Southern Ocean deep mixing band emerges from a competition between winter buoyancy loss and upper stratification strength


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Submitted by rcaneill

March 5, 2024, 9:32 a.m.

Southern Ocean deep mixing band emerges from a competition between winter buoyancy loss and upper stratification strength

Romain Caneill, Fabien Roquet, and Jonas Nycander
Caneill, R., Roquet, F., and Nycander, J.: Southern Ocean deep mixing band emerges from a competition between winter buoyancy loss and upper stratification strength, EGUsphere [preprint], https://doi.org/10.5194/egusphere-2023-2404, 2023.
DOI:  10.5194/egusphere-2023-2404        


  Mean reproducibility score:   3.3/10   |   Number of reviews:   3

Brief Description
In winter, heat loss increases density at the surface of the Southern Ocean. This increase of density creates a mixed layer deeper than 250m only in a narrow deep mixing band (DMB) located around 50°S. We found that north of the DMB, the stratification is too strong to be eroded, so mixed layers are shallower. The density of cold water is almost not impacted by temperature changes. Thus, heat loss does not increase significantly the density south of the DMB, so no deep mixed layers are produced.

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