Digital filter initialization and negative time steps

[coccines]

Dear All,

is anyone aware of the possibility of using digital filter initialization with ROMS?
Also, is there a possibility of setting negative time steps (i.e., modelling back in time)?

Thanks for your time.
Regards,
Ines

[jivica]

I had problem with data assimilation and shocks when applying all increments to the initial state at t0.
As far as I know Andy is working on it and in the near? future it should be available.
This is "normal" approach to use in the atmospheric DA.
Ivica