@article{fdi:010064006,
  title = {{U}sing simulations of the last millennium to understand climate variability seen in palaeo-observations : similar variation of {I}celand-{S}cotland overflow strength and {A}tlantic {M}ultidecadal {O}scillation},
  author = {{L}ohmann, {K}. and {M}ignot, {J}uliette and {L}angehaug, {H}. {R}. and {J}ungclaus, {J}. {H}. and {M}atei, {D}. and {O}ttera, {O}. {H}. and {G}ao, {Y}. {Q}. and {M}jell, {T}. {L}. and {N}innemann, {U}. {S}. and {K}leiven, {H}. {F}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A} recent palaeo-reconstruction of the strength of the {I}celand-{S}cotland overflow during the last 600 years suggests that its low-frequency variability exhibits strong similarity with palaeo-reconstructions of the {A}tlantic {M}ultidecadal {O}scillation ({AMO}). {T}he underlying mechanism of the similar variation remains unclear, however, based on palaeo-reconstructions alone. {I}n this study we use simulations of the last millennium driven by external forcing reconstructions with three coupled climate models in order to investigate possible mechanisms underlying the similar variation of {I}celand-{S}cotland overflow strength and {AMO} index. {S}imilar variation of the two time series is also largely found in the model simulations. {O}ur analysis indicates that the basin-wide {AMO} index in the externally forced simulations is dominated by the low-latitude sea surface temperature ({SST}) variability and is not predominantly driven by variations in the strength of the {A}tlantic meridional overturning circulation ({MOC}). {T}his result suggests that a large-scale link through the strength of the {MOC} is not sufficient to explain the (simulated) similar variation of {I}celand-{S}cotland overflow strength and {AMO} index. {R}ather, a more local link through the influence of the {N}ordic seas surface state and density structure, which are positively correlated with the {AMO} index, on the pressure gradient across the {I}celand-{S}cotland ridge is responsible for the (simulated) similar variation. {I}n the model simulation showing a weaker correlation between the {I}celand-{S}cotland overflow strength and the {AMO} index, the wind stress in the {N}ordic seas also influences the overflow strength. {O}ur study demonstrates that palaeo-climate simulations provide a useful tool to understand mechanisms and large-scale connections associated with the relatively sparse palaeo-observations.},
  keywords = {{ATLANTIQUE} {NORD} ; {ISLANDE} ; {ECOSSE}},
  booktitle = {},
  journal = {{C}limate of the {P}ast},
  volume = {11},
  numero = {2},
  pages = {203--216},
  ISSN = {1814-9324},
  year = {2015},
  DOI = {10.5194/cp-11-203-2015},
  URL = {https://www.documentation.ird.fr/hor/fdi:010064006},
}