Forskare förklarar hur koldioxid kyler ner stratosfären

14 maj 2026

Rapporterad av AI

Forskare vid Columbia University har identifierat den exakta mekanismen bakom hur stigande koldioxidhalter kyler ner den övre atmosfären. Upptäckten förklarar årtionden av observerad avkylning i stratosfären samtidigt som jordytan värms upp. Studien har publicerats i tidskriften Nature Geoscience.

Stratosfären, det skikt som sträcker sig från cirka 11 till 50 kilometers höjd över jordytan, har kylts ner med ungefär 2 grader Celsius sedan mitten av 1980-talet. Denna avkylning är mer än tio gånger kraftigare än vad som hade förväntats utan mänskliga koldioxidutsläpp. Processen förutspåddes första gången på 1960-talet av klimatforskaren Syukuro Manabe.

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19 juni 2026 17:07

Forskare förklarar hur koldioxid kyler ner stratosfären

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