b.e30_alpha08b.B1850C_LTso.ne30_t232_wgx3.307

[cecilehannay]

Purpose:
302

• add the ocean mods from 304 (new runoff mapping files), and 305 (KHTR_MIN = 50) + Src Mods
• new land param files + set ndep

---

Description:
Same as 302 (#283) except:

• user_nl_clm

finidat = '/glade/campaign/cgd/tss/common/Land_Only_Simulations/CTSM54_DEV/ctsm5.4.004_bgc_ne30_130_pSASU_greenland/rest/0121-01-01-00000/ctsm5.4.004_bgc_ne30_130_pSASU_greenland.clm2.r.0121-01-01-00000.nc'

use_init_interp = .true.
reseed_dead_plants = .true.

paramfile = '/glade/work/linnia/CLM6-PPE/ctsm6_cal/paramfiles/ctsm60_params.c260204.nc'


stream_fldfilename_ndep = '/glade/derecho/scratch/tilmes/archive/b.e30_alpha07c_cesm.B1850C_MTt4s.ne30_t232_wgx3.251.001/atm/proc/fndep_clm_B1850C_MT4s.1850monthly.ne30_c251209.nc'
stream_year_first_ndep = 11
stream_year_last_ndep = 11

• add to user_nl_mom

KHTR_MIN = 50.

• sourceMods for mom

/glade/campaign/cesm/cesmdata/cseg/runs/cesm2_0/b.e30_alpha08b.B1850C_LTso.ne30_t232_wgx3.307/SourceMods/src.mom
MOM_tracer_hor_diff.F90

• chnage runoff
  reducing the radius (1000 km to 100 km for frozen and 250 km to 100 km for liquid)

./xmlchange ROF2OCN_ICE_RMAPNAME=/glade/work/gmarques/cesm/tx2_3/runoff_mapping/map_r05_to_tx2_3_nnsm_e100r100_250327.nc
./xmlchange ROF2OCN_LIQ_RMAPNAME=/glade/work/gmarques/cesm/tx2_3/runoff_mapping/map_r05_to_tx2_3_nnsm_e100r100_250327.nc

---

Case directory:

• Locally (if still available):
  /glade/campaign/cesm/cesmdata/cseg/runs/cesm2_0/b.e30_alpha08b.B1850C_LTso.ne30_t232_wgx3.302

• On github:
  https://github.com/NCAR/cesm_dev/tree/b.e30_alpha08b.B1850C_LTso.ne30_t232_wgx3.302

---

Sandbox:

• Locally (if still available): /glade/work/hannay/cesm_tags/cesm3_0_alpha08b

• On github: https://github.com/ESCOMP/cesm/tree/cesm3_0_alpha08b

---

Diagnostics:

• Diags (if available):
  https://webext.cgd.ucar.edu/BLT1850/b.e30_alpha08b.B1850C_LTso.ne30_t232_wgx3.302/

---

Output:

• Raw output on derecho (if still available): /glade/derecho/scratch/hannay/archive/b.e30_alpha08b.B1850C_LTso.ne30_t232_wgx3.302/
• CAM Climos: /glade/campaign/cgd/amp/amwg/climo/b.e30_alpha08b.B1850C_LTso.ne30_t232_wgx3.302

---

Contacts:
@cecilehannay @dlawrenncar @adamrher @PeterHjortLauritzen @JulioTBacmeister @swrneale @slevis-lmwg @wwieder @olyson @gustavo-marques @iangrooms @fobryan3 @klindsay28 @dabail10 @duvivier @tilmes @mbramberger @gunterl

---

Extra details:

[wwieder]

Land diags posted for 307 vs. 302 with climos for the last 20 overlapping years in both cases (13-32). Time series are for the full currently available period (1-32 in 307 and 1-72 in 302).

Biggest impact here are increases in boreal forest LAI, which was expected based on parameter tunings suggested.

This increases ET and decreases albedo

I'd recommend continuing this run (as well as 308, as long as there aren't any show stoppers from other analyses).

[dabail10]

Sea ice is no bueno in both hemispheres.

https://webext.cgd.ucar.edu/BLT1850/b.e30_alpha08b.B1850C_LTso.ne30_t232_wgx3.307/ice/html/infrastructure/index.html

[duvivier]

Sea ice is no bueno in both hemispheres.

https://webext.cgd.ucar.edu/BLT1850/b.e30_alpha08b.B1850C_LTso.ne30_t232_wgx3.307/ice/html/infrastructure/index.html

What happened in these? It looks like we used new runoff mapping files (not sure if it's the 100km radius or a medium radius) and KHTR_MIN (not sure what that is). Was this response in sea ice expected? If not, what else is driving this?

[wwieder]

FWIW I'm not seeing big changes in the atmospheric state in 307 vs 302 (plots above), which also suggests changes to the MOM and ROF configurations, as @duvivier noted.

[cecilehannay]

adf versus 302:
https://webext.cgd.ucar.edu/BLT1850/b.e30_alpha08b.B1850C_LTso.ne30_t232_wgx3.307/atm/

[phillips-ad]

CVDP 271/276 vs. 307/308:
https://webext.cgd.ucar.edu/BLT1850/b.e30_alpha08b.B1850C_LTso.ne30_t232_wgx3.308/cvdp/index.html

[cecilehannay]

Spaghetti for 307 and 308:

[dabail10]

Volume is still too high in both 307 and 308.

https://webext.cgd.ucar.edu/BLT1850/b.e30_alpha08b.B1850C_LTso.ne30_t232_wgx3.308/ice/html/infrastructure/index.html

[dabail10]

Will mentioned here last week that there are changes to the boreal forests. Although this lowers the albedo? So, not sure why it would make things colder over the sea ice.

Dave

Land diags posted for 307 vs. 302 with climos for the last 20 overlapping years in both cases (13-32). Time series are for the full currently available period (1-32 in 307 and 1-72 in 302).

Biggest impact here are increases in boreal forest LAI, which was expected based on parameter tunings suggested.

This increases ET and decreases albedo

I'd recommend continuing this run (as well as 308, as long as there aren't any show stoppers from other analyses).

vi

[wwieder]

I don't think the land changes that came in with 307/308 are responsible for the sea ice changes you're seeing @dabail10. I was just noting that there are land changes (compared to 302/303), and that I'm not seeing notable differences in Arctic climate over land

[adamrher]

@dabail10 you're sure that r_snw changes aren't playing a role? We can revert it to 1.0 in 308 and RESTOM would still be fairly balanced. 307 is already a bit high on RESTOM.

[dabail10]

@dabail10 you're sure that r_snw changes aren't playing a role? We can revert it to 1.0 in 308 and RESTOM would still be fairly balanced. 307 is already a bit high on RESTOM.

302 and 307 both have r_snw = 1.25. We are trying to figure out why the ice volume in 307 is so much higher in the NH. I agree that we can drop back down to 1.0 if needed.

[cecilehannay]

From Gustavo/Dave:

There are significant differences in the runoff fluxes in the Arctic between 302 and 307.
https://webext.cgd.ucar.edu/OMWG/B302_vs_B307/ts/frunoff_glc.html#arctic

The Hudson bay runoff is zero in 307 with the 100km spread.
https://webext.cgd.ucar.edu/OMWG/B302_vs_B307/ts/frunoff_glc.html#hudsonbay
This could be due to the different radius in the spreading.

[cecilehannay]

ADF 307 (yrs 81-100) vs 302 (yrs 61-80)
https://webext.cgd.ucar.edu/BLT1850/b.e30_alpha08b.B1850C_LTso.ne30_t232_wgx3.307/atm/