Data from: Recent (1980-to-2015) trends and variability in daily-to-interannual soluble iron deposition from dust, fire, and anthropogenic sources

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The iron cycle is a key component of the Earth system. Yet how variable the atmospheric flux of soluble (bioaccessible) iron into oceans is, and how this variability is modulated by human activity and a changing climate, is not well-known. Quantifying soluble iron daily-to-interannual deposition variability from all major iron sources, not only dust, will advance quantification of changes in marine biogeochemistry in response to the continuing human perturbation to the Earth System. The data in this repository relates to Hamilton et al. (2020) which characterized Satellite Era (1980-to-2015) daily-to-interannual modelled soluble iron emission and deposition variability from both pyrogenic (fires and anthropogenic combustion) and dust sources. Multi-model monthly mean soluble iron and dust deposition data is provided, as presented in the main manuscript. Also provided is daily deposition data for CAM6. A new transient monthly varying (1980 to 2015) anthropogenic (sum of combustion and metal smelting) iron emission data set was developed for this study, that data set is also included here.

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Thumbnail image credit: NASA Earth Observatory images by Joshua Stevens, using GEOS data from the Global Modeling and Assimilation Office at NASA GSFC,


DSH, LL, and NMM would like to acknowledge support from DE-SC000679, DE-SC0016362, and Cornell Atkinson Center for Sustainability funding. JFK acknowledges support from National Science Foundation (NSF) grants 1552519 and 1856389. HM was supported by the Ministry of Education, Culture, Sports, Science, and Technology and the Japan Society for the Promotion of Science (MEXT/JSPS) KAKENHI Grant Numbers JP17H04709 and JP19H05699, by the MEXT Arctic Challenge for Sustainability (ArCS) and ArCS-II projects, and by the Environment Research and Technology Development Fund (2–1703 and 2-2003) of the Environmental Restoration and Conservation Agency.

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atmospheric iron cycle; soluble iron deposition; biogeochemistry; anthropogenic iron emissions


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Hamilton, D. S., Scanza, R. A., Rathod, S. D., Bond, T. C., Kok, J. F., Li, L., et al. (2020). Recent (1980‐to‐2015) trends and variability in daily‐to‐interannual soluble iron deposition from dust, fire, and anthropogenic sources. Geophysical Research Letters, 47, e2020GL089688.

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