Late 20th century was warmest in 1,400 years

Apr 21, 2013
A Belarus man cools down in a fountain during a hot summer day in Minsk on July 11, 2010. Earth was cooling until the end of the 19th century and a hundred years later, the planet's surface was on average warmer than at any time in the previous 1,400 years, according to climate records presented on Sunday.

Earth was cooling until the end of the 19th century and a hundred years later, the planet's surface was on average warmer than at any time in the previous 1,400 years, according to climate records presented on Sunday.

In a study spanning two millennia published in Nature Geoscience, scientists said a "long-term cooling trend" around the world swung into reverse in the late 19th century.

In the 20th century, the average was 0.4 degrees Celsius (0.7 degrees Fahrenheit) higher than that of the previous 500 years, with only Antarctica bucking the trend.

From 1971-2000, the planet was warmer than at any other time in nearly 1,400 years.

This measure is a global average, and some regions did experience warmer periods than that—but only for a time. Europe, for instance, was probably warmer in the first century AD than at the end of the 20th century.

The investigation is the first attempt to reconstruct temperatures over the last 2,000 years for individual continents.

It seeks to shed light on a fiercely-contested aspect in the global-warming debate.

have claimed bouts of cooling or warming before the —including two episodes in Europe called the Medieval Warm Period and the Little Ice Age—are proof that are natural, not man-made.

The new study does not wade into the debate about , but points to two planetary trends.

During Europe's 2003 heat wave, July temperatures in France were as much as 18 degrees F hotter than in 2001. Credit: NASA

The first is a clear, prolonged period of cooling. It may have been caused by a combination of factors, including an increase in , with stratospheric ashes reflecting the sunlight, or a decrease in or tiny changes in Earth's orbit, both of which would diminish sunlight falling on the planet.

The cooling—between 0.1-0.3 C (0.2-0.6 F) per thousand years, depending on the region—went into reverse towards the end of the 19th century, and was followed by an intensifying period of warming in the 20th, the paper said.

Beneath this global trend over 2,000 years were episodes of continental cooling or warming, some of which were quite long.

And some continents lagged the overall planetary trend, but with the exception of Antarctica, all followed it.

"Distinctive periods, such as the or the stand out, but do not show a globally uniform pattern on multi-decadal time scales," said Heinz Wanner of the University of Bern in Switzerland, one of 78 researchers from 24 countries who took part in the project.

"There are things that are common to all the regions of the planet—long-term cooling, until the 19th century, followed by warming on all continents, except for Antarctica, where it is less clear, but also strong variations from one region to another," Hugues Goosse, a climatologist at Belgium's Catholic University of Leuven, told AFP.

Previous research into climate change has pointed to a warming spurt in the 20th century and attributed it to the rise of heat-trapping carbon gases emitted by burning coal, oil and gas.

The warming trend shifted up a gear in the middle of the 1970s, in line with record-breaking levels of carbon dioxide (CO2), according to this past research.

2012 saw the 36th straight year that global temperatures were above average since 1880, when scientifically acceptable records were first kept, and was the ninth or 10th warmest on record, US scientists said in January.

The temperature reconstruction published on Sunday was coordinated by a scientific initiative called the Past Global Changes (PAGES) 2K Network.

It brings together weather data as well as telltales of temperature variation from tree rings, pollen, corals, lake and marine sediments, ice cores and stalagmites garnered at 511 locations across seven continental-scale regions.

for Africa, though, were sparse, the researchers cautioned.

Explore further: NASA sees Tropical Storm Lowell's tough south side

More information: Paper: DOI: 10.1038/ngeo1797

add to favorites email to friend print save as pdf

Related Stories

NASA finds 2011 ninth-warmest year on record

Jan 19, 2012

The global average surface temperature in 2011 was the ninth warmest since 1880, according to NASA scientists. The finding continues a trend in which nine of the 10 warmest years in the modern meteorological ...

