I am trying to work out what the value of TSI (sometimes referred to as the solar constant) is in some simulations. The simulations were performed with CESM 1.2.1 using the B1850C5 compset.
In the atm_in file are the following values:
&solar_inparm
solar_data_file = '/glade/p/cesmdata/cseg/inputdata/atm/cam/solar/SOLAR_SPECTRAL_Lean_1610-2008_annual_c090324.nc'
solar_data_type = 'FIXED'
solar_data_ymd = 18500101
solar_htng_spctrl_scl = .true.
The value of solar_const has not been set in user_nl_cam. This can be verified by ncdump -v sol_tsi $case.cam.h0.YYYY-MM.nc, which returns sol_tsi = -1.
If I look up the solar_data_file netCDF file and integrate (numpy.trapz) the wavelengths for 1850 (the datestamp is 1 July 1850) this returns 1361.07 Wm-2.
What I would like to know is, is that the value used in B1850 simulations with those solar_inparams and that model version? or does CESM take the temporal average of two solar cycles, which are typically 1850-1873 (See Eyring et al. 2016 doi:10.5194/gmd-9-1937-2016 pg 1951, or Otto-Bliesner et al. 2017 doi.org/10.5194/gmd-10-3979-2017 pg 3984)?
In the atm_in file are the following values:
&solar_inparm
solar_data_file = '/glade/p/cesmdata/cseg/inputdata/atm/cam/solar/SOLAR_SPECTRAL_Lean_1610-2008_annual_c090324.nc'
solar_data_type = 'FIXED'
solar_data_ymd = 18500101
solar_htng_spctrl_scl = .true.
The value of solar_const has not been set in user_nl_cam. This can be verified by ncdump -v sol_tsi $case.cam.h0.YYYY-MM.nc, which returns sol_tsi = -1.
If I look up the solar_data_file netCDF file and integrate (numpy.trapz) the wavelengths for 1850 (the datestamp is 1 July 1850) this returns 1361.07 Wm-2.
What I would like to know is, is that the value used in B1850 simulations with those solar_inparams and that model version? or does CESM take the temporal average of two solar cycles, which are typically 1850-1873 (See Eyring et al. 2016 doi:10.5194/gmd-9-1937-2016 pg 1951, or Otto-Bliesner et al. 2017 doi.org/10.5194/gmd-10-3979-2017 pg 3984)?