Diagnostic changes with AEROCOM

[mvertens]

In the prototype version of noresm2_5_alpha04 - I have added aerocom output to see that it works and have noticed that the following fields are changed in the history file:

 RMS ABSVIS                           5.1694E-04            NORMALIZED  2.3163E+00
 RMS AODVIS                           2.9752E-02            NORMALIZED  1.4307E+00
 RMS DAYFOC                           6.7073E-01            NORMALIZED  8.9431E-01
 RMS FSDSCDRF                         4.2285E+02            NORMALIZED  3.2247E+00
 RMS FSDS_DRF                         3.6614E+02            NORMALIZED  3.3416E+00
 RMS FSUS_DRF                         7.3975E+01            NORMALIZED  5.3834E+00
 RMS FSUTADRF                         1.4662E+02            NORMALIZED  3.5566E+00
 RMS ASYMMVIS                         4.9924E-01            NORMALIZED  8.8728E-01
 RMS EXTVIS                           1.5495E-02            NORMALIZED  4.2806E+00
 RMS SSAVIS                           6.5473E-01            NORMALIZED  8.8995E-01

There are not aerocom specific additional fields.
I believe that the reason for this is the following if-block in oslo_aero_optical_params.F90

    if (use_aerocom) then
       ! always calculate optics (also at (polar) night)
       do icol=1,ncol
          daylight(icol) = .true.
       end do
    else
       ! calculate optics only in daytime
       do icol=1,ncol
          if (coszrs(icol) > 0.0_r8) then
             daylight(icol) = .true.
          else
             daylight(icol) = .false.
          endif
       end do
    end if

@oyvindseland @DirkOlivie - is this expected behavior?

[oyvindseland]

Yes this is expected behavior although I think it is easier to check if you show the mean values of those variables.

However, I think the block you point to should be separated from with its own namelist setting and not together with Aerocom.

[mvertens]

@oyvindseland - introducing a new namelist is fine. What name would you suggest?

[oyvindseland]

A bit long but optaer_night should be relatively clear I think.

[mvertens]

@oyvindseland - can you please raise an issue on OSLO_AERO with this suggestion.

[oyvindseland]

Will do