L'océan Arctique a franchi un point de non-retour avec la chute des niveaux de nitrate

28 mai 2026

Rapporté par l'IA

L'océan Arctique a franchi un point de non-retour vers 2009, selon une nouvelle étude montrant que la fonte de la banquise a considérablement réduit les niveaux de nitrate dans l'eau.

Des chercheurs de l'Université d'Édimbourg ont analysé plus de 20 ans de données provenant du détroit de Fram. Ils ont découvert que la baisse des nitrates a commencé alors que la banquise se retirait rapidement, exposant les eaux peu profondes à davantage de lumière solaire et accélérant un processus appelé dénitrification benthique, qui élimine ce nutriment de l'eau de mer.

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jeudi 16 juillet 2026 09h57

L'océan Arctique a franchi un point de non-retour avec la chute des niveaux de nitrate

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