@article{fdi:010085311,
  title = {{I}nfluence of the {A}mazon-{O}rinoco discharge interannual variability on the {W}estern {T}ropical {A}tlantic salinity and temperature},
  author = {{G}{\'e}vaudan, {M}. and {D}urand, {F}abien and {J}ouanno, {J}ulien},
  editor = {},
  language = {{ENG}},
  abstract = {{O}ver the last three decades, extreme floods have become increasingly frequent in the {A}mazon basin, affecting strongly the population and ecosystems of the area. {H}owever, the impact of these extreme events on the tropical {A}tlantic {O}cean is still poorly known. {I}n this study, we use a 1/4 degrees coupled ocean-atmosphere model to assess the impact of the runoff interannual variability on the sea surface salinity and sea surface temperature of the area. {T}win sensitivity experiments are performed, forced alternatively with interannually-varying and climatological river runoff. {C}omposite fields for the highest floods and lowest floods are also compared. {T}his combination of sensitivity tests and composite extremes allows to separate the effect of runoff interannual variability from the rest of the variability (typically driven by mixing, advection and precipitation). {W}e show that the runoff interannual variability modulates the sea surface salinity of the {A}mazon plume with the same order of magnitude as the salinity variability driven by ocean dynamics and atmospheric forcing. {H}owever, due to vertical mixing, this oceanic imprint of the extreme floods is limited to a few months and a few hundred kilometers from the mouth. {Y}ears of extreme floods generally coincide with anomalous phases of the {A}tlantic {M}eridional {M}ode, which are associated with large-scale sea surface temperature anomalies over the tropical {A}tlantic {O}cean. {O}ur results did not reveal any significant modulation of these temperature anomalies by the runoff interannual variability, at any time of the year, questioning the relevance of a hydrological feedback on the tropical {A}tlantic sea surface temperature.},
  keywords = {{A}mazon plume ; extreme floods ; regional modeling ; tropical {A}tlantic ; {O}cean ; {A}tlantic {M}eridional {M}ode ; {ATLANTIQUE} ; {ZONE} {TROPICALE} ; {AMAZONE} ; {ORENOQUE}},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch : {O}ceans},
  volume = {127},
  numero = {6},
  pages = {e2022{JC}018495 [17 ]},
  ISSN = {2169-9275},
  year = {2022},
  DOI = {10.1029/2022jc018495},
  URL = {https://www.documentation.ird.fr/hor/fdi:010085311},
}