solar constant in SCAM6

[Hoback]

I changed the solar constant and got the opposite of what what expected.
Original code in radconstants.f90 (/rrtng):

! Solar irradiance at 1 A.U. in W/m^2 assumed by radiation code
! Rescaled so that sum is precisely 1368.22 and fractional amounts sum to 1.0
real(r8), parameter :: solar_ref_band_irradiance(nbndsw) = &
(/ &
12.11_r8, 20.3600000000001_r8, 23.73_r8, &
22.43_r8, 55.63_r8, 102.93_r8, 24.29_r8, &
345.74_r8, 218.19_r8, 347.20_r8, &
129.49_r8, 50.15_r8, 3.08_r8, 12.89_r8 &
/)

My code has half the solar constant:

! Solar irradiance at 1 A.U. in W/m^2 assumed by radiation code
! Rescaled so that sum is precisely 1368.22/2 *** and fractional amounts sum to 1.0
real(r8), parameter :: solar_ref_band_irradiance(nbndsw) = &
(/ &
6.05_r8, 10.1800000000001_r8, 11.85_r8, &
11.22_r8, 27.81_r8, 51.47_r8, 12.15_r8, &
172.9_r8, 109.10_r8, 173.60_r8, &
64.75_r8, 25.08_r8, 1.54_r8, 6.45_r8 &
/)

The result that I got from SCAM6 ARM97 was that temperatures in the bottom level increased by about 10C. it took 48 hours to converge to the new temperatures.
These were my only code changes in that run. I ran the tutorial iop with only my new f90 code in the mods directory. See attached files. (The NetCDF for temperatures is too large to post.)

FYI. I don't intend to modify the solar constant, but I was trying to figure out why I was getting odd results for the changes I made in a different run.

 

[Hoback]

Today I also performed a run with doubling the solar constant. Again, I got the opposite of expected. The temperatures dropped by about 10C in a couple days.

 

[Hoback]

I see that the solar insolation is also an input through the ARM 97 netCDF file. (TOA insol).
Here's a thought: If the solar heating is found from the IOP file, but another reactive phenomena is found from the solar_ref_band_irradiance in the F90 file, then the two may produce the opposite overall result than expected. For example, if evaporation were found from solar_ref_band_irradiance, then lower insolation is lower cloud cover which causes higher temperatures.