CAM4 volcanic aerosols

[amatcaos@caos_iisc_ernet_in]

Hello everyone,I am using CAM4, E1850CN compset. In this compset prescribed tropospheric aerosls data is used (shown below taken from CAM namelist)....&prescribed_aero_nl
 prescribed_aero_cycle_yr               = 1850
 prescribed_aero_datapath               = '$DIN_LOC_ROOT/atm/cam/chem/trop_mozart_aero/aero'
 prescribed_aero_file           = 'aero_1.9x2.5_L26_1850clim_c091112_20Mt_17km.nc'
 prescribed_aero_specifier              = 'sulf:SO4', 'bcar1:CB1', 'bcar2:CB2', 'ocar1:OC1', 'ocar2:OC2', 'sslt1:SSLT01', 'sslt2:SSLT02',
  'sslt3:SSLT03', 'sslt4:SSLT04', 'dust1:DST01', 'dust2:DST02', 'dust3:DST03', 'dust4:DST04'
 prescribed_aero_type           = 'CYCLICAL'
...My question is, Can I do a simulation with prescribed volcanic aerosols with prescribed_aero_type  = 'CYCLICAL' in the same compset E1850CN.
 Many ThanksAngshuman

 

[eaton]

The volcano emissions (eruptive) come from the prescribed_volcaero_file, so the setting of prescribed_aero_type will not affect it.  Look at the namelist variables for prescribed_volcaero_* 

 

[eaton]

The volcano emissions (eruptive) come from the prescribed_volcaero_file, so the setting of prescribed_aero_type will not affect it.  Look at the namelist variables for prescribed_volcaero_* 

 

[amatcaos@caos_iisc_ernet_in]

Thanks Eaton.Actually I also looked into the prescribed_volcaero_nl.I find that when I configure the E1850CN compset, the namelist variable group prescribed_volcaero_nl doesn't get listed in the cam.buildnml.csh. I am not sure what I should  do to get the prescribed_volcaero_nl namelist variable group.I was also thinking that whether it is possible to get the prescribed volcanic aerosols in any compset. beacuse when I searching for the inputdata of volcanic aerosol physical properties and its distribution I got below listed files:CCSM4_volcanic_1850-2008_prototype1.ncCCSM4_volcanic_1850-2009_prototype1.ncCCSM4_volcanic_1850-2011_prototype1.nc    and volc_camRT_byradius_sigma1.6_c130724.ncThe distribution files are trasient files and the physical property file is very differnt from the sulfate_camrt_c080918.nc, dust1_camrt_c080918.nc and others Thanks again 

 

[amatcaos@caos_iisc_ernet_in]

Thanks Eaton.Actually I also looked into the prescribed_volcaero_nl.I find that when I configure the E1850CN compset, the namelist variable group prescribed_volcaero_nl doesn't get listed in the cam.buildnml.csh. I am not sure what I should  do to get the prescribed_volcaero_nl namelist variable group.I was also thinking that whether it is possible to get the prescribed volcanic aerosols in any compset. beacuse when I searching for the inputdata of volcanic aerosol physical properties and its distribution I got below listed files:CCSM4_volcanic_1850-2008_prototype1.ncCCSM4_volcanic_1850-2009_prototype1.ncCCSM4_volcanic_1850-2011_prototype1.nc    and volc_camRT_byradius_sigma1.6_c130724.ncThe distribution files are trasient files and the physical property file is very differnt from the sulfate_camrt_c080918.nc, dust1_camrt_c080918.nc and others Thanks again 

 

[eaton]

By default you'll only get transient runs set up with eruptive volcanoes.  You can add this dataset to an 1850 climatology run, but it should have no effect since there are no volanoes erupting in 1850 (if I remember correctly).  To customize the namelist you should add the settings you want to the user_nl_cam file. 

 

[eaton]

By default you'll only get transient runs set up with eruptive volcanoes.  You can add this dataset to an 1850 climatology run, but it should have no effect since there are no volanoes erupting in 1850 (if I remember correctly).  To customize the namelist you should add the settings you want to the user_nl_cam file.