@article{fdi:010062284,
  title = {{R}ole of tropical {SST} variability on the formation of subtropical dipoles},
  author = {{M}orioka, {Y}. and {M}asson, {S}. and {T}erray, {P}ascal and {P}rodhomme, {C}. and {B}ehera, {S}. {K}. and {M}asumoto, {Y}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}nterannual variations of sea surface temperature ({SST}) in the midlatitudes of the {S}outhern {H}emisphere play an important role in the rainfall variability over the surrounding countries by modulating synoptic-scale atmospheric disturbances. {T}hese are frequently associated with a northeast southwest-oriented dipole of positive and negative {SST} anomalies in each oceanic basin, referred to as a subtropical dipole. {T}his study investigates the role of tropical {SST} variability on the generation of subtropical dipoles by conducting {SST}-nudging experiments using a coupled general circulation model. {I}n the experiments where the simulated {SST} in each tropical basin is nudged to the climatology of the observed {SST}, the subtropical dipoles tend to occur as frequently as the case in which the simulated {SST} is allowed to freely interact with the atmosphere. {I}t is found that without the tropical {SST} variability, the zonally elongated atmospheric mode in the mid- to high latitudes, called the {A}ntarctic {O}scillation ({AAO}), becomes dominant and the stationary {R}ossby waves related to the {AAO} induce the sea level pressure ({SLP}) anomalies in the midlatitudes, which, in turn, generate the subtropical dipoles. {T}hese results suggest that the tropical {SST} variability may not be necessary for generating the subtropical dipoles, and hence provide a useful insight into the important role of the {AAO} in the midlatitude climate variability.},
  keywords = {{ATLANTIQUE} {SUD} ; {PACIFIQUE} {SUD} ; {OCEAN} {INDIEN} {SUD}},
  booktitle = {},
  journal = {{J}ournal of {C}limate},
  volume = {27},
  numero = {12},
  pages = {4486--4507},
  ISSN = {0894-8755},
  year = {2014},
  DOI = {10.1175/jcli-d-13-00506.1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010062284},
}