Table 1 Fe speciation term for particles depending on \(\frac{{{{\rm{Fe}}}}^{3+}}{\sum {{\rm{Fe}}}}\), defined by comparison with standards

From: Antarctic glaciers export carbon-stabilised iron(II)-rich particles to the surface Southern Ocean

Dominant Fe speciation

\(\frac{{{{\rm{Fe}}}}^{3+}}{\sum {{\rm{Fe}}}}\)

Fe(II)

<20

Fe(II) rich mix

20 – 50

Fe(III) rich mix

50 – 80

Fe(III)

80 − 100

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