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- Input increments from the 2D-OI for snow depth (arpifs/obs_preproc/obsgen.F90)
- Input additional EDA Jacobians related to snow (arpifs/sekf/sekf_geteda_jacobians.F90)
- Covariances between soil moisture and snow depth are set to 0
- Covariances between snow water equivalent and 2m temperature, relative humidity, soil moisture are also set to 0 (consider snow depth only)
- Jacobians between snow water equivalent and snow depth are based on the relationship in the model (set to 1/rsn)
- Analyse snow water equivalent using the increments and Jacobians (arpifs/sekf/sm_ekf_main.F90)
Result
Future work
- Input snow observations directly in the SEKF (the same task as soil moisture analysis using 2m temperature and relative humidity)
- Need to implement a localization in observation space
- Each QC should also be implemented in the SEKF
- Consider flow dependent background errorsÂ