Jørgen Peder Steffensen is a renowned professor who specializes in ice core research at the prestigious Niels Bohr Institute located at the University of Copenhagen, Denmark.
His expertise lies in utilizing ice core dating to retrieve significant information regarding climate history. His dedicated team has meticulously reconstructed the climate changes of the last 10,000 years and efficiently converted them into a graph for better understanding and analysis.
The video below discusses the Nordgrip project in Greenland where scientists under the lead of professor Steffensen extracted ice cores to provide data on the climate history of the Earth, with the cores containing climate information over the past 120,000 years. A graph is shown indicating that temperatures were on average 2.5 degrees warmer between 4,000 years ago and the Roman age than today.
Jørgen Peder Steffensen, who has behind him years of extensive research and hands-on experience and is an influential figure in the field of climate science, suggests that while data truly indicates an increase in global temperatures in the 20th century, it’s rationally impossible to prove that this increase was man-made and not a natural variation, simply because the meteorological data collection started at the coldest period in the last 10,000 years.