the last 2000 years just by using tree rings, something that we do not even know now.
And tree rings are pretty much useless as an indicator of temperature, because they can vary in width because of changes in precipitation, not to mention CO2.
But what we do know about the climate that far back strongly suggests it has been much warmer during that time.
We know for instance that Greenland was considerably warmer than now during both Roman and Medieval times:
https://archiv.klimanachrichten.de/temperatures-over-the-past-10000-years/
And we also know the same applies across the Arctic as a whole:
https://www.sciencedirect.com/science/article/abs/pii/S0277379116300427
Pollen data from Sweden tells the same story:
https://link.springer.com/chapter/10.1007/978-3-319-16006-1_2/figures/6
Tree line studies confirm a much warmer climate in California and the Alps
HH Lamb
And as glaciers in Alaska recede they are uncovering remains of forests dating back to the Middle Ages:
These examples are just the tip of the iceberg. Many other studies come to similar conclusions.
Real scientists must be horrified by the abuse of the scientific process, which is all too common nowadays in the climate establishment.
Comments are closed.
NOT A LOT OF PEOPLE KNOW THAT 
The British summer of 2023 was cold and miserable. We lived through it.
The temperatures used for the current measurements overstate the reality as more and more are affected by increased urban sprawl. Tree rings are not a guide to temperature.
Why do we have to put up with this rubbish?
Well, It is definitely a GENERATIONAL thing …. and the wimps of the older “liberal” laissez faire generations let go control to aggressive progressive “liberals” the Uniparty, perhaps, or not , I dunno.
Where’s the wind these days ? since around 5th May ( NOWT to speke of ) Herons are starving – no fish in the pond needing me to give them some sustenance = Windmills aren’t generating so there is no electricity running on the Pylon lines and so they need SUBSIDIES to keep them alive.
They dont use measurements, they use computer models. Their claims are not based on data or evidence but on their computer game. They are not scientists as they dont use the ‘scientific method’.
Triggered now for rest ‘v day
This site is fairly good for real temps .https://temperature.global/
It constantly takes readings from all around the world and gives a overall temperature as an average over 30 years . It does show that 2023 was 0.25C above that average , but also shows that the previous years were all below average , which is different to what all of the Eco loons keep claiming .
Urban heat effect will have tended to show a slightly rising overall reading on gauges , but the constant lies and propaganda coming from the media and politicians is proved to be wrong again , just like all of their climate predictions .
That site doesn’t tell us how it arrives at the average either.
It is very short on details, including who is behind it.
kzbkzb , try actually reading the details on that site .
Bot alert!
Temperature Global calculates the current global temperature of the Earth. It uses unadjusted surface temperatures. The current temperature is the 12M average mean surface temperature over the last 12 months compared against the 30 year mean. New observations are entered each minute and the site is updated accordingly. This site was created by professional meteorologists and climatologists with over 25 years experience in surface weather observations.
Perhaps you ought to actually inspect the site before posting nonsense about it.
I have done so in the past. Who is running it exactly? I couldn’t find anything on that.
Much better methinks to rely on local weather station data, such as found at weatherspark.com.
https://rclutz.com/2023/07/07/june-2023-the-hottest-ever-not-so-fast/
Off topic , but something in the news about water contamination in the west country making a lot of people ill.
Heat pumps do not make the water hot enough to kill off Salmonella , so an immersion heater is also needed . How many of them will be working properly , or even used . And if there is an outbreak of cases from that , will it actually get reported in the media .
More junk science from the “experts” at Cambridge Uni.
Does anyone remember this fraud.
https://www.theguardian.com/environment/2012/sep/17/arctic-collapse-sea-ice
It is now obligatory at Cambridge to mouth the shibboleths if one has any academic ambitions. Amazing that they decided to get Mann’s old nag out of pasture and run it round the track again. So many refutations of this nonsense since 1998. They must have figured they had a better method of hiding the decline.
I wonder if it is still obligatory to publish error bars. Off they say they can discern differences to a hundredth of a deg based on a tree-ring, what are the limits?
I wonder what Wadhams now thinks of his forecast, and whether he might comment on it in these columns, or has he left the country?
2023 was most likely the warmest year of the past 5000 years. Globally, the summer was probably the warmest too, after a Pacific Ocean El Nino heat release started in June 2023.
Areas not affected by that El Nino may not have set temperature records. Here in SE Michigan, we had an unusually cool Summer in 2023, with an unprecedented amount of rain. But my home state is not the whole world.
What actual evidence do you have for any of those claims?
It likely was not.
Ah, tree rings…Mann made global warming.
All such patent nonsense; to wit, it’s like an admission that climate changes over time and is not the result of man’s current highly industrialised, fossil fuel age.
Readers might find this, by Alan Kendall at Cliscep three years ago to be of interest:
Just for the sake of honesty, I defy anybody to precisely define what they mean by the “temperature” of the “Summer of 2023” and give an answer accurate to within 1ºC. I’m not convinced what it would really mean, if they could.
