Changes between Version 65 and Version 66 of Documentation/UserGuide/PreIndSim


Ignore:
Timestamp:
2015-04-22T11:00:41+02:00 (9 years ago)
Author:
luyssaert
Comment:

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  • Documentation/UserGuide/PreIndSim

    v65 v66  
    2525 (1) We now have to set-up the job to create files for the boundary conditions (BC) for the years 1751 to 1780 but we have no driver files for these years so we use the earliest years available. That varies from data stream to data stream so we used a creative solution. We are limited, for example by the SST and sea ice files that only go back until 1870. So we assume that the SST in 1870 represents pre-industrial conditions.  
    2626 
    27 Open '''.../libIGCM/libIGCM_config/libIGCM_config.tsh''' and search for the phrase '# BEGIN: SHOULD GO IN A FUNCTION FROM libIGCM_date.ksh'. Then add:  
     27Open '''.../libIGCM/libIGCM_config/libIGCM_config.ksh''' and search for the phrase '# BEGIN: SHOULD GO IN A FUNCTION FROM libIGCM_date.ksh'. Then add:  
    2828{{{ 
    2929# BEGIN: SHOULD GO IN A FUNCTION FROM libIGCM_date.ksh 
     
    344344Annee_${year_preind} 
    345345}}} 
    346 This is necessary because these files start in 1765 but we want to make a simulation that is assigned to the year 1751. We defined the variable 'year_preind' ourselves in libigcm_config.tsh (see above) 
     346This is necessary because these files start in 1765 but we want to make a simulation that is assigned to the year 1751. We defined the variable 'year_preind' ourselves in libigcm_config.ksh (see above) 
    347347 
    348348=== Alternative to changing the years === 
    349 Rather than changing the years in '''.../libIGCM/libIGCM_config/libIGCM_config.tsh''', and several of the DRIVER and COMP files it is also possible to adjust the data files and more specificaly all the *.txt files as those contain only one value per year. The files SOLARANDVOLCANOES_1610_2008.txt, CO2_1765_2005.txt, CH4_1765_2005.txt, N2O_1765_2005.txt, CFC11_1765_2005.txt, and CFC12_1765_2005.txt are all write protected so you have to copy them before you can change the content. For an equilibrium experiment it could be wise to set the same value for all the years in the experiment. This way, equilibrium will be reached faster. If you use this approach remember to change the paths in COMP/lmdz.card such that it uses your copied and adjusted files. 
     349Rather than changing the years in '''.../libIGCM/libIGCM_config/libIGCM_config.ksh''', and several of the DRIVER and COMP files it is also possible to adjust the data files and more specificaly all the *.txt files as those contain only one value per year. The files SOLARANDVOLCANOES_1610_2008.txt, CO2_1765_2005.txt, CH4_1765_2005.txt, N2O_1765_2005.txt, CFC11_1765_2005.txt, and CFC12_1765_2005.txt are all write protected so you have to copy them before you can change the content. For an equilibrium experiment it could be wise to set the same value for all the years in the experiment. This way, equilibrium will be reached faster. If you use this approach remember to change the paths in COMP/lmdz.card such that it uses your copied and adjusted files. 
    350350   
    351351