A recent study published in the journal Nature reveals alarming findings about the summer of 2023, asserting it as the hottest in the Northern Hemisphere in over 2,000 years.
A new study found that the 2023 summer was the hottest in the Northern Hemisphere in more than 2,000 yearsA study in the journal Nature used a well-established method and record of more than 10,000 tree rings to calculate summertime temperatures for each year since the year 1. No year came even close to last summer's high heat, said lead author Jan Esper, a climate geographer at the Gutenberg Research College in Germany.Before 2023, the hottest year was the year 246, Esper said.
RELATED: USDA updates its 2024 Plant Hardiness Map: Find out what planting zone you live inScientists look at the rings of annual tree growth and "we can match them almost like a puzzle back in time so we can assign annual dates to every ring," Torbenson said.Esper said his new study only uses tree data because it is precise enough to give summer-by-summer temperature estimates, which can't be done with corals, ice cores and other proxies. Tree rings are higher resolution, he said.
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