Question to configure CAM5 with -chem 'NONE'

[rosh_me91@gmail_com]

Hi, im fairly new in changing chem packages in cam5Im trying to run a test with F-compset CAM5 physics package but to turn off the chempkgstarting from year 1990. I make the required changes in env_build.xml and env_run.xml.I also edited the usr_nl_cam and added prescribed_aero_model='bulk'. My question is, when i see the atm_in file, I see two kinds of groups:1) aerodep_flx_nl and prescribed_aero_nl. what is the difference between these two??  Second question is:2) prescribed_aero_file = 'aero_1.9x2.5_L26_2000clim_c091112.nc', prescribed_ozone_file          = 'ozone_1.9x2.5_L26_2000clim_c091112.nc' and aerodep_flx_file               = 'aerosoldep_monthly_1849-2006_1.9x2.5_c090803.nc'All are cyclic at 2000what does cyclic at 2000 mean? are these files 10 year climatological files from 1995-2005? If I want to start my run from year 1990, do these input datasets validate my run? If not how should I change them an check validity? Thanks in advance!Roshni   

 

[hannay]

I assume you are using the FC5 compset. This compset uses climatology that are representative for present day climate (let's call it a pseudo year 2000).
There is no consistency between the set of years used to compute the climo for the different datasets.
For instance for SSTs, it is a climo over the period 1982-2001.
For other datasets, it is another set of years or even the value of the year 2000. cyclic: means that you are cycling over the pseudo-year 2000 If you want to use data that varies from one year to the next, you should use:
FAMIPC5
instead of FC5Diffrence between and aerodep_flx_nl and prescribed_aero_nl.
The first one is for aerosol deposition, the second one is for prescribed aerosol.

 

[rosh_me91@gmail_com]

Thank you so much for all the help.I have got a hang of how to use it!  Thank you