A Most Important video about CLIMATE CHANGE. (04:09)

Boundless Energy
Published on May 7, 2023
Ivor Cummins posted a video on Twitter about ice core drilling in Greenland.
"Listen carefully. This is the most important video on climate change you'll ever see, and it's only four minutes long," he wrote. "Watch it and judge for yourself. "

In the clip, glaciologist Jørgen Peder Steffensen shows an ice core from the Viking Age. It fell during the Medieval Warm Period, when it was on average 1.5 degrees warmer than today.
Ice cores contain important information about the Earth's climate. Using the ice cores, which are a total of three kilometers long, scientists can look 120,000 years into the past, so to speak.
Steffensen was able to determine the average temperature of the last 10,000 years to within a thousandth of a degree. What does it turn out to be? Four thousand years ago, it was on average 2.5 degrees warmer than today.
Between 4000 and 2000 years ago, the average temperature in Greenland dropped 2.5 degrees. Then the temperature rose slightly during the Medieval Warm Period. Then the temperature dropped again, only to rise again around 1875, about the time meteorological observations began.

The same observations were made elsewhere in the Northern Hemisphere.

It will be very difficult to prove that the temperature increase in the 20th century was caused by humans or is the result of a natural fluctuation, Steffensen emphasized. "After all, we started the measurements at the coldest point in the last 10,000 years."

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— Ivor Cummins (@FatEmperor) May 4, 2023