Nonlinear Shallow-Water Model of the Black Sea

Initial conditions and boundary parametrization are controlled in the model of upper layer of the Black sea assimilating Dynamical sea level altimeter data collected in ERS-1 and TOPEX/Poseidon missions. These data as well as the wind tension on the surface of the Black sea have been kindly provided by Gennady Korotaev from the Marine Hydrophysical Institute, Sevastopol, Ukraine.

We assimilate data during 50 days and look at the evolution of the difference "model-data" during 500 dys after the assimilation. We see that controlling initial state of the model results in lower difference on a limited time interval (100-150 days) only, while controlling boundary parametrization ensures the solution closer to observational data all the 500 days long.

Evolution of the difference between model's solution and observations.
No assimilation -- red line, Initial state control -- green line, Boundary parametrization control -- blue line.

Last modified Jan 2010