f.cam6_3_132.FCLTHIST_ne30.001

[tilmes]

Description:
same as f.cam6_3_132.FLTHIST_ne30.001 #417 but with chemistry

---

Case directory:

• Locally (if still available):
  /glade/p/cesmdata/cseg/runs/cesm2_0/f.cam6_3_132.FCLTHIST_ne30.001

• On github:
  https://github.com/NCAR/amwg_dev/tree/f.cam6_3_132.FCLTHIST_ne30.001

---

Sandbox:

• Locally (if still available):
  /glade/work/pel/cesm_tags/cam6_3_132/

---

Diagnostics:
-AMWG 1996-2004:
https://acomstaff.acom.ucar.edu/tilmes/amwg/cam7/f.cam6_3_132.FCLTHIST_ne30.001.1996_2004-f.cam6_3_132.FLTHIST_ne30.001.1996_2005/
https://acomstaff.acom.ucar.edu/tilmes/amwg/cam7/f.cam6_3_132.FCLTHIST_ne30.001-obs.1996_2004/

• ADF diags (if available)
  https://webext.cgd.ucar.edu/FLTHIST/f.cam6_3_132.FCLTHIST_ne30.001/atm/

---

Output:

• Raw output on derecho (if still available)
  /glade/scratch/tilmes/archive/f.cam6_3_132.FCLTHIST_ne30.001/
• CAM Climos: /glade/campaign/cgd/amp/amwg/climo/f.cam6_3_132.FCLTHIST_ne30.001

---

Contacts:
@tilmes

---

Extra details:

Needed to adjust some namelist variables to the FCLT compset to agree with the FLTHIST version.

[tilmes]

@cecilehannay I am not sure how to change the label to the chemistry label

[tilmes]

@PeterHjortLauritzen @adamrher This run has been done for 10 years, so we may want to ask Justin to run the diagnostics.
I noticed that the default IC file had been incorrect for GHGs and CO2 in 23km describes an initial decline. So, we may want to ignore the first 5 years of the run. I will continue this for longer (also till 2010, so we have 10 years to compare with the no-chemistry run.

[adamrher]

My understanding is that if CO2 is not in the ncdata file, then it initializes the whole column to the lbc value at t=0. It sounds like that isn't all that consistent with the "equilibrated" solution, and that we should strive to provide "equilibrated" GHGs in the inic.

[tilmes]

@adamrher the initial condition file was probably from a case closer to present day (that is why we have the higher CO2). However, I think, ignoring the first 5 years is fine for our purpose here running with fixed SSTs. We need to next time make sure next time to use a CO2 closer to 1996.

[justin-richling]

I ran a test ADF on Derecho. Here are diags for this case vs f.cam6_3_132.FLTHIST_ne30.001 ( #417 ) :

https://webext.cgd.ucar.edu/FLTHIST/f.cam6_3_132.FCLTHIST_ne30.001/atm/

[tilmes]

Thanks, could you also do the tape recorder? I noticed that it is wetter with chemistry.

[justin-richling]

[justin-richling]

@tilmes I just saw your comment about ignoring the first 5 years, here is the tape recorder for 1999-2006

[tilmes]

@justin-richling I have 5 more years of the run, could you redo the ADF comparing 2000-2011 for both cases, with and without chemistry?

[justin-richling]

@tilmes Here are the updated ADF diags: https://webext.cgd.ucar.edu/FLTHIST/f.cam6_3_132.FCLTHIST_ne30.001/atm/f.cam6_3_132.FCLTHIST_ne30.001_2000_2011_vs_f.cam6_3_132.FLTHIST_ne30.001_2000_2011/

Tape recorder:

[tilmes]

@adamrher @PeterHjortLauritzen We seem to have a more wet tape recorder with chemistry. I checked the ADF, and we also seem to have less cloud ice in the chemistry run, and changes in temperatures at the tropopause, resulting in more water vapor in the stratosphere. I checked the namelist and saw, that the no chemistry run, did not include the aircraft emissions, so that could make a difference. I thought we had agreed on to include aircraft emissions in CAM? In any case, we should probably rerun the FLTHIST case with aircraft emissions to see if that makes a difference and also adjust the run, to improve the water vapor. Besides, I am seeing some strengthening of the polar vortex with the full chemistry, which makes sense since the colder polar vortex in the SH is resulting in more ozone loss and more cooling.

[tilmes]

New diagnostics 2000-2009:
https://acomstaff.acom.ucar.edu/tilmes/amwg/cam7/f.cam6_3_132.FCLTHIST_ne30.001.2000_2009-f.cam6_3_132.FLTHIST_ne30.001.2000_2009/
https://acomstaff.acom.ucar.edu/tilmes/amwg/cam7/f.cam6_3_132.FCLTHIST_ne30.001-obs.2000_2009/