Permanently Open Ocean Zone

The biogeochemical provinces of the Southern Ocean, as defined by Treguer andjacques (1992), are the Polar Front Zone, the Permanently Open Ocean Zone, the Marginal and Seasonal Ice Zones, and the Coastal and Continental Shelf Zone (Fig. 12.1). Note that the Marginal Ice Zone is a seaward subzone of the Seasonal Ice Zone delimited by the recent melting of ice, a seasonally migrating band of recendy exposed surface waters within the Seasonal Ice Zone (Moore et ah, 2000). The... 

Figure 12.1 The sectors of the Southern Ocean and the four biogeochemical provinces the Polar Front Zone, the Permanently Open Ocean Zone, the Marginal and Seasonal Ice Zones, and the Coastal and Continental Shelf Zones.

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