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- Similar pattern is seen between the analysis increments for SWE in (1) the 2D-OI and (2) the SEKF.
- Note that large differences are seen in some regions due to inconsistency of snow density between the 2D-OI analysis and trajectory (lower limit of 100kg/m3 in the 2D-OI but 50kg/m3 in the model).
- When SWE from the 2D-OI is assimilated directly in the SEKF (3), such differences are not seen.
- (The trial branch: dako_CY48R1.1_SEKF_tmp)
- This will be not an issue in the future when snow depth observations are assimilated directly in the SEKF
| sekf_inc_l1.grib(SM1) | sekf_inc_l2.grib(SM2) | sekf_inc_l3.grib(SM3) | |
|---|---|---|---|
Cntl (hzx1) |
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Test (i5eq) |
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- Analysis increments for soil moisture are the same (bit-identical) between before and after the changes.
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- Input snow observations directly in the SEKF (similar work as soil moisture analysis using analysed 2m temperature and relative humidity)Need to implement a localization in observation space
- Each QC also should be implemented in the SEKF
- Consider flow-dependent background errorsÂ
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