Nimbus-7 Coastal Zone Color Scanner Pictures of Phytoplankton Growth on an Upwelling Front in Senegal

Dupouy, Cécile; Rebert, Jean-Paul; Touré, D.

doi:10.1016/s0422-9894(08)71067-5

Cited by 3 publications

(2 citation statements)

References 19 publications

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“…Dans les régions où le vent fort SC maintient longtemps, I'upwelling est intense et permanent. Les poussées phytoplanctoniques n'ont lieu que sur les franges du panache des eaux résurgentes (Grall et al, 1973;Dupouy et al, 1986). Le rapport des biomasses auto+hétfrotrophes/productcurs primaires montre que la meilleure utilisation du phytoplancton par le zooplancton se fait l une grande distance de la source de I'upwelling.…”

Section: Cycles Déséquilibrisunclassified

Rôle possible d'une intensification des alizés sur le changement de répartition des sardines et sardinelles le long de la côte Ouest africaine

Binet

1988

Aquat. Living Resour.

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Section: Cycles Déséquilibrisunclassified

Rôle possible d'une intensification des alizés sur le changement de répartition des sardines et sardinelles le long de la côte Ouest africaine

Binet

1988

Aquat. Living Resour.

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“…Much of that work has focused on estimates of total primary production from surface pigment concentrations and/or light intensity (Lorenzen 1970, Smith et at. 1982, Dupouy et al 1986, Platt 1986, English et al 1987, Balch et al 1989, Frouin et al 1989. Sathyendranath et al (1991) estimated new production from satellite imagery by applying an appropriate f-ratio (Eppley and Peterson 1979) to their estimates of total production.…”

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Nitrate supply and potential new production in the Benguela upwelling system

Waldron¹,

Probyn²

1992

South African Journal of Marine Science

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A new method of estimating the potential annual new production of the Benguela upwelling system is presented. With data from the northern and southern Benguela. a negatively correlated regression was established between sea surface temperature (SST) and NOrN integrated over the depth zone of the biologically productive surface layer. This permitted quantification of the NOrN available for production for a specific upwelling event from a NOAA satellite image of SST covering the whole Benguela. The regressed value was considered equivalent to the potential new production of that particular upwelling event and was expressed in carbon terms via the Redfield ratio. This figure was extrapolated to an annual figure by the identification of the number of upwelling events in that year from daily METEOSAT images and supported by synoptic weather maps. The result (4,7 x ]013 gC'y-1) compared well intra-and interregionally and globally. Assumptions implicit in the estimation method and ways of improving the data set upon which the regressions were based are discussed. Any refinements resulting from this would fine tune the result but are thought unlikely to alter the order of magnitude estimation.

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