Scientists Used Clues Hidden Deep In The Trunks Of Ancient Trees To Find Out That Last Year Was The Hottest Summer In 2,000 Years

They found that in 2023, temperatures were 2.07 degrees Celsius warmer than the average temperatures from the pre-industrial period of 1850 to 1900.

They also used tree ring data from the Northern Hemisphere to compare the summer of 2023 to summers dating back to 1 C.E. During warmer periods, tree rings will grow wider.

Their analysis showed that in 2023, temperatures were 2.20 degrees Celsius warmer than the average from 1 C.E. to 1890.

When compared to the coldest summer on record, which occurred in 536 C.E., the summer of 2023 was a whole 3.93 degrees Celsius warmer.

The most recent El Niño episode has continued into 2024, so scientists expect its influence to extend into this summer as well, which may make 2024 break last year’s records.

The study’s authors say the main takeaway from their work is that greenhouse gas emissions need to be reduced significantly.

“The longer we wait, the more expensive it will be and the more difficult it will be to mitigate or even stop that process and reverse it,” Jan Esper, the study’s lead author and a professor at Johannes Gutenberg University in Germany, said.

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