Primary production of carbon from three subfractions at bottle station SEPT-1999-K5

Photosynthetic productivity was measured according to the in situ 14C method. Fractionation was carried out by filtration through polycarbonate Millipore filters having porosities 0.2 (total stock), 1.2 and 3.0 µm. (Steemann-Nielsen, E., 1952. The use of radioactive carbon (14C) for measuring organic production in the sea. Journal du Conseil Permanent International pour l' Exploration de la Mer 18, 117-140.)