@article{fdi:010061919, title = {{T}he impact of different external sources of iron on the global carbon cycle}, author = {{T}agliabue, {A}. and {A}umont, {O}livier and {B}opp, {L}.}, editor = {}, language = {{ENG}}, abstract = {{V}ariable supply of iron to the ocean is often invoked to explain part of past changes in atmospheric {CO}2 ({CO}2atm). {U}sing model simulations, we find that {CO}2atm is sensitive on the order of 15, 2, and 1ppm to sedimentary, dust, and hydrothermal iron input. {CO}2atm is insensitive to dust because it is not the major iron input to the {S}outhern {O}cean. {M}odifications to the relative export of {S}i({OH})(4) to low latitudes are opposite to those predicted previously. {A}lthough hydrothermalism is the major control on the iron inventory in similar to 25% of the ocean, it remains restricted to the deep ocean, with minor effects on {CO}2atm. {N}evertheless, uncertainties regarding the iron-binding ligand pool can have significant impacts on {CO}2atm. {O}ngoing expansion of iron observations as part of {GEOTRACES} will be invaluable in refining these results.}, keywords = {iron ; carbon ; ocean ; biogeochemistry ; phytoplankton}, booktitle = {}, journal = {{G}eophysical {R}esearch {L}etters}, volume = {41}, numero = {3}, pages = {920--926}, ISSN = {0094-8276}, year = {2014}, DOI = {10.1002/2013gl059059}, URL = {https://www.documentation.ird.fr/hor/fdi:010061919}, }