Arctic at warmest levels in 2,000 years or more

Sep 03, 2009

Arctic temperatures in the 1990s reached their warmest level of any decade in at least 2,000 years, new research indicates. The study, which incorporates geologic records and computer simulations, provides ...

Recommended for you

NASA sees Tropical Storm Lowell's tough south side

13 hours ago

The south side of Tropical Storm Lowell appears to be its toughest side. That is, the side with the strongest thunderstorms, according to satellite imagery from NOAA's GOES-14 and NASA-NOAA's Suomi NPP satellites.

User comments : 49

Adjust slider to filter visible comments by rank

Display comments: newest first

VENDItardE
1.8 / 5 (33) Apr 21, 2013
already been shredded by the actual scientists.......more alarmist nonsense
LightCatcher
3.5 / 5 (25) Apr 21, 2013
The evidence keeps stacking up that we are responsible for this. We have been warned. And so it is not a surprise that weird weather keeps happening and it gets hotter. It will continue and don't you know it will.
MR166
1.7 / 5 (22) Apr 21, 2013
This article is a day late and a dollar short. The governments are already working on the proper taxes and regulations needed to protect you from the coming AGCooling.
MR166
1.7 / 5 (23) Apr 21, 2013
I hear that Al Gore has already started a fund to buy earmuffs for the polar bears.
Maggnus
3.5 / 5 (21) Apr 22, 2013
already been shredded by the actual scientists.......more alarmist nonsense


Lol! Please keep posting, you always manage to make such an ass of yourself! It's hilarious!

NotParker
1.8 / 5 (24) Apr 22, 2013
Tree rings. One Magical tree in Yamal. What a joke.
VendicarE
3.6 / 5 (20) Apr 22, 2013
2012 saw the 36th straight year that global temperatures were above average since 1880, when scientifically acceptable records were first kept, and was the ninth or 10th warmest on record, US scientists said in January.
Neinsense99
3 / 5 (16) Apr 22, 2013
I hear that Al Gore has already started a fund to buy earmuffs for the polar bears.


You already have something much more effective at protecting your ears from what you don't want.
Sean_W
2.8 / 5 (19) Apr 22, 2013
Medieval industrialists and oil barons almost destroyed us once. Now they are back to finish the job.
antigoracle
2.2 / 5 (27) Apr 22, 2013
What!!! No Hockey Stick!!! I'm so disappointed.
2012 saw the 36th straight year that global temperatures were above average since 1880, when scientifically acceptable records were first kept, and was the ninth or 10th warmest on record

Yes, 2012 was the 9th or 10th warmest, because the globe has been cooling since 2000, despite increasing CO2.
ubavontuba
1.8 / 5 (20) Apr 22, 2013
Medieval industrialists and oil barons almost destroyed us once. Now they are back to finish the job.
LOL. Good one!

gregor1
1.3 / 5 (12) Apr 22, 2013
Apparently they used the seriously bogus Gergis reconstruction to represent Australasia. Garbage in garbage out I'm afraid.
gregor1
1.3 / 5 (12) Apr 22, 2013
Interesting too that they don't name the paper in this press release. This is typical spin doctoring. The paper's title is "Continental-scale temperature variability during the past two millennia"
So this piece could have been titled.
"Temperature today the same as 1400 years ago. Present warming not unprecedented."
jimsecor
1.3 / 5 (13) Apr 22, 2013
Let us all remember, too, that CO2, the major greenhouse gas is a by-product of digestion. I'm surprised the humanocentric global warming armageddonists are not pushing butt plugs.
runrig
4.3 / 5 (12) Apr 23, 2013
Tree rings. One Magical tree in Yamal. What a joke.


