Hi！
I am currently using the FHIST compset of CESM2.1.3 for simulation, with the simulation period from 1979 to 2014. I executed a hybrid run based on the default REFCASE：
1) When I used 'FLNT'+'FSNT' - 'FLNT_d1' - 'FSNT_d1' to calculate the change in net radiation flux at the top of the atmosphere caused by dust, the result I obtained is shown in the figure. The problem is that my simulation results shows consistent negative values near the Sahara Desert in Africa, rather than positive values due to high surface albedo as pointed out in other literatures:
My simulation：
Leung et al., 2024:
2) When I used 'FLNT' - 'FLNT_d1' to calculate the change in longwave radiation flux at the top of the atmosphere caused by dust, the result is shown in the figure. The problem is that most regions show negative values in my simulation, rather than the positive longwave radiative forcing caused by dust as shown in other literatures and models. I think there were some errors in my simulation:
My simulation:
I am very confused about the dust radiation effect simulated by CESM2.1.3. Can anyone provide me with some help.
Sincerely hope to get your advice.
Best wishes!
I am currently using the FHIST compset of CESM2.1.3 for simulation, with the simulation period from 1979 to 2014. I executed a hybrid run based on the default REFCASE：
I want to diagnose the radiative forcing of dust aerosols, so I edited user_nl_cam according to the user guideline (8. Physics modifications via the namelist — camdoc documentation). The modified user_nl_cam is as follows:
1) When I used 'FLNT'+'FSNT' - 'FLNT_d1' - 'FSNT_d1' to calculate the change in net radiation flux at the top of the atmosphere caused by dust, the result I obtained is shown in the figure. The problem is that my simulation results shows consistent negative values near the Sahara Desert in Africa, rather than positive values due to high surface albedo as pointed out in other literatures:
My simulation：
Leung et al., 2024:
2) When I used 'FLNT' - 'FLNT_d1' to calculate the change in longwave radiation flux at the top of the atmosphere caused by dust, the result is shown in the figure. The problem is that most regions show negative values in my simulation, rather than the positive longwave radiative forcing caused by dust as shown in other literatures and models. I think there were some errors in my simulation:
My simulation:
I am very confused about the dust radiation effect simulated by CESM2.1.3. Can anyone provide me with some help.
Sincerely hope to get your advice.
Best wishes!