@article{fdi:010079769,
  title = {{E}nhanced vertical mixing in coastal upwelling systems driven by diurnal-inertial resonance : numerical experiments},
  author = {{F}earon, {G}. and {H}erbette, {S}. and {V}eitch, {J}. and {C}ambon, {G}ildas and {L}ucas, {A}. {J}. and {L}emarie, {F}. and {V}ichi, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he land-sea breeze is resonant with the inertial response of the ocean at the critical latitude of 30 degrees {N}/{S}. 1-{D} vertical numerical experiments were undertaken to study the key drivers of enhanced diapycnal mixing in coastal upwelling systems driven by diurnal-inertial resonance near the critical latitude. {T}he effect of the land boundary was implicitly included in the model through the "{C}raig approximation" for first-order cross-shore surface elevation gradient response. {T}he model indicates that for shallow water depths (<similar to 100 m), bottom shear stresses must be accounted for in the formulation of the "{C}raig approximation," as they serve to enhance the cross-shore surface elevation gradient response, while reducing shear and mixing at the thermocline. {T}he model was able to predict the observed temperature and current features during an upwelling/mixing event in 60 m water depth in {S}t {H}elena {B}ay (similar to 32.5 degrees {S}, southern {B}enguela), indicating that the locally forced response to the land-sea breeze is a key driver of diapycnal mixing over the event. {A}lignment of the subinertial {E}kman transport with the surface inertial oscillation produces shear spikes at the diurnal-inertial frequency; however their impact on mixing is secondary when compared with the diurnal-inertial resonance phenomenon. {T}he amplitude of the diurnal anticyclonic rotary component of the wind stress represents a good diagnostic for the prediction of diapycnal mixing due to diurnal-inertial resonance. {T}he local enhancement of this quantity over {S}t {H}elena {B}ay provides strong evidence for the importance of the land-sea breeze in contributing to primary production in this region through nutrient enrichment of the surface layer.},
  keywords = {inertial oscillation ; land-sea breeze ; diurnal-inertial resonance ; coastal upwelling ; diapycnal mixing ; phytoplankton blooms ; {ATLANTIQUE} ; {AFRIQUE} {DU} {SUD} ; {BENGUELA} ; {SAINT} {HELENA} {BAIE}},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch : {O}ceans},
  volume = {125},
  numero = {9},
  pages = {e2020{JC}016208 [23 p.]},
  ISSN = {2169-9275},
  year = {2020},
  DOI = {10.1029/2020jc016208},
  URL = {https://www.documentation.ird.fr/hor/fdi:010079769},
}