@article{fdi:010086899,
  title = {{C}irculation and stratification drivers during the summer season in the upwelling bay of {P}aracas ({P}eru) : a modelling study},
  author = {{A}rellano, {C}. and {E}chevin, {V}incent and {M}erma-{M}ora, {L}. and {C}hamorro, {A}. and {G}utierrez, {D}. and {A}guirre-{V}elarde, {A}. and {T}am, {J}. and {C}olas, {F}ran{\c{c}}ois},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he circulation and stratification in the shallow semi-enclosed bay of {P}aracas located downstream of the main upwelling cell off the {P}eruvian coast were studied during the summer season using a regional circulation model and in situ observations. {A} downscaling strategy based on a series of three embedded grids, from 10 km to 500 m resolution in the bay allows to take into account the influence of remote perturbations on the bay dynamics. {D}ebiased surface winds from a high-resolution regional atmospheric model were used to force the model. {T}he shortwave absorption depth was parameterized using satellite measurements of surface chlorophyll.{S}ensitivity experiments to the model forcing and parameterizations were performed to investigate the impact of the wind diurnal variability, tidal forcing, freshwater discharge from a nearby river and shortwave absorption depth on the bay stratification. {R}esults show that: debiasing the wind intensity reduced the model cold bias in the bay and increase the stratification; a shallow shortwave absorption depth induced a cooling of the subsurface water, increasing the stratification; freshwater discharge from the {P}isco river north of the bay increased slightly the stratification in the bay during days of weak wind. {T}he high sensitivity of the bay stratification to the at-mospheric forcing calls for the need to use more realistic wind forcing products. {T}he circulation in the bay under strong (>5.5 m s-1) and weak (<3 m s-1) winds was also examined. {T}he summer circulation during strong upwelling-favorable wind conditions was characterized by northward surface currents transporting the bay surface waters outward and subsurface currents transporting cold deeper waters into the bay along its western shore. {D}uring weak wind conditions, the current is outward in the bottom layer and a surface southward current related to the poleward undercurrent flowing over the continental slope and shelf transported warm waters into the bay, generating a cyclonic circulation in the bay.},
  keywords = {{B}ay dynamics ; {U}pwelling ; {C}oastal wind ; {N}umerical modelling ; {PEROU} ; {PACIFIQUE}},
  booktitle = {},
  journal = {{C}ontinental {S}helf {R}esearch},
  volume = {254},
  numero = {},
  pages = {104923 [15 ]},
  ISSN = {0278-4343},
  year = {2023},
  DOI = {10.1016/j.csr.2022.104923},
  URL = {https://www.documentation.ird.fr/hor/fdi:010086899},
}