Vertical ocean heat redistribution sustaining sea-ice concentration trends in the Ross Sea - Université Pierre et Marie Curie Accéder directement au contenu
Article Dans Une Revue Nature Communications Année : 2017

Vertical ocean heat redistribution sustaining sea-ice concentration trends in the Ross Sea

Résumé

Several processes have been hypothesized to explain the slight overall expansion of Antarctic sea ice over the satellite observation era, including externally forced changes in local winds or in the Southern Ocean’s hydrological cycle, as well as internal climate variability. Here, we show the critical influence of an ocean–sea-ice feedback. Once initiated by an external perturbation, it may be sufficient to sustain the observed sea-ice expansion in the Ross Sea, the region with the largest and most significant expansion. We quantify the heat trapped at the base of the ocean mixed layer and demonstrate that it is of the same order of magnitude as the latent heat storage due to the long-term changes in sea-ice volume. The evidence thus suggests that the recent ice coverage increase in the Ross Sea could have been achieved through a reorganization of energy within the near-surface ice-ocean system.
Fichier principal
Vignette du fichier
s41467-017-00347-4.pdf (2.03 Mo) Télécharger le fichier
Origine : Publication financée par une institution
Loading...

Dates et versions

hal-01589955 , version 1 (19-09-2017)

Licence

Paternité

Identifiants

Citer

Olivier Lecomte, Hugues Goosse, Thierry Fichefet, Casimir de Lavergne, Antoine Barthélemy, et al.. Vertical ocean heat redistribution sustaining sea-ice concentration trends in the Ross Sea. Nature Communications, 2017, 8, pp.258. ⟨10.1038/s41467-017-00347-4⟩. ⟨hal-01589955⟩
812 Consultations
149 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More