Run and evaluate the scientific performance of single cycle 4dvar experiments

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Sea-ice Ocean Coupled Assimilation

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Run and evaluate the scientific performance of single cycle 4dvar experiments #1095

Open kbhargava opened 4 hours ago

kbhargava commented 4 hours ago

Description

[ ] Rerun the 4dvar single cycle experiments after the inclusion of mask in RMSbyLevel and evaluate the impact with the soca ctest
[ ] Repeat the above with 1/4 degree
[ ] Test the impact of using regularization when computing the HTLM coefficients (reefer section 3a and 4b of https://doi.org/10.1175/MWR-D-20-0088.1 )
[ ] Run 4dvar with HTLM created by using climatology as the ensemble
[ ] Compare the linearization errors and 4dvar results from the above mentioned experiments

kbhargava commented 4 hours ago

For task 3 in the list, below is a plot showing the impact of regularization, which penalizes the impact of the ensemble part of HTLM, on the linearization errors of salinity. Similar results are observed for temperature with no changes in u, v, and h. In this small ensemble, low-resolution ocean, it looks like the information that the ensemble brings is crucial and doesn't need to be penalized. HTLM-results