CAM5.4

Testing changes candidates for CAM5.4


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List of changes

Robust changes

Changes in testing

Still in development

Standalone Simulations

These simulations are simulations in which we look at the proposed change for CAM5.4 one at a time.

ID Casename Case Description Diagnostics Details/Comments
C1 f.e13.F2000C5.f09_f09.cam5.3.50.control.001
Baseline run : Out-of-the-box from cam5.3.50
w/ obs
w/ cam5.3

Timing:

Model Cost:
1135 pe-hrs/yr

Throughput:
10.83 yrs/day

C2 f.e13.F2000C5.f09_f09.cam5.3.50.topo.001
Same as C1
+ new topo
w/ obs
w/ C1

 

C3 f.e13.F2000C5.f09_f09.cam5.3.50.dust_erod.001
Same as C1
+ new file for dust erodability
dst_source2x2tuned_cam5merra_30jul13.nc
w/ obs
w/ C1
C3b f.e13.F2000C5.f09_f09.cam5.3.50.dust_erod.002
Same as C1
+ new file for dust for dust erodability
dst_source2x2tuned_cam5merra_30jul13.nc
+ fine mode from 3.2% to 1.1% (Albani et al., 2014)

w/ obs
w/ C1
w/ C3

C3c f.e13.F2000C5.f09_f09.cam5.3.50.dust_erod.003
Same as C1
+ new file for dust for dust erodability
dst_source2x2tuned_cam5merra_30jul13.nc
+ fine mode from 3.2% to 1.1% (Albani et al., 2014)
+ new optical properties

w/ obs
w/ C1
w/ C3b

C3d f.e13.F2000C5.f09_f09.cam5.3.50.dust_erod.004
Same as C1
+ new file for dust for dust erodability
dst_source2x2tuned_cam5merra_30jul13.nc
+ fine mode from 3.2% to 1.1% (Albani et al., 2014)
+ new optical properties

w/ obs
w/ C1

C4 f.e13.F2000C5.f09_f09.cam5.3.51.mg2.001

Same as C1
+ MG2 microphysics
+ rhminl = 0.95

w/ obs
w/ C1

Model Cost:
1270 pe-hrs/yr

Increase cost: 12%

C4b f.e13.F2000C5.f09_f09.cam5.3.51.mg2.001

Same as C1
+ MG2 microphysics
+ rhminl = 0.95
+micro_mg_num_steps = 4

w/ obs
w/ C1

Model Cost:
1313 pe-hrs/yr

Increase cost: 16%

C5 f.e13.F2000C5.f09_f09.cam5.3.51.ice_nucleation.001
Same as C1
+ new ice nucleation
w/ obs
w/ C1

Model Cost:
1212 pe-hrs/yr

Increase cost: 7%

C5b f.e13.F2000C5.f09_f09.cam5.3.51.ice_nucleation.002
Same as C1
+ new ice nucleation
+  "DHmax" = 400 microns (based on the Radar observations)
w/ obs
w/ C1
w/ C5

 

C5c f.e13.F2000C5.f09_f09.cam5.3.51.ice_nucleation.005
Same as C1
+ new ice nucleation
+  "DHmax" = 400 microns (based on the Radar observations)
+ -cppdefs -DUSE_XLIU_MOD'
w/ C5b

 

C6 f.e13.F2000C5.f09_f09.cam5.3.50.L32.002
Same as C1
+ 32 vertical levels
w/ obs
w/ C1

Model Cost
1180 pe-hrs/yr

Increase cost: 4%

C7 f.e13.F2000C5.f09_f09.cam5.3.50.mam4.001
Same as C1
+ MAM4
w/ obs
w/ C1

Model Cost:
1257 pe-hrs/yr

Increase cost: 11%

C7b f.e13.F2000C5.f09_f09.cam5.3.50.mam4.002
Same as C1
+ MAM4
+ new optical properties
w/ obs
w/ C1

 

C8 f.e11.FAMIPC5.f09_f09.cam5_3_52_new_energy.001
Same as C1 but AMIP
+ new energy formulation
w/ C1-AMIP

 

C8b f.e11.FAMIPC5.ne30_ne30.cam5_3_52_new_energy.001
Same as C1 but AMIP
+ new energy formulation
+ Spectral element
w/ C1-AMIP

 

C9 f.e13.F2000C5.f09_f09.cam5.3.50.remapping.001
Same as C1
+ new remapping
w/ C1

