Continental and sea ice iron sources fertilize the Southern Ocean in synergy - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Geophysical Research Letters Année : 2021

Continental and sea ice iron sources fertilize the Southern Ocean in synergy

Résumé

Iron release from melting continental and sea ice is deemed important for phytoplankton, the growth of which is iron-limited in the Southern Ocean. Both sources are generally considered separately, yet their effects on the biological carbon pump could interact. Using 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 Southern Ocean total, with continental ice contributing +4.5% and sea ice +8.0%. The +1.4% residual is due to a coupled fertilization effect: When the iron source from continental ice is activated, iron in sea ice increases by 16%, so does iron transport toward low production areas. Overall, this increases phytoplankton activity: Fertilization is more efficient where sea ice melts than at locations of initial iron release by continental ice.
Fichier principal
Vignette du fichier
Geophysical Research Letters - 2021 - Person - Continental and Sea Ice Iron Sources Fertilize the Southern Ocean in Synergy.pdf (1.51 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03451384 , version 1 (26-02-2022)

Licence

Paternité

Identifiants

Citer

Renaud Person, M. Vancoppenolle, Olivier Aumont, Manon Malsang. Continental and sea ice iron sources fertilize the Southern Ocean in synergy. Geophysical Research Letters, 2021, 48 (23), pp.e2021GL094761. ⟨10.1029/2021GL094761⟩. ⟨hal-03451384⟩
137 Consultations
26 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More