http://www.guardi...withheld

"Even McIntyre denounces the more vocal sceptics with their conspiracy theories. In an apparent response to a challenge from the climate scientists' website RealClimate, he wrote to the American Spectator last October: "While there is much to criticise in the handling of this [Yamal] data, the results do not in any way show that AGW [anthropogenic global warming] is a 'fraud', nor that this particular study was a 'fraud'. There are many serious scientists who are honestly concerned about AGW and your commentary … is unfair to them." Sadly, when checked last week, there was no sign of this comment on the magazine website, though the magazine had found room for another feature on "The great hoax" of climate change."
antigoracle
1 / 5 (13) Apr 23, 2013
And, in other non-AGW Alarmist Zealots news, Portugal, Spain, Italy, the UK and all other countries, enjoyed a very pleasant summer.
Apparently, all the CO2 in the world sits over France come summer.
runrig
5 / 5 (9) Apr 23, 2013
And, in other non-AGW Alarmist Zealots news, Portugal, Spain, Italy, the UK and all other countries, enjoyed a very pleasant summer.
Apparently, all the CO2 in the world sits over France come summer.


Yes, it did in 2003. In 2010 it was over Russia. Last year it was sitting over the US. And this last NH winter over OZ. Mind you there was a depletion of CO2 over Europe this winter.
deepsand
3.8 / 5 (17) Apr 24, 2013
What!!! No Hockey Stick!!! I'm so disappointed.

Lack of knowledge and understanding will do that to you.
antigoracle
1 / 5 (13) Apr 24, 2013
And, in other non-AGW Alarmist Zealots news, Portugal, Spain, Italy, the UK and all other countries, enjoyed a very pleasant summer.
Apparently, all the CO2 in the world sits over France come summer.


Yes, it did in 2003. In 2010 it was over Russia. Last year it was sitting over the US. And this last NH winter over OZ. Mind you there was a depletion of CO2 over Europe this winter.

The CO2 over France must be from all the champagne they pop, to celebrate their hot summer, after a terrible global warming induced winter.
antigoracle
1 / 5 (11) Apr 24, 2013
What!!! No Hockey Stick!!! I'm so disappointed.

Lack of knowledge and understanding will do that to you.

Spoken from first hand experience.
runrig
5 / 5 (9) Apr 24, 2013
Apparently, all the CO2 in the world sits over France come summer.


Yes, it did in 2003. In 2010 it was over Russia. Last year it was sitting over the US. And this last NH winter over OZ. Mind you there was a depletion of CO2 over Europe this winter.

The CO2 over France must be from all the champagne they pop, to celebrate their hot summer, after a terrible global warming induced winter.


I'd not considered that, but you could be right. Not sure about the GW induced winter, though it was actually just Feb and Mar that were colder than ave ...http://data.giss....mp/maps/

Further study needed but Low solar perhaps along with set up of early winter global circulation. Strange as it may seem but air masses do not like to mix. Change the dynamic and they will move in different ways. GW does not mean the weather proceeds as normal, just raising the temperature a few tenths of a deg each decade ( on ave ). Profound changes can/do occur in circulation.
antigoracle
1 / 5 (13) Apr 24, 2013
Further study needed

Agreed. Now where can I get a grant to pursue my hypothesis?
deepsand
3.6 / 5 (17) Apr 24, 2013
What!!! No Hockey Stick!!! I'm so disappointed.

Lack of knowledge and understanding will do that to you.

Spoken from first hand experience.

Indeed it is. I have very much first-hand experience observing the antics of the intellectually handicapped such as you and your ilk.
antigoracle
1 / 5 (15) Apr 25, 2013
What!!! No Hockey Stick!!! I'm so disappointed.

Lack of knowledge and understanding will do that to you.

Spoken from first hand experience.

Indeed it is. I have very much first-hand experience observing the antics of the intellectually handicapped such as you and your ilk.

Wow!! You are actually able to surface, from the depths of your cesspool of ignorance, long enough to observe. Your prolonged existence in darkness and resultant atrophied brain, has obviously hampered your judgement. Be warned that exposure to the atmosphere, especially with global warming, can be detrimental to AGW Alarmist Turds, such as yourself. So please, do yourself a solid, and recede back into your ignorance, before you see the light.
deepsand
3.4 / 5 (18) Apr 26, 2013
Time to take your meds AO, and toddle off to sleep.
NotParker
1 / 5 (13) Apr 26, 2013
A recent paper's data suggest the 1870s were the warmest period in the last 300 years.

