@article{fdi:010074104,
  title = {{A} subsurface {I}ndian {O}cean dipole response to tropical volcanic eruptions},
  author = {{I}zumo, {T}akeshi and {K}hodri, {M}yriam and {L}engaigne, {M}atthieu and {S}uresh, {I}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he impacts of explosive volcanism on the densely populated {I}ndian {O}cean ({IO}) region remain elusive. {D}edicated sensitivity experiments indicate that tropical volcanic eruptions induce a stronger surface cooling over {A}frica than of ocean, promoting westerlies in the equatorial {IO}. {T}hese westerlies drive a subsurface response reminiscent to that of a negative {IO} {D}ipole ({IOD}) during autumn in the year of eruption. {T}he eruption also drives an enhanced cooling over the northwestern {IO} as a direct response to climatological cloud cover distribution. {T}he resulting anomalous zonal sea surface temperature gradient contributes to enhance equatorial westerly anomalies in summer. {T}he response is sensitive to the {IO} preconditioning, being larger when the system is favorable to a positive {IOD} development. {V}olcanic eruptions also induce a subsurface {IOD}-like response in the multimodel database from the {C}oupled {M}odel {I}ntercomparison {P}roject {P}hase 5 as well as a primary productivity decrease in the eastern {IO}. {P}lain {L}anguage {S}ummary {E}xplosive volcanism induces a global surface cooling, but its regional impact on the densely populated {I}ndian {O}cean sector is poorly documented. {H}ere we show that the volcanic eruptions induce a subsurface ocean response in autumn of the eruption's year, reminiscent to that of a negative {I}ndian {O}cean {D}ipole, an intrinsic climate mode in the {I}ndian {O}cean equivalent to {E}l {N}ino in the {P}acific. {T}his subsurface response is driven by equatorial westerly anomalies resulting from the stronger surface cooling over the {A}frican landmass than over the ocean. {T}he response is sensitive to the {I}ndian {O}cean preconditioning, being larger when the system is preconditioned toward a positive {I}ndian {O}cean {D}ipole development.},
  keywords = {tropical volcanic eruption ; {I}ndian {O}cean ; {I}ndian {O}cean {D}ipole ({IOD}) ; ocean primary productivity ({PP}) ; {C}oupled {M}odel {I}ntercomparison {P}roject ({CMIP}) ; {OCEAN} {INDIEN}},
  booktitle = {},
  journal = {{G}eophysical {R}esearch {L}etters},
  volume = {45},
  numero = {17},
  pages = {9150--9159},
  ISSN = {0094-8276},
  year = {2018},
  DOI = {10.1029/2018gl078515},
  URL = {https://www.documentation.ird.fr/hor/fdi:010074104},
}