@article{fdi:010083849, title = {{C}ontinental and sea ice iron sources fertilize the {S}outhern {O}cean in synergy}, author = {{P}erson, {R}enaud and {V}ancoppenolle, {M}. and {A}umont, {O}livier and {M}alsang, {M}.}, editor = {}, language = {{ENG}}, abstract = {{I}ron release from melting continental and sea ice is deemed important for phytoplankton, the growth of which is iron-limited in the {S}outhern {O}cean. {B}oth sources are generally considered separately, yet their effects on the biological carbon pump could interact. {U}sing a global ocean-sea-ice-biogeochemical model with a representation of both continental and sea ice iron sources, we find them to have an overall additive effect on phytoplankton activity, increasing carbon export by +13.9% of the {S}outhern {O}cean total, with continental ice contributing +4.5% and sea ice +8.0%. {T}he +1.4% residual is due to a coupled fertilization effect: {W}hen the iron source from continental ice is activated, iron in sea ice increases by 16%, so does iron transport toward low production areas. {O}verall, this increases phytoplankton activity: {F}ertilization is more efficient where sea ice melts than at locations of initial iron release by continental ice.}, keywords = {iron ; cryosphere ; {S}outhern {O}cean ; fertilization ; biological carbon pump ; modeling ; {OCEAN} {ANTARCTIQUE} ; {OCEAN} {AUSTRAL}}, booktitle = {}, journal = {{G}eophysical {R}esearch {L}etters}, volume = {48}, numero = {23}, pages = {e2021{GL}094761 [9 ]}, ISSN = {0094-8276}, year = {2021}, DOI = {10.1029/2021gl094761}, URL = {https://www.documentation.ird.fr/hor/fdi:010083849}, }