Changes between Version 15 and Version 16 of 2018WP/VALID-12_CLEVY_Coupled Interface


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Timestamp:
2018-11-30T12:48:45+01:00 (22 months ago)
Author:
clevy
Comment:

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  • 2018WP/VALID-12_CLEVY_Coupled Interface

    v15 v16  
    7575'''The ORCA2_SAS_LIM configuration is running in NEMO 4.0, e.g. the SAS interface is functionnal in this case.'''[[BR]][[BR]] 
    7676''Comments on forced reference configuration ORCA2_ICE_PISCES : [[BR]] 
    77 The reference configuration is set up to start from rest (e.g. the very initial start, no ocean restart at all). In this case, using a call frequency of the ice =3 , nn_fsbc=3, is unstable: the run crashes after a few tenth of timesteps. Using nn_fsbc=5 (e.g. ice called every 5 timesteps, inducing less high frequencies in the forcing since the mean value used is calculated on a longer time scale), the model runs fine. This instabilities was not expected in the ORCA2 configuration, usually considered as very stable. Still this nn_fsbc=5 values has always been used up to now... '' 
     77The reference configuration is set up to start from rest (e.g. the very initial start, no ocean restart at all). In this case, using a call frequency of the ice =3 , nn_fsbc=3, is unstable: the run crashes after a few tenth of timesteps. Using nn_fsbc=5 (e.g. ice called every 5 timesteps, inducing less high frequencies in the forcing since the mean value used is calculated on a longer time scale), the model runs fine. This instabilities was not expected in the ORCA2 configuration, usually considered as very stable. Still this nn_fsbc=5 values has always been used up to now... [[BR]] 
     78Once the ocean has started, after a few years, it seems that the nn_fsbc=3 option is indeed stable enough.[[BR]]'' 
    7879 
    7980=== TEST2: Set up a test using NEMO (starting from the global reference configuration) with key_coupled, OASIS active and a toy atmospheric model[[BR]] 
    8081Using this configuration, check that the coupled interface is functional for ocean dynamics, sea ice and biogeochemistry [[BR]] 
     82* OASIS3-MCT version is installed, revision xxx 
     83* a CPL_TOYATM configuration is created, based on ORCA2_ICE_PISCES, and with oasis cpp keys key_oasis3 key_oa3mct_v3 active is created 
     84* First compilation problem, requests a fix in oasis for now (see attached file in the ticket #2147 ) 
     85* The toyatm developped by Eric Maisonnave is compiled as a simple toy for the atmosphere 
     86* iodef.xml modified for OASIS use 
     87* the number of (fake) fields is adjusted in the namcouple and namelist_cfg files 
     88* Coupling frqequence is set to 1 (every time steps) 
     89* Test is short (5 timesteps, since the atmspheric fields are constant in space and time and not realistic) 
     90* The run is completed 
     91 
     92Validation: the NETCDF file of SST seen by the toy atmosphere looks reasonable.[[BR]][[BR]] 
     93'''The global 2° configuration in a very simple coupled mode using OASIS is running fine with NEMO 4.0, e.g. the OASIS interface between ocean dynamics, sea ice and atmosphere is functionnal.'''[[BR]][[BR]] 
    8194 
    8295=== Summary