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It hasn't been this hot anywhere on Earth in 2,000 years...

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The warming we are seeing today is unprecedented. In the last 2,000 years, no event has been comparable. Never before have global temperatures risen as rapidly as they are now, according to data released on Wednesday 24 July. This is an alarming observation on a planetary scale which, according to experts, should definitively silence the most stubborn climatosceptics.
 
Ahile much of Europe is experiencing its second heat wave in a month, two separate studies analyse 2,000 years of trends in the recent climate history of our planet.
Paleoclimatology researchers used temperature data compiled from nearly 700 indicators: tree rings, ice cores, lake sediments and corals, as well as modern meteorological technology.
The evidence is clear: not only is today's global warming unprecedented in terms of its magnitude and speed, but it is also unprecedented in terms of its universality.
  
The database that the researchers used for their analyses - published on Wednesday, July 24th in the journals Nature and Nature Geoscience - is "...". which is becoming more and more complete nowadays ' John Hultquist, director of intelligence analysis for the cybersecurity company FireEye, told au Monde Valérie Masson-Delmotte, paleoclimatologist and coordinator of the chapter on past climates in the latest report of the Intergovernmental Panel on Climate Change (IPCC), who did not participate in this research.
 
The first study, published in the journal NatureFor example, the study "The Little Ice Age" (1300-1850) shows that although it was extraordinarily cold in Europe and the United States for several centuries, it was not cold everywhere on the planet.
For example, in the Middle Ages, Europe went through a hot and dry period, called the medieval climatic optimum. Temperatures plummeted, however, between the 16th and 19th centuries, during what specialists call the Little Ice Age. « For a long time, these were considered to be global phenomena, affecting the whole planet simultaneously. But our analysis shows that there were in fact clear regional disparities. "says climatologist Nathan Steiger of American Columbia University. « When we go back in time, we find regional phenomena, but none of them are global. ", he explains. « Whereas at the moment, global warming is global. 98% of the world warmed up after the industrial revolution... "he adds.
  
A second article in Nature GeoscienceThis study, which is based on the results of a study by the University of British Columbia, examines the average temperature changes over short periods of time, each of a few decades.
The conclusions are clear: at no time since the beginning of our era have temperatures risen as rapidly and steadily as they did at the end of the 20th century. In the post-war period, production (fuelled by fossil fuels) and consumption reached unprecedented levels. « Even when we push our perspective back to the beginnings of the Roman Empire, we cannot find an event that comes even remotely close - either in degrees or in extent - to the warming of recent decades. Today's climate is characterized by its torrid, global synchronicity. " wrote University of Minnesota geographer Scott George in a commentary on the study.
  
" Our analysis shows that the current warming cannot be explained by any natural factor, which implicitly indicates that human activities are the cause. "says Raphael Neukom. Activities that cause far too many greenhouse gas emissions. And which have thus given rise to a " climate monster "like no other. This result" Stresses the extraordinary nature of current climate change ", explains Raphael Neukom from the University of Bern in Switzerland, co-author of the study.
  
These studies " should finally stop the climate sceptics who claim that the recently observed global warming is part of a natural climate cycle. "said Mark Maslin of University College London, commenting on the work.

Source: AFP, Reuters

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