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Marine Oceanic Epipelagic Lower Layer (Water Column Layer)

Component: Layer

Unique Identifier: 622

Water Column Layer Marine Oceanic Epipelagic Lower Layer


Description
Definition Within the Epipelagic Layer, the region below the Epipelagic pycnocline if present (or below mid-depth [100 meters]). Photosynthesis can generally occur through this layer although diminishing with depth to the critical depth for phytoplankton, which represents the point where production and respiration are in balance and no net productivity occurs. The lower bound of the Epipelagic Lower Layer is the bottom of the Epipelagic Layer at 200 meters.