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Provedor de dados:  ArchiMer
País:  France
Título:  Productivity in tropical upwelling areas considered by a new method of analysis and determination.
Autores:  Minas, H
Minas, M
Packard, T
Data:  1984-11
Ano:  1984
Palavras-chave:  Primary production
Dynamical oceanography
T/S diagrams
Pelagic environment
Analytical techniques
Biological production
Resumo:  When in frontal zones of upwelling areas, a two-component mixing of nutrient rich upwelled water and oligotrophic offshore waters occurs, the amounts of nutrient consumed (- Delta N) and oxygen produced (+ Delta O2) can be evaluated by a detailed analysis of diagrams, in which salinity is the conservative parameter. By this same method, the corresponding T-S diagram allows a determination of the net heat gain of the upwelling water body during its offshore transport, and consequently the corresponding residence time in the photic zone. By integrating the nutrient consumption over the whole upwelling area, it is possible to obtain a more realistic average value of the productivity than with direct measurements of photosynthetic activity (14C and other incubation methods). The Pacific Ocean upwellings are richer, and within the Atlantic Ocean, the nutrient richer SACW in regard to the NACW (south and North Atlantic Central Waters) explains greater carbon budgets in the concerned upwelling zones.
Tipo:  Text
Idioma:  Inglês
Editor:  Actes de colloques. Ifremer. Brest [ACTES COLLOQ. IFREMER.]. 1984
Formato:  application/pdf

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