@article{fdi:010081482,
  title = {{S}ensitivity of the {A}tlantic meridional overturning circulation and climate to tropical {I}ndian {O}cean warming},
  author = {{F}erster, {B}. {S}. and {F}edorov, {A}. {V}. and {M}ignot, {J}uliette and {G}uilyardi, {E}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A} salient feature of anthropogenic climate change is the enhanced warming of the tropical {I}ndian {O}cean ({TIO}) relative to the tropics. {R}ecent studies show that this warming can remotely modulate the {A}tlantic meridional overturning circulation ({AMOC}). {M}otivated by these results, we systematically study the sensitivity of the {AMOC} and {A}tlantic climate to changes in {TIO} temperature using the latest coupled climate model from the {I}nstitut {P}ierre {S}imon {L}aplace ({IPSL}-{CM}6{A}-{LR}). {E}nsemble experiments nudging the {TIO} surface temperatures by - 2 degrees {C}, - 1 degrees {C}, + 1 degrees {C}, and + 2 degrees {C} are conducted. {W}ithin a few years after the forcing is imposed, different atmospheric teleconnections begin to drive the {AMOC} "fast" and "slow" responses, yielding after 150 years an {AMOC} equilibrium sensitivity of about + 9.4 {S}v per 1 degrees {C} of relative {TIO} warming. {A} water mass transformation analysis shows that the fast response to {TIO} warming (on decadal timescales) is largely driven by surface cooling in the {L}abrador {S}ea caused by an induced positive {N}orth {A}tlantic {O}scillation ({NAO})-like mean pattern. {B}y contrast, the slow response (on multi-decadal to centennial timescales) is driven by the gradual advection of positive salinity anomalies from the tropical {A}tlantic, which predominantly affect the {N}ordic {S}eas. {T}he response is non-linear in that a {TIO} warming strengthens the {AMOC} through increase in {L}abrador {S}ea deep water formation, while a {TIO} cooling slows down the {AMOC} via sea ice expansion over the {N}ordic {S}eas deep-water formation region, ultimately leading to the {AMOC} shut-down in the - 2 degrees {C}-{TIO} experiment. {T}hese results help understand the role of interbasin connections and {AMOC} drivers in a warming climate.},
  keywords = {{AMOC} ; {N}orth {A}tlantic ; {T}eleconnections ; {N}orth {A}tlantic {O}scillation ; {I}ndian {O}cean warming ; {A}rctic sea ice ; {OCEAN} {INDIEN} ; {ATLANTIQUE}},
  booktitle = {},
  journal = {{C}limate {D}ynamics},
  volume = {[{E}arly access]},
  numero = {},
  pages = {[19 ]},
  ISSN = {0930-7575},
  year = {2021},
  DOI = {10.1007/s00382-021-05813-w},
  URL = {https://www.documentation.ird.fr/hor/fdi:010081482},
}