@article{fdi:010065359,
  title = {{R}econciling two alternative mechanisms behind bi-decadal variability in the {N}orth {A}tlantic},
  author = {{O}rtega, {P}. and {M}ignot, {J}uliette and {S}wingedouw, {D}. and {S}evellec, {F}. and {G}uilyardi, {E}.},
  editor = {},
  language = {{ENG}},
  abstract = {{U}nderstanding the preferential timescales of variability in the {N}orth {A}tlantic, usually associated with the {A}tlantic meridional overturning circulation ({AMOC}), is essential for the prospects for decadal prediction. {H}owever, the wide variety of mechanisms proposed from the analysis of climate simulations, potentially dependent on the models themselves, has stimulated the debate of which processes take place in reality. {O}ne mechanism receiving increasing attention, identified both in idealized models and observations, is a westward propagation of subsurface buoyancy anomalies that impact the {AMOC} through a basin-scale intensification of the zonal density gradient, enhancing the northward transport via thermal wind balance. {I}n this study, we revisit a control simulation from the {I}nstitut {P}ierre-{S}imon {L}aplace {C}oupled {M}odel 5{A} ({IPSL}-{CM}5{A}), characterized by a strong {AMOC} periodicity at 20 years, previously explained by an upper ocean atmosphere sea ice coupled mode driving convection activity south of {I}celand. {O}ur study shows that this mechanism interacts constructively with the basin-wide propagation in the subsurface. {T}his constructive feedback may explain why bi-decadal variability is so intense in this coupled model as compared to others.},
  keywords = {{ATLANTIQUE} {NORD}},
  booktitle = {},
  journal = {{P}rogress in {O}ceanography},
  volume = {137},
  numero = {{A}},
  pages = {237--249},
  ISSN = {0079-6611},
  year = {2015},
  DOI = {10.1016/j.pocean.2015.06.009},
  URL = {https://www.documentation.ird.fr/hor/fdi:010065359},
}