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| Aumont, O.; Ethe, C.; Tagliabue, A.; Bopp, L.; Gehlen, M.. |
| PISCES-v2 (Pelagic Interactions Scheme for Carbon and Ecosystem Studies volume 2) is a biogeochemical model which simulates the lower trophic levels of marine ecosystems (phytoplankton, microzooplankton and meso-zooplankton) and the biogeochemical cycles of carbon and of the main nutrients (P, N, Fe, and Si). The model is intended to be used for both regional and global configurations at high or low spatial resolutions as well as for short-term (seasonal, interannual) and long-term (climate change, paleoceanography) analyses. There are 24 prognostic variables (tracers) including two phytoplankton compartments (diatoms and nanophytoplankton), two zooplankton size classes (micro-zooplankton and mesozooplankton) and a description of the carbonate chemistry.... |
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| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00288/39908/38456.pdf |
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| Hernandez, O.; Jouanno, J.; Echevin, V.; Aumont, O.. |
| The influence of the chlorophyll on the upper Tropical Atlantic Ocean is investigated with long-term (1979-2012) regional oceanic simulations with 1/48 horizontal resolution based on the NEMO3.6 model. The model solar radiation penetration scheme depends on the chlorophyll concentration. Simulations with time and spatially varying concentrations obtained from satellite ocean color observations are compared with a simulation forced with constant chlorophyll concentration of 0.05 mg m(-3), representative of chlorophyll depleted waters. Results indicate that regions of the Tropical Atlantic with chlorophyll concentrations larger than in the reference simulation (i.e., [chl] > 0.05 mg m(-3)) get warmer at the surface, with the exception of the main... |
| Tipo: Text |
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| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00623/73555/73222.pdf |
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| Jose, Y. S.; Penven, P.; Aumont, O.; Machu, E.; Moloney, C. L.; Shillington, F.; Maury, O.. |
| We used a coupled physical-biogeochemical model to investigate how the strong eddy activity typical of the Mozambique Channel affects biological production. A numerical experiment was carried out, in which mesoscale dynamics were suppressed by cancelling the nonlinear terms for horizontal momentum in the Naviers-Stokes equation. Mesoscale dynamics were found to be responsible for (1) increased offshore production in the Mozambique Channel as a result of net eddy-induced offshore transport of nutrient-rich coastal waters; (2) decreased shelf production along the central Mozambican and south-west Madagascar coast caused by a reduction in nutrient availability related to the net eddy-induced lateral transport of nutrients; (3) increased coastal production... |
| Tipo: Text |
Palavras-chave: Mesoscale dynamics; Chlorophyll; Primary production; Mozambique Channel. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00317/42860/42286.pdf |
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