f.cam6_3_117.FLTHIST_ne30.r250.slowsnow.001

[cecilehannay]

Description:

• vtrmi_factor reduces the fall velocity of ice, small ice and snow at the same time.
• Same as #324 but just lower snow fall speed by a factor 0.5 (using SourceMods).

Detailed description: This simulation is part of the set of runs described in the discussion #325. It uses:

• latest cam tag:

  f.cam6_3_117

• new hb mods:

  /glade/u/home/pel/src/for-hb-nohack-freeatm_hb-cam6_3_110/clubb_intr.F90
  /glade/u/home/pel/src/for-hb-nohack-freeatm_hb-cam6_3_110/vertical_diffusion.F90
  /glade/u/home/pel/src/for-hb-nohack-freeatm_hb-cam6_3_110/hb_diff.F90

• mods to lower ice fall speed by a factor 0.5

  /glade/u/home/aherring/src/cam6_3_115/usr_src/slow_snow/micro_pumas_v1.F90

• tuning:

  
  clubb_gamma_coef = 0.27
  clubb_gamma_coefb = 0.32

micro_mg_dcs = 500.D-6 micro_mg_vtrmi_factor = 1.0 microp_aero_wsubi_scale = 1.0

**Case directory:**
Locally (if still available):
/glade/p/cesmdata/cseg/runs/cesm2_0/f.cam6_3_117.FLTHIST_ne30.r250.slowsnow.001

On github:
https://github.com/NCAR/amwg_dev/tree/f.cam6_3_117.FLTHIST_ne30.r250.slowsnow.001

**Sandbox:**
Locally (if still available):
/glade/work/hannay/cesm_tags/cam6_3_117

On github:
(https://github.com/ESCOMP/CAM/tree/cam6_3_117)

**Diagnostics:**
ADF diags (if available)
[https://webext.cgd.ucar.edu/FLTHIST/f.cam6_3_117.FLTHIST_ne30.r250.slowsnow.001/atm/](https://webext.cgd.ucar.edu/FLTHIST/f.cam6_3_117.FLTHIST_ne30.r250.slowsnow.001/atm/)

**Contacts:**
@adamrher @JulioTBacmeister @PeterHjortLauritzen @cbardeen @cecilehannay

**Note:**
Note that this run is done on **derecho**. It can be accessed from **casper**. /glade/derecho/scratch/hannay/archive/

[justin-richling]

ADF diags vs f.cam6_3_117.FLTHIST_ne30.r250.001

[adamrher]

Anyone know how to make sense of how slowing down the snow fall velocities leads to a reduction CLDICE?