Articles | Volume 20, issue 2
https://doi.org/10.5194/bg-20-405-2023
https://doi.org/10.5194/bg-20-405-2023
Research article
 | 
25 Jan 2023
Research article |  | 25 Jan 2023

Tracing differences in iron supply to the Mid-Atlantic Ridge valley between hydrothermal vent sites: implications for the addition of iron to the deep ocean

Alastair J. M. Lough, Alessandro Tagliabue, Clément Demasy, Joseph A. Resing, Travis Mellett, Neil J. Wyatt, and Maeve C. Lohan

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Cited articles

Ardyna, M., Lacour, L., Sergi, S., d'Ovidio, F., Sallée, J.-B., Rembauville, M., Blain, S., Tagliabue, A., Schlitzer, R., Jeandel, C., Arrigo, K. R., and Claustre, H.: Hydrothermal vents trigger massive phytoplankton blooms in the Southern Ocean, Nat. Commun., 10, 2451, https://doi.org/10.1038/s41467-019-09973-6, 2019. 
Baker, E. T., Resing, J. A., Haymon, R. M., Tunnicliffe, V., Lavelle, J. W., Martinez, F., Ferrini, V., Walker, S. L., and Nakamura, K.: How many vent fields? New estimates of vent field populations on ocean ridges from precise mapping of hydrothermal discharge locations, Earth Planet. Sc. Lett., 449, 186–196, https://doi.org/10.1016/j.epsl.2016.05.031, 2016. 
Beaulieu, S. E., Baker, E. T., German, C. R., and Maffei, A.: An authoritative global database for active submarine hydrothermal vent fields [data set], Geochem. Geophy. Geosy., 14, 4892–4905, https://doi.org/10.1002/2013gc004998, 2013. 
Bennett, S. A., Achterberg, E. P., Connelly, D. P., Statham, P. J., Fones, G. R., and German, C. R.: The distribution and stabilisation of dissolved Fe in deep-sea hydrothermal plumes, Earth Planet. Sc. Lett., 270, 157–167, https://doi.org/10.1016/j.epsl.2008.01.048, 2008. 
Breier, J. A., Sheik, C. S., Gomez-Ibanez, D., Sayre-McCord, R. T., Sanger, R., Rauch, C., Coleman, M., Bennett, S. A., Cron, B. R., Li, M., German, C. R., Toner, B. M., and Dick, G. J.: A large volume particulate and water multi-sampler with in situ preservation for microbial and biogeochemical studies, Deep-Sea Res. Pt. I, 94, 195–206, https://doi.org/10.1016/j.dsr.2014.08.008, 2014. 
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Short summary
Iron is a key nutrient for ocean primary productivity. Hydrothermal vents are a source of iron to the oceans, but the size of this source is poorly understood. This study examines the variability in iron inputs between hydrothermal vents in different geological settings. The vents studied release different amounts of Fe, resulting in plumes with similar dissolved iron concentrations but different particulate concentrations. This will help to refine modelling of iron-limited ocean productivity.
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