@article{fdi:010072726,
  title = {{S}patiotemporal variability of the {S}outh {P}acific convergence zone fresh pool eastern front from coral-derived surface salinity data},
  author = {{D}assie, {E}. {P}. and {H}asson, {A}. and {K}hodri, {M}yriam and {L}ebas, {N}. and {L}insley, {B}. {K}.},
  editor = {},
  language = {{ENG}},
  abstract = {{D}irect observations indicate a southeastward expansion of the {S}outh {P}acific convergence zone ({SPCZ}) fresh pool and a freshening trend since the 1970s. {U}nderstanding decadal and longer-term variability of the {SPCZ} fresh pool and of the salinity front located at its southeastern margin has been limited by the scarcity of instrumental sea surface salinity ({SSS}) measurements. {T}his study uses coral {O}-18 as a proxy for {SSS} to extend the salinity record back to the 1880s, from three different locations across the {SSS} front: {F}iji, {T}onga, and {R}arotonga ({FTR} region). {H}igh percentages of observed {SSS} variance are explained by multicoral {O}-18 mean composite at each site. {A}t the interannual time scale, the salinity front displacement over the last 200 years follows the {E}l {N}ino-{S}outhern {O}scillation ({ENSO}) index. {T}he different {E}l {N}ino flavors are observable in the amplitude of the salinity front interannual displacement. {H}owever, no significant changes in either the frequency or the amplitude of its displacements were observed. {A}t longer time scales, the timing and magnitude of the freshening trend vary among sites. {T}he earliest freshening onset of about -0.06 psu decade(-1) is detected in {F}iji (around 1865), then {R}arotonga (around 1939), and {T}onga (around 1982). {T}he role of atmospheric freshwater fluxes on {SSS} variability is evaluated by comparing coral {SSS} to historical precipitation data. {T}he results suggest that, despite the known influence of the interdecadal {P}acific oscillation ({IPO}) negative phases on increasing atmospheric freshwater fluxes and lowering {SSS} in the {FTR} region, ocean dynamics has a dominant influence at decadal time scale and in the onset of freshening trends.},
  keywords = {{C}limate variability ; {I}nterannual variability ; {I}nterdecadal variability ; {O}ceanic variability ; {P}acific decadal oscillation ; {T}ropical variability ; {PACIFIQUE} ; {ZONE} {TROPICALE}},
  booktitle = {},
  journal = {{J}ournal of {C}limate},
  volume = {31},
  numero = {8},
  pages = {3265--3288},
  ISSN = {0894-8755},
  year = {2018},
  DOI = {10.1175/jcli-d-17-0071.1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010072726},
}