@article{fdi:010070999,
  title = {{M}odification of sea surface temperature by chlorophyll concentration in the {A}tlantic upwelling systems},
  author = {{H}ernandez, {O}. and {J}ouanno, {J}ulien and {E}chevin, {V}incent and {A}umont, {O}livier},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he influence of the chlorophyll on the upper {T}ropical {A}tlantic {O}cean is investigated with long-term (1979-2012) regional oceanic simulations with 1/48 horizontal resolution based on the {NEMO}3.6 model. {T}he model solar radiation penetration scheme depends on the chlorophyll concentration. {S}imulations with time and spatially varying concentrations obtained from satellite ocean color observations are compared with a simulation forced with constant chlorophyll concentration of 0.05 mg m(-3), representative of chlorophyll depleted waters. {R}esults indicate that regions of the {T}ropical {A}tlantic with chlorophyll concentrations larger than in the reference simulation (i.e., [chl] > 0.05 mg m(-3)) get warmer at the surface, with the exception of the main upwelling regions where high chlorophyll concentrations are associated with a significant cooling of the sea surface (similar to 1 degrees {C} in the {B}enguela upwelling). {T}he analysis of the model heat balance shows that the biological differential heating causes negative temperature anomalies in subsurface source waters prior to their upwelling at the coast. {T}he shallow mixed-layer in the eastern equatorial and tropical {A}tlantic favors the persistence of these subsurface anomalies and may explain why the {B}enguela is particularly sensitive to the biological differential heating. {I}n spite of the presence of high chlorophyll concentrations in the upwelling regions, both the larger amount of shortwave radiation captured in the surface layers and the modifications of the horizontal and vertical advection at the coast are found to play a secondary role in the {SST} change in the upwelling region.},
  keywords = {{ATLANTIQUE} ; {MAURITANIE} ; {SENEGAL} ; {ZONE} {TROPICALE} ; {BENGUELA}},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch : {O}ceans},
  volume = {122},
  numero = {7},
  pages = {5367--5389},
  ISSN = {2169-9275},
  year = {2017},
  DOI = {10.1002/2016jc012330},
  URL = {https://www.documentation.ird.fr/hor/fdi:010070999},
}