@incollection{fdi:42795,
  title = {{V}itesses verticales et production potentielle dans l'upwelling de {M}auritanie en mars 1973},
  author = {{H}erbland, {A}lain and {V}oituriez, {B}.},
  editor = {},
  language = {{FRE}},
  abstract = {{A} long duration station (60 hours) was covered where an active upwelling was expected to occur ({C}ap {T}imiris area, {M}auritania). {A}s soon as the wind enhanced (from 4-5 m/s to 11 m/s) the surface temperature decreased and nitrate concentration increased. {A} highly significant negative correlation was found between the temperature at 10 m and the time (r= -0.966, n=21). {S}urface heating due to solar irradiation occured each day. {T}he mean decrease of surface temperature was one degre per day over 60 hours. {T}he maximum upward velocity determined from the vertical displacement of the isotherms and nitrate isolines over 15 h intervals was about 4.5 x 10-2 cm/s. {F}rom that speed, the nitrate input in the euphotic layer is calculated and the potential production estimated at 21 g {C}/m2/d. {F}rom that value and in situ primary production measurements, the upwelling efficiency is evaluated at 30-40% for the first level of the food chain. ({R}{\'e}sum{\'e} d'auteur)},
  keywords = {{UPWELLING} ; {FONCTIONNEMENT} {DE} {L}'{ECOSYSTEME} ; {VITESSE} ; {CONSEQUENCE} {ECOLOGIQUE} ; {TEMPERATURE} {DE} {SURFACE} ; {VARIABILITE} ; {PRODUCTIVITE} {BIOLOGIQUE} ; {MAURITANIE} ; {TIMIRIS} {CAP}},
  booktitle = {{T}he {C}anary {C}urrent : studies of an upwelling system},
  volume = {180},
  numero = {5/6},
  pages = {131--134},
  address = {{C}openhague},
  publisher = {{CIEM}},
  series = {{R}apport et {P}roc{\`e}s-{V}erbaux des {R}{\'e}unions du {C}onseil {I}nternational pour l'{E}xploration de la {M}er},
  year = {1982},
  ISSN = {0074-4336},
  URL = {https://www.documentation.ird.fr/hor/fdi:42795},
}