 

C10 f.e13.FC5.f09_f09.mjmc5367.004.modeopt
MAM mode width changes (to enable prognostics sulfur)
w/ control

 

C11 f.e13.c5370.FC5.f19_f19.test.01
making H2O prognostic in the chemistry
w/ control

 



Combined standalone Simulations

This is the first attempt to combine changes for CAM5.4

ID Casename Case Description Diagnostics Details/Comments
M1 f.e13.F2000C5.f09_f09.cam5.4_alpha02.001
Combined the changes

  • New topography for fininite volume (see C2)
  • Modifications to the dust (see C3d)
    New file for dust erodability + fine mode from 3.2% to 1.1% (Albani et al., 2014) + new optical properties
  • MG2 microphysics (see C4 and C4b)
  • New ice nucleation (see C5)
  • MAM4 (see C7b)
  • New energy formulation (C8)
  • New remapping (C9)

w/ obs
w/ cam5.3

w/ C1 (trunk head)


M2 f.e13.F2000C5.f09_f09.cam5.4_alpha02.001_L32
Same as M1
  • 32-level model (see C6)

w/ obs
w/ cam5.3
w/ M1

w/ C1 (trunk head)

namelist

M3 f.e13.F2000C5.f09_f09.cam5.4_alpha02.001_L32
Same as M1
  • 32-level model (see C6)

w/ obs
w/ cam5.3
w/ M1

w/ C1 (trunk head)

namelist


CAM5.4

Standalone, AMIP and coupled runs with CAM5.4 (coupled runs includes some retunings to adjust the RESTOM)

ID Casename Case Description Diagnostics Details/Comments
2000_V1 f.e13.F2000C5.f09_f09_beta16.cam5.4_alpha02_b.003
Same as M2 (combined change)
+ rhminl_land = 0.01->0.

w/ obs
w/ cam5.3


AMIP_V1 f.e13.FAMIPC5.f09_f09_beta16.cam5.4_alpha02_b.002
Same as M2 (combined change)
+ rhminl_land = 0.01->0.

w/ obs
w/ cam5.3

AMWG variab

 

COUPLED_V1 b.e13.B1850C5CN.f09_g16.beta16.cam5.4_alpha02_b.003

Same as M2 (combined change)
+ rhminl_land = 0.01->0.
+ dp1 = 0.1->0.05

timeseries
w/ obs
w/ LENS

CVDP

 


Sensitivity tests and tuning runs

Sensitivity to tuning parameters that could be used for CAM5.4

ID Casename Case Description Diagnostics Details/Comments
S1 f.e13.F2000C5.f09_f09.
cam5.4_alpha02.001_L32_rhminl_land
rhminl_land = 0.01->0.

w/ control


S2 f.e13.F2000C5.f09_f09.
cam5.3.51.ice_nucleation.002
Same as Control
+ new ice nucleation
+  "DHmax" = 400 microns (based on the Radar observations)
w/ Control

 

S3 f.e13.F2000C5.f09_f09.
cam5.3.51.ice_nucleation.003
Same as S2
+  "DHmax" = 350 microns (based on the Radar observations)
w/ S2

 

S4 f.e13.F2000C5.f09_f09.
cam5.3.51.ice_nucleation.004
Same as S2
+  "DHmax" = 450 microns (based on the Radar observations)
w/ S2

 

S5 f.e13.F2000C5.f09_f09
_beta16.cam5.4_alpha02_b.004
Same as control
+ c0_land
w/ Control

 

S6 f.e13.F2000C5.f09_f09_
beta16.cam5.4_alpha02_b.005
Same as control
+ dp1
w/ Control

 

S7 f.e13.F2000C5.f09_f09_
beta16.cam5.4_alpha02_b.006
Same as control
+ cu_det_st = .true.
w/ Control

 

S8 b.e13.B1850C5CN.f09_g16_
beta17_cam5.4_alpha03.003

Same as control
dp1= 0.1->0.05

w/ control

 
S9 b.e13.B1850C5CN.f09_g16_
beta17_cam5.4_alpha03.005
Same as control
dcs = 150->300 microns

w/ control

 
S10 b.e13.B1850C5CN.f09_g16_
beta17_cam5.4_alpha03.007

Same as control
dcs = 150->300 microns

w/ control

 
S11 b.e13.B1850C5CN.f09_g16_
beta17_cam5.4_alpha03.005

Same as control
subgrid =1.->1.2

w/ control

 

Tracking differences in LWCF

There is a 1 W/m2 difference in LWCF between
- CAM5.4 in cam5_3_52 (this is where the changes for CAM5.4 were implemented and tested)
- CAM5.4 in cam5_3_67 (this is when the changes for CAM5.4 went on the trunk)
I suspect this is coming from the MG2 bugfix in cam5_3_57 (Yes it is !!!)

