The apparent iron solubility calculated from ambient temperature, pH and dissolved organic carbon in the Atlantic and Pacific oceans ...

Iron (Fe) is an important limiting nutrient in the marine environment constraining primary production across much of the ocean due to its sparse solubility in seawater. Iron availability regulates the magnitude and dynamics of ocean primary productivity, and is dependent on Fe solubility and speciat...

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Bibliographic Details
Main Authors: Zhu, Kechen, Achterberg, Eric Pieter, Bates, Nicolas R, Gerringa, Loes, Middag, Rob, Hopwood, Mark James, Gledhill, Martha
Format: Dataset
Language:English
Published: PANGAEA 2022
Subjects:
Biogeochemical Cycling
Iron Geochemistry
Ocean acidification
ocean warming
trace metals
Event label
Station label
DEPTH, water
Temperature, water
Salinity
Alkalinity, total
Carbon, inorganic, dissolved
pH
Carbon, organic, dissolved
Iron
Measured
Modeled
Global marine biogeochemical cycles of trace elements and their isotopes GEOTRACES
Online Access:https://dx.doi.org/10.1594/pangaea.952541
https://doi.pangaea.de/10.1594/PANGAEA.952541
Description
Summary:Iron (Fe) is an important limiting nutrient in the marine environment constraining primary production across much of the ocean due to its sparse solubility in seawater. Iron availability regulates the magnitude and dynamics of ocean primary productivity, and is dependent on Fe solubility and speciation in seawater which in turn are influenced by physico-chemical properties such as pH, temperature, dissolved organic material. In this study, the apparent iron solubility (SFe(III)app) is calculated in an oversaturated system by setting an input of dissolved Fe(III) to 10 nmol L-1, at ambient ocean pH, temperature and dissolved organic carbon concentrations. This will result in the precipitation of Fe hydroxide, as ferrihydrite assumed in our system. The SFe(III)app is defined as the sum of aqueous inorganic Fe(III) species and Fe(III) bound to DOM, formed at a free Fe (Fe3+) concentration equal to the limiting solubility of Fe hydroxide (Fe(OH)3(s)). We compared calculated apparent iron solubility to measured ...

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