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Science
Alfonso Mucci, Professeur Émérite en géochimie et océanographie, McGill University

Why the St. Lawrence estuary is running out of breath

The Estuary and Gulf of St. Lawrence is one of, if not the largest estuarine system on Earth. It plays an intrinsic role in the history of Canada and is the cradle of Quebec's economy, and its identity. (Gwénaëlle Chaillou), Author provided

There’s no sign of it on the surface, but the water at the bottom of the estuary of the Lower St. Lawrence River is running out of breath. There is less and less dissolved oxygen in this deep water, and this deoxygenation cannot be fixed.

Our research focuses on a range of marine geochemistry projects, including the causes and consequences of low oxygen, called hypoxia, in the deep waters of the Gulf of St. Lawrence and of the estuary.

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