CAM5.1

CAM5.1 milestone simulations


1. Overview

CAM5.1 = CAM5..0 + bugfixes + retunings

Bugfixes
1. A fix to immersion freezing (small changes)
2. Fixing the diagnostic output FICE to trap for roundoff errors (diagnostic only)
3. Bug fix for subgrid cloud water treatment in contact nucleation (small changes)
4. Bug fix for size of snow particles used in radiation (they get smaller by a factor of 3 and more reflective: some impact).
5. Fix to guarantee the in-stratus LWC to be within the specified range even when the cloud fraction is very small ( < 1.e-5 )
6 Fix to prevent model crash by dividing by near zero cloud fraction in the droplet activation routine

Tuning parameters in CAM5.1

  CAM5.1 (1 deg) CAM5.1 (2deg : 156jp) CAM5 (2deg)
Dcs 400 400 325
dp1 0.1 0.1 0.04
dp2 500 500 675
rhminl 0.8975 0.8875 0.89
c0_lnd 0.0059 0.0059 0.0020
c0_ocn 0.0450 0.0450 0.0150
dust_emis_fact 0.35 0.35 0.43
rpen 10 5 10



 

2. CAM5.1 simulations at 1 degree

CAM standalone

Casename
Description
Diagnostics
Comments
AMIP run cam5.1_amip_1d_002 AMIP run w/ obs  
Climo SSTs cam5.1_climosst_1d_002 Climo SSTs run with present day SSTs w/ obs  
Climo SSTs
and pre-industrial aerosol
cam5.1_climosst_pia_1d_003 Climo SSTs run with present day SSTs
+ pre-industrial aerosol

w/ obs

ADE
AIE - SW
AIE - LW

 

 

Coupled simulations

Casename
Description
Diagnostics
Other diags
1850 control b40_1850_1d_b08c5cn_138j 1850 control

RESTOM
TS
w/ obs
nino3.4
nino3

Ice: yr300-319
Lnd: yr300-319
Ocn: timeseries, yr300-319

20th century b40_20th_1d_b08c5cn_138j 20th century
Hybrid started from b40_1850_1d_b08c5cn_138j at year 225

RESTOM
TS
w/ obs
w/ b40_1850_1d_b08c5cn_138j
w/ b40_20th_1d_b08c5cn_139jp
nino3.4
nino3

 
20th century b40_20th_1d_b08c5cn_139jp 20th century
Hybrid started from b40_1850_1d_b08c5cn_138j at year 232

RESTOM
TS
w/ obs
w/ b40_1850_1d_b08c5cn_138j
w/ b40_20th_1d_b08c5cn_138j
w/ b40.20th.track1.1deg.006
nino3.4
nino3

 

SOM simulations

Casename
Description
Diagnostics
Comments
1xCO2 e40_1850_1d_b08c5cn_140f SOM run TS  
2xCO2 e40_1850_2co2_1d_b08c5cn_141f SOM run + 2xCo2

TS
w/ e40_1850_1d_b08c5cn_140f

 
2xCO2
+ present day aerosol
e40_1850_2co2pda_1d_b08c5cn_143f SOM run + 2xCO2 TS
w/ e40_1850_1d_b08c5cn_140f
 

 


 

2. Simulations at 2 degree

CAM standalone

Casename
Description
Diagnostics
Comments
AMIP run cam5.1_amip_2d_001 AMIP run w/ obs  
Climo SSTs cam5.1_climosst_2d_002 Climo SSTs run with present day SSTs w/ obs  
Climo SSTs
and pre-industrial aerosol
cam5.1_climosst_pia_2d_003 Climo SSTs run with present day SSTs
+ pre-industrial aerosol

w/obs

ADE
AIE - SW
AIE - LW

 

 

Coupled simulations

Casename
Description
Diagnostics
Comments
1850 control b40_1850_2d_r07c5cn_160jp 1850 control RESTOM
TS
w/obs
 
20th century b40_20th_2d_r07c5cn_161jp 20th century

RESTOM
TS
w/ obs
w/ b40_1850_2d_r07c5cn_160jp

 
20th century b40_20th_2d_r07c5cn_pia_162jp 20th century + keep aerosols to 1850 level

w/ obs
w/ b40_1850_2d_r07c5cn_160jp