See Fig. 2.

http://climateaud...y-stick/

Of course the AGW cult leaders were not honest and hid some data from their readers.

Fascinating article.
deepsand
3.6 / 5 (17) Apr 26, 2013
NP either missed or chose to ignore the fact that his cited source is speaking of matters re. Antarctica.
ArtflDgr
1 / 5 (10) May 01, 2013
why pick 1400... not 2000... not some other number?

heck, can it be like the naacp starting the lynching record the year AFTER the southern dems murdered thousans of blacks in the parishes, and caused hayes tilden election problems? if they started a year or few before, they woudl have to include a number larger than all the later years combined.

such honesty... now, why pick such a weird odd number? what happened 1410 years ago?
deepsand
3.8 / 5 (16) May 01, 2013
why pick 1400... not 2000... not some other number?

heck, can it be like the naacp starting the lynching record the year AFTER the southern dems murdered thousans of blacks in the parishes, and caused hayes tilden election problems? if they started a year or few before, they woudl have to include a number larger than all the later years combined.

such honesty... now, why pick such a weird odd number? what happened 1410 years ago?

If you need to ask the question then you obviously either haven't studied the subject or do not comprehend.
antigoracle
1 / 5 (14) May 02, 2013
There is no doubt the AGW Alarmist Zealots are dumb, but to be blind also takes stupidity to a new level. The picture in the article clearly shows everywhere, but France, is normal or below normal, yet the Cult preach this as man-made global warming.
deepsand
3.8 / 5 (16) May 02, 2013
There is no doubt the AGW Alarmist Zealots are dumb, but to be blind also takes stupidity to a new level. The picture in the article clearly shows everywhere, but France, is normal or below normal, yet the Cult preach this as man-made global warming.

TROLL.
antigoracle
1 / 5 (13) May 03, 2013
There is no doubt the AGW Alarmist Zealots are dumb, but to be blind also takes stupidity to a new level. The picture in the article clearly shows everywhere, but France, is normal or below normal, yet the Cult preach this as man-made global warming.

TROLL.

Apparently this single neuron AGW Alarmist Turd does not know where France is.
https://maps.goog...0Q8gEwAA
Maggnus
4.4 / 5 (7) May 03, 2013
Apparently this single neuron AGW Alarmist Turd does not know where France is.


No, silly horse-trough water, he can see the map shows warming in France, Northern and Southern UK, Northern Ireland, Northern Italy, parts of Germany, Southern Poland, Switzerland, Northern and Southern Spain, Northern Portugal, the Balkans, even in Sicily and Elba. You should take some time to learn how to read a map, againstseeing. Or are you against reading maps too?
antigoracle
1 / 5 (12) May 03, 2013
warming in France, Northern and Southern UK, Northern Ireland, Northern Italy, parts of Germany, Southern Poland, Switzerland, Northern and Southern Spain, Northern Portugal, the Balkans, even in Sicily and Elba.
-- magganus
The globe according to the AGW Alarmist.
Maggnus
4.4 / 5 (7) May 03, 2013
magganus
The globe according to the AGW Alarmist.


No, the map of Europe shown in the article above, which you claimed was France. You linked to a different map, remember? Where you told deepsand that it was France? Everywhere normal but France, you said. Added a link to a map that showed Europe, then said deepsand should learn where France is. Which you, apparently, don't know doesn't include Switzerland, Germany, Italy, Poland or Luxemburg.

Shake your head againstseeing, your brain is stuck in neutral.
deepsand
3.4 / 5 (15) May 04, 2013
There is no doubt the AGW Alarmist Zealots are dumb, but to be blind also takes stupidity to a new level. The picture in the article clearly shows everywhere, but France, is normal or below normal, yet the Cult preach this as man-made global warming.

TROLL.

