Study: Summer ’23 Was Hottest in 2,000 Years

Reuters

17:55 JST, May 22, 2024

LONDON (Reuters) — The intense northern hemisphere summer heat that drove wildfires across the Mediterranean, buckled roads in Texas and strained power grids in China last year made it not just the warmest summer on record — but the warmest in some 2,000 years, new research suggests.

The stark finding comes from one of two new studies released on May 14, as both global temperatures and climate-warming emissions continue to climb.

Scientists had quickly declared last year’s June to August period as the warmest since record-keeping began in the 1940s.

New work published in the journal Nature suggests the 2023 heat eclipsed temperatures over a far longer timeline — a finding established by looking at meteorological records dating to the mid-1800s and temperature data based on the analysis of tree rings across nine northern sites.

“When you look at the long sweep of history, you can see just how dramatic recent global warming is,” said study coauthor Jan Esper, a climate scientist at Johannes Gutenberg University in Germany.