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SETTING UP A SIMPLE TRACER RUN

Setting up a CAM-chem run with constant-year emissions and oxidants prescribed Using the simple chemistry in CAM and prescribing oxidants from a previous full chemistry run , to study the effect of variable enables sensitivity tests of different processes, such as using constant emissions with changing dynamics.

(1) Create input

Save constant-year fields from a full-chemistry run: O3, OH, NO3, HO2. Also, save the chemically produced CO and MEGAN emissions from the full chemistry run. Create an Use netCDF operator to create a single year oxidants file from the history files of a fullchem run by using netCDF operatorsfull chemistry run.

Code Block
languagetext
> ncrcat -v date,datesec,P0,PS,hyam,hybm,hyai,hybi,OH,O3,HO2,NO3,CO_CHMP,MEG_CO *h0*2005* oxidants_2005.nc
> mv oxidants_2005.nc /glade/p/work/${USER}/emis/prescribed_fields

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Required compset with specified dynamics: FSDBAMFHIST

Set-up and build model as usual to get the default chemical mechanism.

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