SWINGEDOUW, Didier; ORTEGA, Pablo; MIGNOT, Juliette; GUILYARDI, Éric; MASSON-DELMOTTE, Valérie; BUTLER, Paul G.; KHODRI, Myriam; SÉFÉRIAN, Roland

doi:10.1038/ncomms7545

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

SWINGEDOUW, Didier

Environnements et Paléoenvironnements OCéaniques [EPOC]

ORTEGA, Pablo
Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques [LOCEAN]

MIGNOT, Juliette
Processus de la variabilité climatique tropicale et impacts [PARVATI]

Langue

Article de revue

Ce document a été publié dans

Nature Communications. 2015-03-30, vol. 6, p. 6545

Résumé en anglais

While bidecadal climate variability has been evidenced in several North Atlantic paleoclimaterecords, its drivers remain poorly understood. Here we show that the subset of CMIP5historical climate simulations that produce such bidecadal variability exhibits a robustsynchronization, with a maximum in Atlantic Meridional Overturning Circulation (AMOC) 15years after the 1963 Agung eruption. The mechanisms at play involve salinity advection fromthe Arctic and explain the timing of Great Salinity Anomalies observed in the 1970s and the1990s. Simulations, as well as Greenland and Iceland paleoclimate records, indicate thatcoherent bidecadal cycles were excited following five Agung-like volcanic eruptions of the lastmillennium. Climate simulations and a conceptual model reveal that destructive interferencecaused by the Pinatubo 1991 eruption may have damped the observed decreasing trend of theAMOC in the 2000s. Our results imply a long-lasting climatic impact and predictabilityfollowing the next Agung-like eruption.< Réduire

URI

https://oskar-bordeaux.fr/handle/20.500.12278/200502

DOI

http://dx.doi.org/10.1038/ncomms7545

Project ANR

LabEx Institut Pierre Simon Laplace (IPSL): Understand climate and anticipate future changes - ANR-10-LABX-0018

Unités de recherche

EPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805