Twin Experiment 1

Data assimilation setting

Noise model

In this experiment, the model uncertainty is assumed to come from the a number of model input parameters at four locations (see red circles on the figure below). The noise processes for each parameter are assumed additive and modelled by an AR(1) process with the following statistics:

1. Algal Diatom: standard deviation 0.5 μg/L, correlation time 72 hours
2. Algal Cyanobacteria: standard deviation 0.2 μg/L, correlation time 72 hours
3. Algal Green Algae: standard deviation 0.2 μg/L, correlation time 72 hours
4. Phosphate: standard deviation 0.05 μg/L, correlation time 72 hours
5. Discharge: standard deviation 0.2 m3/s, correlation time 72 hours
6. Global Radiation: standard deviation 0.5 W/m2, correlation time 24 hours

Observation station

Results