@article{fdi:010090623,
  title = {{S}patiotemporal variability and drivers of modeled primary production rates in the {N}orthern {H}umboldt {C}urrent {S}ystem},
  author = {{M}ogollón, {R}. and {C}olas, {F}ran{\c{c}}ois and {E}chevin, {V}incent and {T}am, {J}. and {E}spinoza-{M}orriberón, {D}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A} coupled physical-biogeochemical model was employed to explore the spatiotemporal dynamics of primary production ({PP}) rates within the {N}orthern {H}umboldt {C}urrent {S}ystem ({NHCS}). {T}he coastal zone spanning 250 km from the shore, from 3 degrees to 18 degrees {S}, stands out as a highly productive upwelling region, exhibiting an average surface {PP} value of 2.5 mol {C} m -3 yr -1 . {C}orrespondingly, the average vertically integrated {PP} within the euphotic layer amounts to 13 mol {C} m -2 yr -1 . {I}n this context, summer emerges as the peak of productivity, yielding 18 mol {C} m -2 yr -1 , while winter signifies the period of least productivity, with 9 mol {C} m -2 yr -1 . {O}ur study revealed that surface {PP} variability is primarily driven by changes in surface chlorophyll and phytoplanktonic biomass (mainly diatoms), followed by changes in photosynthetically active radiation ({PAR}) levels. {D}uring summertime, these three drivers contribute to substantial positive anomalies in surface {PP}. {H}owever, the reduction in nutrient availability resulting from weakened upwelling-favorable winds has a slight negative impact on surface {PP} rates. {Y}et, this decline is offset by a positive thermal effect during the warmer season. {I}n contrast, during the winter season, a significant decrease in surface chlorophyll concentrations due to a vertical redistribution into a deeper mixed layer significantly diminishes surface {PP}. {F}urthermore, the reduction in both {PAR} levels and biomass concentrations has a comparable effect, further contributing to the decrease in surface {PP} rates during wintertime. {A}t a depth of 20 m, changes in {PP} are primarily driven by variations between the opposing influences of {PAR} and chlorophyll concentrations. {W}hile {PAR} adheres to the seasonal cycle of warming and cooling throughout the year, chlorophyll -driven anomalies exhibit an inverse pattern to those at the surface, influenced by the vertical dilution effect within the mixed layer. {O}verall, this study provides valuable insights into the complex interplay of drivers that govern {PP} dynamics across various depths within one of the world's most productive marine regions.},
  keywords = {{P}rimary production ; {H}umboldt {C}urrent {S}ystem ; {ROMS} model ; {PISCES} ; biogeochemical model ; {PACIFIQUE} ; {PEROU}},
  booktitle = {},
  journal = {{O}cean {M}odelling},
  volume = {189},
  numero = {},
  pages = {102347 [14 p.]},
  ISSN = {1463-5003},
  year = {2024},
  DOI = {10.1016/j.ocemod.2024.102347},
  URL = {https://www.documentation.ird.fr/hor/fdi:010090623},
}