A nonlinear closure approach to develop new planktonic ecosystem model (Invited)
Abstract
In real oceanic observations, species populations are observed to be highly intermittent. Yet to study ecosystem dynamics, mathematical modelers normally use the mean value of each population as variables for their models. This actually reflects some kind of approximated result under certain condition. Using closure approach for a simple nutrient-phytoplankton model in this theoretical study, we have shown how consideration of fluctuating part in model variable can affect the system dynamics. Also we have found a critical value of this fluctuation below which the non-closure model and the mean value from the closure model shows to exhibit the same result. Therefore this analysis gives an impression about the importance of fluctuating part of model variables and also an idea when to use closure approach for model formulation.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2013
- Bibcode:
- 2013AGUFMNG33B..06M
- Keywords:
-
- 4805 OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL Biogeochemical cycles;
- processes;
- and modeling;
- 4855 OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL Phytoplankton;
- 4815 OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL Ecosystems;
- structure;
- dynamics;
- and modeling