@article{fdi:010062699,
  title = {{A} multi-model comparison of {A}tlantic multidecadal variability},
  author = {{B}a, {J}. and {K}eenlyside, {N}. {S}. and {L}atif, {M}. and {P}ark, {W}. and {D}ing, {H}. and {L}ohmann, {K}. and {M}ignot, {J}uliette and {M}enary, {M}. and {O}ttera, {O}. {H}. and {W}outers, {B}. and {M}elia, {D}. {S}. {Y}. and {O}ka, {A}. and {B}ellucci, {A}. and {V}olodin, {E}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A} multi-model analysis of {A}tlantic multidecadal variability is performed with the following aims: to investigate the similarities to observations; to assess the strength and relative importance of the different elements of the mechanism proposed by {D}elworth et al. ({J} {C}lim 6: 1993-2011, 1993) (hereafter {D}93) among coupled general circulation models ({CGCM}s); and to relate model differences to mean systematic error. {T}he analysis is performed with long control simulations from ten {CGCM}s, with lengths ranging between 500 and 3600 years. {I}n most models the variations of sea surface temperature ({SST}) averaged over {N}orth {A}tlantic show considerable power on multidecadal time scales, but with different periodicity. {T}he {SST} variations are largest in the mid-latitude region, consistent with the short instrumental record. {D}espite large differences in model configurations, we find quite some consistency among the models in terms of processes. {I}n eight of the ten models the mid-latitude {SST} variations are significantly correlated with fluctuations in the {A}tlantic meridional overturning circulation ({AMOC}), suggesting a link to northward heat transport changes. {C}onsistent with this link, the three models with the weakest {AMOC} have the largest cold {SST} bias in the {N}orth {A}tlantic. {T}here is no linear relationship on decadal timescales between {AMOC} and {N}orth {A}tlantic {O}scillation in the models. {A}nalysis of the key elements of the {D}93 mechanisms revealed the following: {M}ost models present strong evidence that highlatitude winter mixing precede {AMOC} changes. {H}owever, the regions of wintertime convection differ among models. {I}n most models salinity-induced density anomalies in the convective region tend to lead {AMOC}, while temperatureinduced density anomalies lead {AMOC} only in one model. {H}owever, analysis shows that salinity may play an overly important role in most models, because of cold temperature biases in their relevant convective regions. {I}n most models subpolar gyre variations tend to lead {AMOC} changes, and this relation is strong in more than half of the models.},
  keywords = {{A}tlantic multidecadal variability ({AMV}) ; {A}tlantic meridional overturning circulation ({AMOC}) ; {N}orth {A}tlantic {O}scillation ({NAO}) ; {S}ubpolar gyre ({SPG}) ; {ATLANTIQUE}},
  booktitle = {},
  journal = {{C}limate {D}ynamics},
  volume = {43},
  numero = {9-10},
  pages = {2333--2348},
  ISSN = {0930-7575},
  year = {2014},
  DOI = {10.1007/s00382-014-2056-1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010062699},
}