@article{fdi:010061994,
  title = {{T}he role of subpolar deep water formation and {N}ordic {S}eas overflows in simulated multidecadal variability of the {A}tlantic meridional overturning circulation},
  author = {{L}ohmann, {K}. and {J}ungclaus, {J}. {H}. and {M}atei, {D}. and {M}ignot, {J}uliette and {M}enary, {M}. and {L}angehaug, {H}. {R}. and {B}a, {J}. and {G}ao, {Y}. and {O}ttera, {O}. {H}. and {P}ark, {W}. and {L}orenz, {S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e investigate the respective role of variations in subpolar deep water formation and {N}ordic {S}eas overflows for the decadal to multidecadal variability of the {A}tlantic meridional overturning circulation ({AMOC}). {T}his is partly done by analysing long (order of 1000 years) control simulations with five coupled climate models. {F}or all models, the maximum influence of variations in subpolar deep water formation is found at about 45 degrees {N}, while the maximum influence of variations in {N}ordic {S}eas overflows is rather found at 55 to 60 degrees {N}. {R}egarding the two overflow branches, the influence of variations in the {D}enmark {S}trait overflow is, for all models, substantially larger than that of variations in the overflow across the {I}celand-{S}cotland {R}idge. {T}he latter might, however, be underestimated, as the models in general do not realistically simulate the flow path of the {I}celand-{S}cotland overflow water south of the {I}celand-{S}cotland {R}idge. {T}he influence of variations in subpolar deep water formation is, on multimodel average, larger than that of variations in the {D}enmark {S}trait overflow. {T}his is true both at 45 degrees {N}, where the maximum standard deviation of decadal to multidecadal {AMOC} variability is located for all but one model, and at the more classical latitude of 30 degrees {N}. {A}t 30 degrees {N}, variations in subpolar deep water formation and {D}enmark {S}trait overflow explain, on multimodel average, about half and one-third respectively of the decadal to multidecadal {AMOC} variance. {A}part from analysing multimodel control simulations, we have performed sensitivity experiments with one of the models, in which we suppress the variability of either subpolar deep water formation or {N}ordic {S}eas overflows. {T}he sensitivity experiments indicate that variations in subpolar deep water formation and {N}ordic {S}eas overflows are not completely independent. {W}e further conclude from these experiments that the decadal to multidecadal {AMOC} variability north of about 50 degrees {N} is mainly related to variations in {N}ordic {S}eas overflows. {A}t 45 degrees {N} and south of this latitude, variations in both subpolar deep water formation and {N}ordic {S}eas overflows contribute to the {AMOC} variability, with neither of the processes being very dominant compared to the other.},
  keywords = {{ATLANTIQUE} {NORD} ; {MER} {DU} {NORD}},
  booktitle = {},
  journal = {{O}cean {S}cience},
  volume = {10},
  numero = {2},
  pages = {227--241},
  ISSN = {1812-0784},
  year = {2014},
  DOI = {10.5194/os-10-227-2014},
  URL = {https://www.documentation.ird.fr/hor/fdi:010061994},
}