@article{fdi:010057045,
  title = {{S}ubtropical dipole modes simulated in a coupled general circulation model},
  author = {{M}orioka, {Y}. and {T}ozuka, {T}. and {M}asson, {S}. and {T}erray, {P}ascal and {L}uo, {J}. {J}. and {Y}amagata, {T}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he growth and decay mechanisms of subtropical dipole modes in the southern {I}ndian and {S}outh {A}tlantic {O}ceans and their impacts on southern {A}frican rainfall are investigated using results from a coupled general circulation model originally developed for predicting tropical climate variations. {T}he second (most) dominant mode of interannual sea surface temperature ({SST}) variations in the southern {I}ndian ({S}outh {A}tlantic) {O}cean represents a northeast-southwest oriented dipole, now called subtropical dipole mode. {T}he positive (negative) {SST} interannual anomaly pole starts to grow in austral spring and reaches its peak in {F}ebruary. {I}n austral late spring, the suppressed (enhanced) latent heat flux loss associated with the variations in the subtropical high causes a thinner (thicker) than normal mixed layer thickness that, in turn, enhances (reduces) the warming of the mixed layer by the climatological shortwave radiation. {T}he positive (negative) pole gradually decays in austral fall because the mixed layer cooling by the entrainment is enhanced (reduced), mostly owing to the larger (smaller) temperature difference between the mixed layer and the entrained water. {T}he increased (decreased) latent heat loss due to the warmer (colder) {SST} also contributes to the decay of the positive (negative) pole. {A}lthough further verification using longer observational data is required, the present coupled model suggests that the {S}outh {A}tlantic subtropical dipole may play a more important role in rainfall variations over the southern {A}frican region than the {I}ndian {O}cean subtropical dipole.},
  keywords = {},
  booktitle = {},
  journal = {{J}ournal of {C}limate},
  volume = {25},
  numero = {12},
  pages = {4029--4047},
  ISSN = {0894-8755},
  year = {2012},
  DOI = {10.1175/jcli-d-11-00396.1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010057045},
}