Apparently this single neuron AGW Alarmist Turd does not know where France is.
https://maps.goog...0Q8gEwAA

TROLL TRASH.
deepsand
3.4 / 5 (15) May 04, 2013
warming in France, Northern and Southern UK, Northern Ireland, Northern Italy, parts of Germany, Southern Poland, Switzerland, Northern and Southern Spain, Northern Portugal, the Balkans, even in Sicily and Elba.
-- magganus
The globe according to the AGW Alarmist.

Another steaming heap of TROLL TRASH.
antigoracle
1 / 5 (13) May 04, 2013
magganus
The globe according to the AGW Alarmist.


No, the map of Europe shown in the article above, which you claimed was France. You linked to a different map, remember? Where you told deepsand that it was France? Everywhere normal but France, you said. Added a link to a map that showed Europe, then said deepsand should learn where France is. Which you, apparently, don't know doesn't include Switzerland, Germany, Italy, Poland or Luxemburg.

Shake your head againstseeing, your brain is stuck in neutral.

I knew you were dense, but this is beyond ridiculous. The map in the article does not show show country boundaries, hence the link I provided, which also shows France in relation to the other countries in the image of the article.
Maggnus
4.1 / 5 (9) May 04, 2013
Look again dumdum, lines of the countries are clearly shown. Eyes are stuck too againstseeing, really need to shake your head. Dumber than the average denier!
deepsand
3.4 / 5 (15) May 04, 2013
magganus
The globe according to the AGW Alarmist.


No, the map of Europe shown in the article above, which you claimed was France. You linked to a different map, remember? Where you told deepsand that it was France? Everywhere normal but France, you said. Added a link to a map that showed Europe, then said deepsand should learn where France is. Which you, apparently, don't know doesn't include Switzerland, Germany, Italy, Poland or Luxemburg.

Shake your head againstseeing, your brain is stuck in neutral.

I knew you were dense, but this is beyond ridiculous. The map in the article does not show show country boundaries, hence the link I provided, which also shows France in relation to the other countries in the image of the article.

Another steaming heap of TROLL DUNG.
antigoracle
1 / 5 (13) May 04, 2013

Another steaming heap of TROLL DUNG.
-- deepsandTurd aka FecalMatter
FecalMatter would certainly be an expert in DUNG.
deepsand
3.1 / 5 (15) May 04, 2013

Another steaming heap of TROLL DUNG.
-- deepsandTurd aka FecalMatter
FecalMatter would certainly be an expert in DUNG.

PUERILE TROLL.
antigoracle
1 / 5 (12) May 05, 2013

Another steaming heap of TROLL DUNG.
-- deepsandTurd aka FecalMatter
FecalMatter would certainly be an expert in DUNG.

PUERILE TROLL.

REPUGNANT TURD
deepsand
3.3 / 5 (14) May 05, 2013
Well, that was certainly mature and well reasoned. :rolleyes:
Neinsense99
3 / 5 (10) May 30, 2013

Another steaming heap of TROLL DUNG.
-- deepsandTurd aka FecalMatter
FecalMatter would certainly be an expert in DUNG.

PUERILE TROLL.

REPUGNANT TURD

Your name in Mock Chinese is Sum Dung Flung.
ryggesogn2
1 / 5 (10) May 30, 2013
If true, what caused the warming 1400 years ago?
Neinsense99
3.2 / 5 (11) May 30, 2013
If true, what caused the warming 1400 years ago?

Play change the subject much?
ryggesogn2
1 / 5 (10) May 30, 2013
If true, what caused the warming 1400 years ago?

Play change the subject much?

The subject is AGW hype and if the AGWites don't know why climate was warmer 1400 years ago how can they predict 100 years into the future?
deepsand
3.5 / 5 (13) May 30, 2013
If true, what caused the warming 1400 years ago?

Play change the subject much?

The subject is AGW hype and if the AGWites don't know why climate was warmer 1400 years ago how can they predict 100 years into the future?

Because causes of present and future effects are not constrained by those of the past.

Anyone with a wee bit of common sense knows that.