Arktiska skogsbränder frigör kol som lagrats i tusentals år

13 maj 2026

Rapporterad av AI

Skogsbränder som rasar över arktiska och boreala regioner antänder gammalt kol i marken, vilket frigör betydligt mer koldioxid än vad klimatmodeller har antagit. En ny studie av borrkärnor från marken visar att vissa bränder förbränner organiskt material som är upp till 5 000 år gammalt.

Meri Ruppel vid Meteorologiska institutet i Finland ledde forskningen. Hennes team samlade in borrkärnor från brandplatser och fann att markvegetation som brinner ofta utlöser långsammare pyrande i djupare, äldre lager. Denna process frigör både koldioxid och svart kol, som absorberar solljus och påskyndar avsmältningen när det landar på is eller snö.

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