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how to fix aerosols at years 2000 and 1850 based on cam5.1 model

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yongxiao@...
how to fix aerosols at years 2000 and 1850 based on cam5.1 model

Dear
In order to study the impacts of aerosols, I need process a experiment fixing aerosols at years 2000 and 1850 based on cam5.1 model.but i do not know where should i modify before running this model? could you give me some suggestions?
thanks and best regards!

Yongxiao

tilmes

Hi Yongxiao,

if you want to run a transient model simulation with fixed aerosol emissions to the year 2000 or 1850, you can change the namelist (user_nl_cam) and set for example for year 2000 emissions, with this all the emissions are set to the year 2000, not only the aerosols.

ext_frc_cycle_yr               = 2000

srf_emis_cycle_yr              = 2000
ext_frc_type           = 'CYCLICAL'
srf_emis_type          = 'CYCLICAL'

Simone

yongxiao@...

Dear 

thanks for your nice guide .i am a new one of cam user , i could not find the user_nl_cam .could you tell me the root of user_nl_cam  or how to set then can make the user_nl_cam out .

best regards!

 

Yongxiao

tilmes

for basics on how to run CESM and apply simple changes I would recomment for you to attend the next CESM tutorial or look at this online:

http://www2.cesm.ucar.edu/events/tutorials/

Simone

yongxiao@...

thanks for your nice guide!

Yongxiao

yongxiao@...

dear 

thanks for your nice advice . if i  want to fix aerosols at years 2000 only other than all emissions based on cam5.1 model,how could i set?

best regards 

Yongxiao

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