Investigating atmospheric Fe supply to the ocean using stable isotope ratios and chemical speciation

March 14, 2026Oceanography in JapanOpen Access

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Key Points

The study aims to understand the contribution of atmospheric aerosols to oceanic iron supply and its implications for ecosystems and climate.
Analysis of stable iron isotopes in atmospheric aerosols and seawater
Observation of iron contributions from anthropogenic sources
Assessment of isotope fractionation during high-temperature processes
Identified up to 50% contribution of anthropogenic iron in aerosols during summer in the North Pacific
Demonstrated that seawater iron isotope ratios do not directly reflect aerosol isotope ratios
Highlighted the need to consider biological uptake and other fractionation processes

Observational study uncovers the contribution of anthropogenic iron to ocean ecosystems, indicating environmental impacts.

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Minako Kurisu (2026) studied this question.

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