North Atlantic particulate nitrogen

Fig. 5. Total free sterols, particulate organic carbon, particulate organic nitrogen, chloro-phyil a, potential density (ae) and potential temperature (6) as a function of depth to 400 m for a section in the western North Atlantic Ocean (Gagosian and Nigrelli, 1979).

Packard, T.T. and Dortch, Q., 1975. Particulate protein-nitrogen in North Atlantic surface waters. Mar. Biol., 33 347—354. 

Figure 12 Nitrogen isotopic values of suspended particulate matter and sinking particles (as collected by sediment traps) in the subtropical North Atlantic Ocean near BATS (31° 50 N, 64° 10 W see Figure 6). The profiles of suspended PN show the representative depth gradient in <5 N, with lower iS N in the surface ocean than at depth. The <5 N of the sinking flux shows a decrease with depth, which has also been observed in other regions. Reprinted from Altabet MA, Deuser WG, Honjo S, and Stienen C (1991) Seasonal and depth-related changes in the source of sinking particles In the North Atlantic. Nature 354 136-139.

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