ID Casename Case Description Diagnostics Details/Comments
L1 f.e13.F2000C5.f09_f09_beta16.cam5.4_alpha02_b.003
cam5_3_52



L2 f.e13.F2000C5.f09_f09_beta16.cam5.4_mills01_cam5_3_70.002
cam5_3_70

w/ cam5_3_52


L3 f.e13.F2000C5.f09_f09_cam5.4_cam5_3_66_energy_new_mods.001
cam5_3_67

w/ cam5_3_52
w/ cam5_3_70


L4 f.e13.F2000C5.f09_f09_cam5.4_cam5_3_57.001.001
cam5_3_57

w/ cam5_3_52
w/ cam5_3_70


L5 f.e13.F2000C5.f09_f09_cam5.4_cam5_3_56.001.002
cam5_3_56

w/ cam5_3_52
w/ cam5_3_70


L6 f.e13.F2000C5.f09_f09_cam5.4_cam5_3_52.001.001
cam5_3_52

w/ cam5_3_52
w/ cam5_3_70


 

Change in mode width

Change in the mode widths has a big impact on the dust.
The dust is retuned by changing the soil erodibility.

ID Casename Case Description AMWG diag Aerosol diags
W2 f.e13.F2000C5.f09_f09_beta16.
cam5.4_mills01_cam5_3_70.002
Control

w/ obs
w/ 2000_V1

w/ 1850 aerosol

w/ 1850 aerosol

W3 f.e13.F2000C5.f09_f09_beta16.
cam5.4_mills01_cam5_3_70.003
Mode width changes w/ obs
w/ W2

w/ W2
(no width change)

W4 f.e13.F2000C5.f09_f09_beta16.
cam5.4_mills01_cam5_3_70.004
Mode width changes
modal_accum_coarse_exch=.true.
(exchange between accumulation and coarse modes
in the stratosphere).

w/ obs
w/ W2
w/ W3

w/ 1850 aerosol

w/ 1850 aerosol

w/ W2
(no width change)

W5 f.e13.F2000C5.f09_f09_beta16.
cam5.4_mills01_cam5_3_70.005
Same as W4
+ Tuning of the dust : new erodibility file

w/ obs
w/ W2
w/ W4

w/ 1850 aerosol

w/ 1850 aerosol

w/ W2
(no width change)


w/ W4

W6 f.e13.F2000C5.f09_f09_beta16.
cam5.4_mills01_cam5_3_70.006
Same as W5
+ Bugfix from Mike Mills

w/ obs
w/ W5

w/ W5

W8 f.e13.F2000C5.f09_f09_beta16.
cam5.4_mills01_cam5_3_70.008
Same as W6
+ Mods for RHMAX
(same mods as in C5b)

w/ obs
w/ W6

w/ W6

W9 f.e13.F2000C5.f09_f09_beta16.
cam5.4_mills01_cam5_3_70.009

Same as W5
+ change in the sea-salt emission
emis_scale = 1.35->1

w/ obs
w/ W5

w/ W5

W10 f.e13.F2000C5.f09_f09_beta16.
cam5.4_mills01_cam5_3_70.010
Same as W6
+ Bugfix from Mike Mills
+ limit mode exchange to statrosphere

w/ obs
w/ W5
w/ W6

w/ W5
w/ W6

W11 f.e13.F2000C5.f09_f09_beta16.
cam5.4_mills01_cam5_3_70.011

Same as W10
+ emis_scale = 1.->0.9
+ Mods for RHMAX
and -cppdefs -DUSE_XLIU_MOD'
(same mods as in C5c)
+ new soil erodibilty file: dst_source2x2_cam5.4_c150327.nc

w/ obs
w/ W10

w/ cam5.3

w/ w5


Tuning of W11 in coupled mode

We identified w11 as a good candidate for CAM5.4.

