Posted on 12/12/2019 11:20:11 AM PST by Oldeconomybuyer
People who dismiss climate change often claim that the earth's warm-up is simply part of “natural climate variability.” A paper published in July in Nature puts that argument to rest. The authors show that warm and cold years were regularly interspersed during the past 2,000 years and that even the warmest and coldest periods were experienced only by isolated regions at a given time - never across the entire globe simultaneously.
For example, the so-called Little Ice Age occurred in the 1400s across the central Pacific Ocean, in the 1600s across northwestern Europe and in the mid-1800s in other places. The warm Medieval Climate Anomaly occurred in the Pacific in the 900s, in North America in the 1000s and in central South America in the 1200s.
But the current warm-up has taken place across 98 percent of the globe at the same time, from about 1900 through today. “It's completely different,” states lead researcher Raphael Neukom of the University of Bern in Switzerland.
(Excerpt) Read more at scientificamerican.com ...
Disagree with this single paper, go straight to jail.
/s
Poor Scientific American. Once they had some credibility. Not any more.
That a demonstrable false statement that indicates this whole "study" they are claiming is a lie.
The global effects of historic volcanic eruptions is a well documented real scientific fact that give the lie to this made up "study" being cited. https://www.scientificamerican.com/article/how-do-volcanoes-affect-w/
and the sun has nothing to do with it?
ok doomer
It’s unseasonably cold here on the gulf coast. Coldest in 45 years.
Oh, is debate over/consensus reached again? I have a science degree, not how I learned the scientific process worked.
Just like impeachment. some yard bird rat says something is true so it is true regardless the physical evidence.
Deer scientific America where do I go to get copies of the temperature readings from 2000 years ago. I much appreciate it if you could tell me. thank you.
The Goebbels Photo is always a smile maker!
Key word here is 'natural'. So how does the author of 'Nature' explain that warming and cooling is consistent with the Moon and other planets in our Solar System? Is mankind also causing warming of the Moon and other planets, or is it the Sun in conjunction with other forces at work in nature?
Former UN Lead Author: Global Warming Caused By ‘Natural Variations’ In Climate
Global temperature change observed over the last hundred years or so is well within the natural variability of the last 8,000 years, according to a new paper by a former Intergovernmental Panel On Climate Change (IPCC) lead author.
Dr. Philip Lloyd, a South Africa-based physicist and climate researcher, examined ice core-based temperature data going back 8,000 years to gain perspective on the magnitude of global temperature changes over the 20th Century.
What Lloyd found was that the standard deviation of the temperature over the last 8,000 years was about 0.98 degrees Celsius– higher than the 0.85 degrees climate scientists say the world has warmed over the last century.
“This suggests that while some portion of the temperature change observed in the 20th century was probably caused by greenhouse gases, there is a strong likelihood that the major portion was due to natural variations,” Lloyd wrote in his study.
The United Nations’ IPCC claims there’s been 0.85 degrees Celsius of warming since the late 1800s, and concludes that most of this warming is due to human activities– mainly, the burning of fossil fuels and changes in land use. The IPCC says that “more than half of the observed increase in global average surface temperature from 1951 to 2010” have been caused by human activity.
If Lloyd’s results hold, the IPCC may have to revise how much warming it attributes to mankind. In any case, the IPCC’s estimate of man-made and natural warming (0.85 degrees) is still below the standard deviation for the last 8,000, according to Lloyd’s results. This means that warming is not very significant within the context of the Earth’s recent climate history.
Okay DOOMERS/CLIMAGEDDONISTS.
What explains evidence of tropical climates in northern latitudes?
I am still waiting for the nuclear war they predicted would occur if Reagan deployed the Pershing missiles.
I must have slept through it.
Scientific American was once a good magazine. It has become 100% politically correct, and has lost its credibility.
That’s it. Put to rest. The science is settled. Everyone agrees. It’s a fact.
Yeah, no.
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