Klimatförändringar minskar syrenivåerna i världens floder

18 maj 2026

Rapporterad av AI

Floder över hela världen förlorar stadigt löst syre, där klimatförändringar identifieras som den främsta drivkraften i en omfattande ny studie. Nästan 80 procent av de analyserade flodsystemen har uppvisat minskningar under fyra decennier, där tropiska regioner har drabbats hårdast.

Forskare undersökte observationer från 21 439 flodsträckor insamlade mellan 1985 och 2023. De fastställde att syrenivåerna sjönk med en genomsnittlig takt på 0,045 milligram per liter per decennium, där 78,8 procent av floderna påverkades av syrebrist. Studien leddes av professor Kun Shi vid Nanjing Institute of Geography and Limnology vid den kinesiska vetenskapsakademin, med dr Qi Guan som huvudförfattare och bidrag från Tongji-universitetet.

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