This page shows how to set up an offline land analysis experiment by prepIFS based on CY48R1 by prepIFS (including snow depth analysis).
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You will change executing host to run your experiment at on Atos.
Change each setting for your own experiment
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- You can change settings for offline land surface model. In this case, horizontal resolution and time step are changed to the same as the seasonal prediction system.
- In the default settings, atmospheric forcing is retrieved from ERA5.
- 'FREQ_PP_OSM' must be set to 1 if you set up an offline land analysis experiment.
- ’ACCOUNT’ must be filled depending on your account. In this case, it is set to 'ecrdasca' which corresponds to coupled assimilation team.
- In case you don't need to build double precision modules, you can set 'LIFS_BUILD_DP' to Off.
- If you run an experiment at higher resolution, you might have to change NPES_FC and THREADS_FC. NPES_FC=1 is enough for TCo319 experiment.
- If you would like to change horizontal resolution, the following page will be useful: Old documentation of Offline ECLand simulations
- You can change default precision settings at 'Numerical precision'.
- You can change settings for offline land analysis here.
- LSEKF_SM: activate soil moisture analysis
- LSEKF_SD: activate snow depth analysis
- LMONTHLY_ARCH: In order to avoid high load on MARS by archiving output frequently, it is better to set it On. This is used for offline land analysis experiment only.
- LSAVE_SEKF: To save the SEKF output in ECFS, including increments, innovations and Kalman gains, select LSAVE_SEKF to "ON"
Lastly, you will click 'Submit experiment type' and set up your own experiment. You can check the experiment status by ecFlow.