Dataset associated with "A mineralogy-based anthropogenic combustion-iron emission inventory"

Rathod, Sagar
Hamilton, Douglas
Mahowald, Natalie
Corbett, James
Klimont, Zbigniew
Bond, Tami
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The atmospheric supply of iron can modulate ocean biogeochemistry, due to its key role in global nitrogen and carbon cycles, with current estimates predicting up to 20% of global ocean net primary productivity depending on this source. We estimate anthropogenic iron using a detailed technology-based estimation method, resolve it into mineral components, and model soluble iron emissions using various available solubility representation methods including mineralogy. Including metal smelting as a source that emits about 75% of anthropogenic iron, we show that anthropogenic iron emissions are up to 10 times higher in the fine aerosol fraction (<1 µm) than previous inventories. We find that in regions where primary productivity is iron limited, anthropogenic combustion-iron contributes up to half of the soluble iron flux to North Pacific Ocean, but less than 5% to the Southern Ocean. We also find that increasing complexity in representing anthropogenic iron solubility does not necessarily improve model-observation comparison and factors other than under anthropogenic influence largely affect solubility.
Contains yearly-averaged total and soluble iron concentration and deposition fields along with separate variables for dust and combustion.
Department of Atmospheric Science
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Associated Publications
Rathod, S. D., Hamilton, D. S.,Mahowald, N. M., Klimont, Z., Corbett,J. J., & Bond, T. C. (2020). A mineralogy-based anthropogenic combustion-iron emission inventory. Journal of Geophysical Research: Atmospheres, 125, e2019JD032114.