@article{fdi:010068756,
  title = {{W}hat drives the spatial variability of primary productivity and matter fluxes in the north-west {A}frican upwelling system ? {A} modelling approach},
  author = {{A}uger, {P}.-{A}. and {G}orgues, {T}homas and {M}achu, {E}ric and {A}umont, {O}livier and {B}rehmer, {P}atrice},
  editor = {},
  language = {{ENG}},
  abstract = {{A} comparative box analysis based on a multi-decadal physical-biogeochemical hindcast simulation (1980-2009) was conducted to characterize the drivers of the spatial distribution of phytoplankton biomass and production in the north-west ({NW}) {A}frican upwelling system. {A}longshore geostrophic flow related to large-scale circulation patterns associated with the influence of coastal topography is suggested to modulate the coastal divergence, and then the response of nutrient upwelling to wind forcing. {I}n our simulation, this translates into a coastal upwelling of nitrate being significant in all regions but the {C}ape {B}lanc ({CB}) area. {H}owever, upwelling is found to be the dominant supplier of nitrate only in the northern {S}aharan {B}ank ({NSB}) and the {S}enegalo-{M}auritanian ({SM}) regions. {E}lsewhere, nitrate supply is dominated by meridional advection, especially off {C}ape {B}lanc. {P}hytoplankton displays a similar behaviour with a supply by lateral advection which equals the net coastal phytoplankton growth in all coastal regions except the {S}enegalo-{M}auritanian area. {N}oticeably, in the {C}ape {B}lanc area, the net coastal phytoplankton growth is mostly sustained by high levels of regenerated production exceeding new production by more than twofold, which is in agreement with the locally weak input of nitrate by coastal upwelling. {F}urther offshore, the distribution of nutrients and phytoplankton is explained by the coastal circulation. {I}ndeed, in the northern part of our domain (i.e. {S}aharan {B}ank), the coastal circulation is mainly alongshore, resulting in low offshore lateral advection of nutrients and phytoplankton. {C}onversely, lateral advection transports coastal nutrients and phytoplankton towards offshore areas in the latitudinal band off the {S}enegalo-{M}auritanian region. {M}oreover, this latter offshore region benefits from transient southern intrusions of nutrient-rich waters from the {G}uinean upwelling.},
  keywords = {{ATLANTIQUE} ; {SENEGAL} ; {MAURITANIE}},
  booktitle = {},
  journal = {{B}iogeosciences},
  volume = {13},
  numero = {23},
  pages = {6419--6440},
  ISSN = {1726-4170},
  year = {2016},
  DOI = {10.5194/bg-13-6419-2016},
  URL = {https://www.documentation.ird.fr/hor/fdi:010068756},
}