Question about data assimilation

ze miscellaneous
1

Hello,

Is it possible to run interanual croco simulations with data assimilation (like roms 4dvar)?,
Or at least to nudge the model sst to satellite data (e.g OSTIA)?

Cheers,
Lucas.

2

There is no 4DVAR for CROCO but a 3DVAR is under development. In the mean time, nudging is of course possible. For SST, #undef BULK_FLUX leads to #define QCORRECTION which corrects surface heat flux with SST nudging. For interior nudging to T,S you can use #define ROBUST_DIAG, which will nudge to what is put in tclm and sclm arrays.

3

Thanks for the quick answer,
I understand… Is there a way of to nudge the model SST while keeping the BULK_FLUX formulation?

4

you could #define QCORRECTION at the same time as BULK_FLUX but you would have to modify get_vbc.F (set_vbc routine) where the nudging is conditional on BULK_FLUX not being defined. But keep in mind that BULK_FLUX already has some form of nudging to atmospheric temperature data.

5

We are many waiting for the 3DVAR update! it would be great to have such code :slight_smile: