@article{PAR00004850, title = {{H}ydrothermal contribution to the oceanic dissolved iron inventory}, author = {{T}agliabue, {A}. and {B}opp, {L}. and {D}utay, {J}. {C}. and {B}owie, {A}. {R}. and {C}hever, {F}. and {J}ean-{B}aptiste, {P}. and {B}ucciarelli, {E}. and {L}annuzel, {D}. and {R}emenyi, {T}. and {S}arthou, {G}. and {A}umont, {O}livier and {G}ehlen, {M}. and {J}eandel, {C}.}, editor = {}, language = {{ENG}}, abstract = {{I}ron limits phytoplankton growth and hence the biological carbon pump in the {S}outhern {O}cean(1). {M}odels assessing the impacts of iron on the global carbon cycle generally rely on dust input and sediment resuspension as the predominant sources(2,3). {A}lthough it was previously thought that most iron from deep-ocean hydrothermal activity was inaccessible to phytoplankton because of the formation of particulates(4), it has been suggested that iron from hydrothermal activity(5-7) may be an important source of oceanic dissolved iron(8-13). {H}ere we use a global ocean model to assess the impacts of an annual dissolved iron flux of approximately 9 x 10(8) mol, as estimated from regional observations of hydrothermal activity(11,12), on the dissolved iron inventory of the world's oceans. {W}e find the response to the input of hydrothermal dissolved iron is greatest in the {S}outhern {H}emisphere oceans. {I}n particular, observations of the distribution of dissolved iron in the {S}outhern {O}cean(3) ({C}hever et al., manuscript in preparation; {B}owie et al., manuscript in preparation) can be replicated in our simulations only when our estimated iron flux from hydrothermal sources is included. {A}s the hydrothermal flux of iron is relatively constant over millennial timescales(14), we propose that hydrothermal activity can buffer the oceanic dissolved iron inventory against shorter-term fluctuations in dust deposition.}, keywords = {}, booktitle = {}, journal = {{N}ature {G}eoscience}, volume = {3}, numero = {4}, pages = {252--256}, ISSN = {1752-0894}, year = {2010}, DOI = {10.1038/ngeo818}, URL = {https://www.documentation.ird.fr/hor/{PAR}00004850}, }