Tree Rings Reveal 2023 as Hottest Summer in Northern Hemisphere in 2,000 Years

In a groundbreaking study, researchers have discovered that the summer of 2023 was the hottest in the Northern Hemisphere over the past two millennia. By analyzing tree ring data, scientists from the University of Cambridge and Johannes Gutenberg University Mainz found that 2023 exceeded even the most extreme natural climate variations by half a degree Celsius.

“When you look at the long sweep of history, you can see just how dramatic recent global warming is,” said co-author Professor Ulf Büntgen from Cambridge.