ID Casename Case Description AMWG diag Aerosol diags
W11 f.e13.F2000C5.f09_f09_beta16.
cam5.4_mills01_cam5_3_70.011

Same as W10
+ emis_scale = 1.->0.9
+ Mods for RHMAX
and -cppdefs -DUSE_XLIU_MOD'
(same mods as in C5c)
+ new soil erodibilty file: dst_source2x2_cam5.4_c150327.nc

w/ obs
w/ W10

w/ cam5.3

w/ w5
X2 b.e13.B1850C5CN.f09_g16_
beta17_cam5.4_alpha03.002

Same as W11
but in coupled mode

timeseries

w/ obs
w/ Large-ensemble

 
X3 b.e13.B1850C5CN.f09_g16_
beta17_cam5.4_alpha03.003

Same as X2
dp1= 0.1->0.05

timeseries

w/ obs
w/ X2
w/ Large-ensemble

 
X4 b.e13.B1850C5CN.f09_g16_
beta17_cam5.4_alpha03.004

Same as X3
dcs = 150->300 microns
dp1= 0.1->0.05

timeseries

w/ obs
w/ X3
w/ Large-ensemble

 
X5 b.e13.B1850C5CN.f09_g16_
beta17_cam5.4_alpha03.005

Same as X2
dcs = 150->300 microns

timeseries

w/ obs
w/ X2
w/ Large-ensemble

 
X6 b.e13.B1850C5CN.f09_g16_
beta17_cam5.4_alpha03.006

Same as X2
subgrid =1.->1.2

timeseries

w/ obs
w/ X2
w/ Large-ensemble

 
X7 b.e13.B1850C5CN.f09_g16_
beta17_cam5.4_alpha03.007

Same as X6
dcs = 150->250 microns

timeseries

w/ obs
w/ X6
w/ Large-ensemble

CVDP

 


ENSO amplitude in CAM5.4

Simulations to figure out parameters responsible of the strong ENSO in CAM5.4 

ID Casename Case Description AMWG diag Aerosol diags
X2 b.e13.B1850C5CN.f09_g16_
beta17_cam5.4_alpha03.002

Same as W11
but in coupled mode

timeseries

w/ obs

nino3.4

 
X6 b.e13.B1850C5CN.f09_g16_
beta17_cam5.4_alpha03.006

Same as X2
subgrid =1.->1.2

timeseries

w/ obs

nino3.4

 
X7 b.e13.B1850C5CN.f09_g16_
beta17_cam5.4_alpha03.007

Same as X6
dcs = 150->250 microns

timeseries

w/ obs
w/ X6
w/ Large-ensemble

CVDP
nino3.4

 
X8 b.e13.B1850C5CN.f09_g16_
beta17_cam5.4_alpha03.008

Same as X7
+ use old topography

timeseries

w/obs
w/ X7

nino3.4

 
X9 b.e13.B1850C5CN.f09_g16_
beta17_cam5.4_alpha03.009

Same as X7
+ dp1 = 0.05

timeseries

w/obs
w/ X7

nino3.4

 
X10 b.e13.B1850C5CN.f09_g16_
beta17_cam5.4_alpha03.010

Same as X7

+ dcs = 250-> 200 microns
+ co_lnd = 0.045

timeseries

w/obs
w/ X7

nino3.4

 

CAM5.4: Final configuration

We retained X7 for the final configuration of CAM5.4

ID Case Description Diagnostics Details/Comments
f2000_cam5.4
CAM standalone with climatological SSTs
w/ obs
w/ cam5.3 (5-year run)
Not available
f2000_pia_cam5.4
CAM standalone with climatological SSTs
+ preindustrial aerosol
w/ f2000_cam5.4 Not available
famip_cam5.4

AMIP run
+ COSP simulator (coming soon)

w/ obs (yrs 1980-2004)
w/ cam5.3 (yrs 1980-2004)

AMWG variability
CVPD package

 
b1850_cam5.4

Coupled run

Hybrid run started from large-ensemble at year 402

Atm

 

timeseries
w/ obs
w/ X6
w/ LENS

CVDP package


Lnd w/ LENS and obs
Ocn

timeseries
w/ obs
w/ LENS

Obs: enso

Ice w/ LENS

 

e1850_cam5.4_1xco2 Slab Ocean Model + 1xCO2
timeseries
w/ b1850_cam5.4
Not available
e1850_cam5.4_2xco2 Slab Ocean Model + 2xCO2 timeseries 
w/ e1850_1xco2
Not available