Hypoxia in the Lower St. Lawrence Estuary: How physics controls spatial patterns.

Lefort, Stelly; Gratton, Yves; Mucci, Alfonso; Dadou, Isabelle et Gilbert, Denis (2012). Hypoxia in the Lower St. Lawrence Estuary: How physics controls spatial patterns. Journal of Geophysical Research: Oceans , vol. 117 , nº C7. C07018. DOI: 10.1029/2011JC007751.

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Résumé

A laterally integrated advection‐diffusion two‐dimensional model was implemented to simulate the spatial distribution of dissolved oxygen and the development of hypoxic conditions in the deep waters of the Laurentian Channel (Estuary and Gulf of St. Lawrence, Eastern Canada). Our simulations reveal that the horizontal distribution of dissolved oxygen in the bottom waters of the Laurentian Channel is determined by a combination of physical and biogeochemical processes, whereas its vertical distribution is governed by the deep water circulation. This result strongly suggests that the physics of the system and the source water properties are mostly responsible for the generation of a mid‐water column oxygen minimum and the oxygen distribution pattern in the deep water column.

Type de document:	Article
Mots-clés libres:	Estuary and Gulf of St. Lawrence; advection; biocheochemical processes; diffusion; hypoxia; physical processes
Centre:	Centre Eau Terre Environnement
Date de dépôt:	29 nov. 2019 14:32
Dernière modification:	29 nov. 2019 14:32
URI:	https://espace.inrs.ca/id/eprint/9543

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