@article{fdi:010068164,
  title = {{D}o the {A}mazon and {O}rinoco freshwater plumes really matter for hurricane-induced ocean surface cooling ?},
  author = {{H}ernandez, {O}. and {J}ouanno, {J}ulien and {D}urand, {F}abien},
  editor = {},
  language = {{ENG}},
  abstract = {{R}ecent studies suggested that the plume of low-saline waters formed by the discharge of the {A}mazon and {O}rinoco rivers could favor {A}tlantic {T}ropical {C}yclone ({TC}) intensification by weakening the cool wake and its impact on the hurricane growth potential. {T}he main objective of this study is to quantify the effects of the {A}mazon-{O}rinoco river discharges in modulating the amplitude of {TC}-induced cooling in the western {T}ropical {A}tlantic. {O}ur approach is based on the analysis of {TC} cool wake statistics obtained from an ocean regional numerical simulation with 1/4 degrees horizontal resolution over the 1998-2012 period, forced with realistic {TC} winds. {I}n both model and observations, the amplitude of {TC}-induced cooling in plume waters (0.3-0.4 degrees {C}) is reduced significantly by around 50-60% compared to the cooling in open ocean waters out of the plume (0.6-0.7 degrees {C}). {A} twin simulation without river runoff shows that {TC}-induced cooling over the plume region (defined from the reference experiment) is almost unchanged (similar to 0.03 degrees {C}) despite strong differences in salinity stratification and the absence of barrier layers. {T}his argues for a weaker than thought cooling inhibition effect of salinity stratification and barrier layers in this region. {I}ndeed, results suggest that haline stratification and barrier layers caused by the river runoff may explain only similar to 10% of the cooling difference between plume waters and open ocean waters. {I}nstead, the analysis of the background oceanic conditions suggests that the regional distribution of the thermal stratification is the main factor controlling the amplitude of cooling in the plume region.},
  keywords = {{ATLANTIQUE} ; {AMAZONE} ; {ORENOQUE}},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch : {O}ceans},
  volume = {121},
  numero = {4},
  pages = {2119--2141},
  ISSN = {2169-9275},
  year = {2016},
  DOI = {10.1002/2015jc011021},
  URL = {https://www.documentation.ird.fr/hor/fdi:010068164},
}