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  1. Input analysed snow depth from the 2D-OI (arpifs/obs_preproc/obsgen.F90)
  2. Calculate and input additional EDA Jacobians related to snow (gen/fetchmars, arpifs/sekf/sekf_geteda_jacobians.F90)
    • Covariances between soil moisture (CV) and snow depth (OBS) are set to 0
    • Covariances between snow water equivalent (CV) and 2m temperature, relative humidity, soil moisture (OBS) are also set to 0
      • These 2 settings mean that observations to analyse each control variable are similar to the current systemsnow and soil moisture analysis are independent each other at the moment
    • Jacobians between snow water equivalent (CV) and snow depth (OBS) are set to 1/rsn (based on the relationship in the model)
  3. Analyse snow water equivalent using the analysed snow depth and Jacobians (arpifs/sekf/sm_ekf_main.F90)
    • σo=0.01 [m]
    • σb=2.0 [kg/m2] (=0.01 [m] if rsn=200 [kg/m3])
  4. So far, increments for snow water equivalent are not reflected to the analysis field (offline calculation only)

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