Nickel concentrations vary over the surface layer of the worlds’ oceans. Nickel concentrations correlate with nutrient concentrations because it can be up taken by photosynthesizing organisms, such as diatoms. Nickel is then remineralized at depth from biogenic material. However, there is regional variability. In general, dissolved Nickel concentrations are rarely below 1.5-2.0 nmol/kg of seawater, usually in nutrient-deplete areas since it follows a similar profile. For example, there are generally lower concentrations in the northern hemisphere of the Atlantic Ocean, with the lowest Nickel concentration being 1.7 nanomol (nmol)/ kg of seawater. This could be related to greater Nickel uptake by nitrogen fixers and a high influence of aeolian iron concentrations. Photosynthesizing organisms’ uptake the Nickel with an uptake in iron because iron stimulates nutrient in photosynthesizing organisms. Furthermore, in nutrient-rich eastern boundary currents, Nickel concentrations average 3.5 nmol/kg of seawater. North Atlantic surface waters (Equator to 40⁰) from 0-100 meters range from 2.06 to 2.52 nmol/kg of seawater. In the North Atlantic, Nickel concentrations increase in concentration with depth from 0-500m range at 3.13 to 3.61 nmol/kg of sea water.