Zero dust deposition flux from CAM4 to CLM4 in CESM1.2.2 run with prog dust

[wadewei]

Hi all,

I am trying to run a few CESM1.2.2 runs to examine the effect of dust in a paleoclimate scenerio. I set "CAM_CONFIG_OPTS" to "-phys cam4 -prog_species DST" and included modifications per Albani 2014.

While DST01DD to DST04DD, DSTSFDRY and DSTSFWET have reasonable values, DF_DST01-04, a2xDSTDRY1-4 and a2xDSTWET1-4 are all zeros. The dust mass in snow in CLM is also zero. I assume the dust-in-snow effect is then totally non-existent.

This seems pretty puzzling. Can somebody elaborate what might have gone wrong? I can share config files and output if needed.

Thanks a lot!!

Qiang

 

[wadewei]

Correct: The dust mass in snow in CLM (SNODSTMCL) is not zero. Rather, it's very small despite larger dust loading and deposition, compared to prescribed dust experiment (basically default F1850 compset).

 

[Danny Leung]

Hi Wade--
Hmm, I am not very proficient in CESM1.2 which is an older version... My only suggestion would be to check if the cam4 namelist variable aerodep_flx_specifier has the deposition fields you want. Not sure if that helps though.
I am not sure about the difference between DST01DD, DF_DST01 and a2x_DSTDRY1... by looking at the history fields I feel like they are similar things.
It might be helpful to contact Samuel Albani or Natalie Mahowald.
And, it might be easier to work on later CESM2 versions? I think NCAR labs mostly support CESM2 now.
Danny