@article{fdi:010070867,
  title = {{I}ndian {O}cean and {I}ndian summer monsoon : relationships without {ENSO} in ocean-atmosphere coupled simulations},
  author = {{C}retat, {J}. and {T}erray, {P}ascal and {M}asson, {S}. and {S}ooraj, {K}. {P}. and {R}oxy, {M}. {K}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he relationship between the {I}ndian {O}cean and the {I}ndian summer monsoon ({ISM}) and their respective influence over the {I}ndo-{W}estern {N}orth {P}acific ({WNP}) region are examined in the absence of {E}l {N}ino {S}outhern {O}scillation ({ENSO}) in two partially decoupled global experiments. {ENSO} is removed by nudging the tropical {P}acific simulated sea surface temperature ({SST}) toward {SST} climatology from either observations or a fully coupled control run. {T}he control reasonably captures the observed relationships between {ENSO}, {ISM} and the {I}ndian {O}cean {D}ipole ({IOD}). {D}espite weaker amplitude, {IOD}s do exist in the absence of {ENSO} and are triggered by a boreal spring ocean-atmosphere coupled mode over the {S}outh-{E}ast {I}ndian {O}cean similar to that found in the presence of {ENSO}. {T}hese pure {IOD}s significantly affect the tropical {I}ndian {O}cean throughout boreal summer, inducing a significant modulation of both the local {W}alker and {H}adley cells. {T}his meridional circulation is masked in the presence of {ENSO}. {H}owever, these pure {IOD}s do not significantly influence the {I}ndian subcontinent rainfall despite overestimated {SST} variability in the eastern equatorial {I}ndian {O}cean compared to observations. {O}n the other hand, they promote a late summer cross-equatorial quadrupole rainfall pattern linking the tropical {I}ndian {O}cean with the {WNP}, inducing important zonal shifts of the {W}alker circulation despite the absence of {ENSO}. {S}urprisingly, the interannual {ISM} rainfall variability is barely modified and the {I}ndian {O}cean does not force the monsoon circulation when {ENSO} is removed. {O}n the contrary, the monsoon circulation significantly forces the {A}rabian {S}ea and {B}ay of {B}engal {SST}s, while its connection with the western tropical {I}ndian {O}cean is clearly driven by {ENSO} in our numerical framework. {C}onvection and diabatic heating associated with above-normal {ISM} induce a strong response over the {WNP}, even in the absence of {ENSO}, favoring moisture convergence over {I}ndia.},
  keywords = {{C}oupled climate model ; {E}l {N}ino-{S}outhern {O}scillation ; {I}ndian {O}cean ({D}ipole) ; {I}ndian summer monsoon ; {O}cean-atmosphere interactions ; {R}ainfall ; {OCEAN} {INDIEN}},
  booktitle = {},
  journal = {{C}limate {D}ynamics},
  volume = {49},
  numero = {4},
  pages = {1429--1448},
  ISSN = {0930-7575},
  year = {2017},
  DOI = {10.1007/s00382-016-3387-x},
  URL = {https://www.documentation.ird.fr/hor/fdi:010070867},
}