Modelling the biogeochemical cycles of elements limiting primary production in the English channel .1. Role of thermohaline stratification


Autoria(s): Menesguen, Alain; Hoch, Thierry
Data(s)

01/01/1997

Resumo

This paper presents the general framework of an ecological model of the English Channel. The model is a result of combining a physical sub-model with a biological one. in the physical submodel, the Channel is divided into 71 boxes and water fluxes between them are calculated automatically. A 2-layer, vertical thermohaline model was then linked with the horizontal circulation scheme. This physical sub-model exhibits thermal stratification in the western Channel during spring and summer and haline stratification in the Bay of Seine due to high flow rates from the river. The biological sub-model takes 2 elements, nitrogen and silicon, into account and divides phytoplankton into diatoms and dinoflagellates. Results from this ecological model emphasize the influence of stratification on chlorophyll a concentrations as well as on primary production. Stratified waters appear to be much less productive than well-mixed ones. Nevertheless, when simulated production values are compared with literature data, calculated production is shown to be underestimated. This could be attributed to a lack of refinement of the 2-layer box-model or processes omitted from the biological model, such as production by nanoplankton.

Formato

application/pdf

Identificador

http://archimer.ifremer.fr/doc/00337/44790/44479.pdf

DOI:10.3354/meps146173

http://archimer.ifremer.fr/doc/00337/44790/

Idioma(s)

eng

Publicador

Inter-research

Direitos

Inter-Research 1997

info:eu-repo/semantics/openAccess

restricted use

Fonte

Marine Ecology Progress Series (0171-8630) (Inter-research), 1997-01 , Vol. 146 , N. 1-3 , P. 173-188

Palavras-Chave #ecological box-model #thermohaline stratification #English Channel #primary production
Tipo

text

Publication

info:eu-repo/semantics/article