@article{fdi:010095540,
  title = {{U}nveiling the global oceanic influence of {A}tlantic multidecadal variability using pacemaker experiments},
  author = {{J}iang, {W}. {M}. and {F}rankignoul, {C}. and {G}astineau, {G}. and {M}ignot, {J}uliette and {L}i, {F}. {L}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}tlantic multidecadal variability ({AMV}) significantly impacts regional and global climate, as evidenced by observations and climate model simulations. {P}revious sensitivity experiments investigating the {AMV} were mostly based on climate model simulations in which the {N}orth {A}tlantic sea surface temperatures ({NASST}s) were nudged to a fixed {AMV} pattern. {H}ere, the global influence of {AMV} is explored using an ensemble of pacemaker experiments where {NASST}s are nudged to the time-varying observational records. {T}en ensemble members proved sufficient to distinguish forced signals from internal climate variability. {U}sing high-pass-filtered data to inform how the response to the {AMV} is established, we confirm that the {AMV} primarily affects the global ocean through its tropical component. {T}he oceanic response to a warm {AMV} anomaly unfolds in four phases: 1) warming of the western {P}acific warm pool and development of anomalous easterlies in the western {I}ndo-{P}acific driven by diabatic heating over the tropical {A}tlantic within the first 6 months, 2) eastward propagation of equatorial thermocline anomalies and establishment of {L}a {N}i & ntilde;a-like conditions in the eastern {P}acific after 7-10 months, 3) persistence of {L}a {N}i & ntilde;a conditions during 11-20 months via {B}jerknes feedback and weakening of the {A}leutian low through tropical teleconnections, and 4) emergence of a negative {P}acific decadal oscillation pattern in the {N}orth {P}acific after 21-25 months. {O}ur findings highlight the importance of using time-varying {SST} observations in pacemaker experiments to capture the full complexity of interbasin connections.},
  keywords = {{A}tlantic {O}cean ; {A}tmosphere-ocean interaction ; {ENSO} ; {P}acific decadal oscillation ; {C}limate variability ; {M}ultidecadal variability ; {ATLANTIQUE} ; {PACIFIQUE}},
  booktitle = {},
  journal = {{J}ournal of {C}limate},
  volume = {38},
  numero = {23},
  pages = {7089--7104},
  ISSN = {0894-8755},
  year = {2025},
  DOI = {10.1175/jcli-d-25-0088.1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010095540},
}