Making preformed tracers optional to enable HR runs without them #394
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Run with preformed tracers enabled by default
jmaerz
added
enhancement
cime_config/config_component.xml
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| <default_value>TRUE</default_value> | ||
| <group>run_component_blom</group> | ||
| <file>env_run.xml</file> | ||
| <desc>Set preprocessor option to activate the preformed tracer code. Requires module ecosys</desc> |
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I suggest replacing "preprocessor" by "namelist"
| call read_netcdf_var(ncid,'prefdic',locetra(1,1,1,iprefdic),2*kpke,0,iotype) | ||
| if(lread_prefsi) then | ||
| call read_netcdf_var(ncid,'prefsilica',locetra(1,1,1,iprefsilica),2*kpke,0,iotype) | ||
| endif |
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Is there a reason why the preformed silicate is treated differently from the other preformed tracers? Does it make sense to have the capability to restart with a preformed tracer when it is not in the restart file only for silicate but not for the others? I do not see so many use cases for this so maybe we can just omit the lread_prefsi related code?
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Hi Jörg, since preformed silicate wasn't in the restart files before, start-up from restart files was an issue, hence this little quirky treatment that was put in to enable running the model from a restart file without it. Once we settle with #356 or have enough spun-up restart files with preformed silicate, this won't be an issue any longer and it can be removed. Hence, I would keep this treatment for now. We can put this clean-up task into #340 (and #356).
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@JorgSchwinger , any further comments or can I merge? |
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Please go ahead! |
@JorgSchwinger and @TomasTorsvik , as suggested in #340 , preformed tracers could be made optional to enable HR runs without them. With this PR, this is achieved, while the default is still to run iHAMOCC with preformed tracers.
@matsbn , the new introduced switch
use_pref_tracersviaxmlchange HAMOCC_PREF_TRACERS=FALSEmight be of interest for you, in the case that you want to run HR simulations including iHAMOCC, while wanting to reduce the BGC costs.