So, how about the “Summer temperature of 2000 years ago”. Or of 500 years ago, for that matter. Accuracy of =/- 5ºC? Highly doubtful. None of the “proxies”, (let alone the treemometers) have that kind of either accuracy, or precision.
So far as I am concerned, “Professor Ulf Büntgen, from Cambridge’s Department of Geography.” has proved conclusively that he is a total charlatan.
You could define it but it would be meaningless. Averaging max-min is simply wrong – as my day in SW France today showed. The high was very pleasant but either side of it we had periods of cold, wet, windy weather. The “temperature” today was nothing like a day that reached that high but didn’t have the cold periods either side. What is bring calculated is not a measure of reality.
And in Burgundy the “ice saints” are living well up to their reputation this year.* Cold wind, constant drizzle, and nothing above 15°. The coldest and wettest mid-May for at least 10 years.
*The ice saints are those whose feast days fall around May 13-16. It is traditionally a cold spell, just as in the UK Saint Luke’s Summer is traditionally a warm spell around October 18.
Does anyone here read the Guardian? Thats the place if you love being scared witless by climate alarmist news!
Or the BBC …
Auto
Is this why the 2023 Ashes was such a cold, miserable washout?
John Robson (CDN) does a video on tree rings 19th April 24
nowhere near as good as 76.
Ah but, yes but, no but. The summer of 1976 was principally the UK and may not have been enjoyed by the whole of the northern hemisphere. That said, that is why God tilted the earth in relation to the sun and created seasons for the earth at the time of creation. It used to be said by astronomers and cosmologists that earth was the only ‘Goldilocks Planet’ that they know of and that is why life has flourished on earth.
You sure a god did that?
Laughable!
How many brain cells does one need to work out that 2.2° above the average of the last 2,000 years does not mean that 2023 was the hottest year in that time?
If this is the intellectual standard of 21st century science graduates then the time has come to close the science faculties and redirect the money into something useful.
And 1.5° above “pre-industrial” times (ie the tail end of the Little Ice Age by the activists’ definition) is something to be thankful for, not something to be feared.
It looks as if the day of Maximum Desperation in the Computer Modelling Community is fast approaching. The time has come to urge them on to greater idiocy and hasten the day when even Greta Thunberg et al will be forced to accept they have been force-fed bullcrap for the last quarter-century and more. One can only hope the retribution will be swift and sufficiently severe to discourage similar inanities. Regrettably history is not on our side in that regard.
Still, during RWP and MWP, it was possible to wear thin clothes all year round in the Mediterranean region. Since LIA, forget it …
So… until today, it was hotter 2 000 years ago, so what changed the climate to make it cooler?
And… haven’t we been told the ‘tipping point’ when atmospheric CO2 starts to drive global warming is 350ppm… which was not passed until the 1990s, so how could CO2 pumped out prior to that have been heating things up.
It’s all drivel.
I once asked a climate catastrophist by what miracle tree rings measured temperature when it suited one author but rainfall when it suited another.
Anyhoo “Professor Ulf Büntgen, from Cambridge’s Department of Geography“
Long ago I attended departmental seminars there. They were far superior to Cambridge’s usual social standard – instead of a cup of tea we were given a glass of wine. The intellectual standard, though, was not too impressive.
Oh look, a Hokey Schtick!
How Twentieth Century!
I really don’t see anything “dramatic” in that graph of temperature. Until around 2000, it looks perfectly normal – indeed it looks virtually identical to the period after 600 or around 1000. I’m not sure what the source of the data for the last 25 years or so is, but it doesn’t look like UAH satellite data?
The starting point for any environmental comparison of temperatures should be the declared accuracy of the various measured or calculated temperatures.
For general meteorological applications in the UK in 2024: plus or minus five degrees C. For 2000 years ago? It will be a guess.
I loved the glorious summers of the early 1950s in Rhyl when the open air sea water swimming pool temperatures reached 72 deg F.
Let me see if I’ve got this straight:
Healthy forests with strong tree growth are a bellwether of a flourishing ecosystem;
Tree ring widths demonstrate the vigour of trees and hence forests;
The cause of wider tree rings is an increase in atmospheric temperature;
These temperatures can be mapped over millennia and the periods of highest temperatures known;
These periods coincide with some of the periods of successful human development (some beneficial, some malign, but supported by the improvement in climate and, presumably, food surpluses);
The temperature is now increasing to around the levels associated with that flourishing ecosystem;
Conclusion: this is bad for present-day humanity and the planet generally and we must revert to historically lower temperatures as a matter of great urgency and at huge cost.
I just don’t see why the mass hysteria that promotes this view has gained such a hold on the minds of apparently learned and intelligent individuals.
Temperature recording comes to mind,I believe over half the recording sites in the UK have junk status?