Solar cycle in F1850W component set

[deepashree_dutta@student_unsw_edu_au]

Hi all,

I'm using F1850W compset and the Component Sets Definition shows CAM WACCM with daily solar data and SPEs.
Does this mean the solar cycle is active in WACCM4 in F1850W compset?

When I checked the atm_in file for the case, in the solar_data_file (~/CESM/inputdata/atm/cam/solar/spectral_irradiance_Lean_1850_cntl_c100407.nc) and solar_parms_file (~/CESM/inputdata/atm/waccm/phot/wasolar_ave.nc) I just see just 2 time steps and solar_data_type is FIXED. These are the details I could find about solar variables in the case:

solar_parms_file = '~/CESM/inputdata/atm/waccm/phot/wasolar_ave.nc'
&solar_inparm
solar_data_file = '~/CESM/inputdata/atm/cam/solar/spectral_irradiance_Lean_1850_cntl_c100407.nc'
solar_data_type = 'FIXED'
solar_data_ymd = 18500101
solar_htng_spctrl_scl = .true.

Can anyone please explain what does this mean in terms of solar cycle?
Thanks a lot in advance!

Deepashree

 

[mmills]

F1850W is a compset for fixed pre-industrial anthropogenic and natural forcings. Therefore, it does not have a solar cycle. The solar irradiance and other solar parameters are set to average values representative of the decades before and after 1850, as described in the metadata of those files.

For example:

ncdump -h ~/inputdata/atm/cam/solar/spectral_irradiance_Lean_1850_cntl_c100407.nc

reveals this in the notes section:

"Reference spectral and total irradiances derived from average over years 1834-1867 (solar cycles 8-10)"

 

[deepashree_dutta@student_unsw_edu_au]

Thanks a lot Mike!