Scheduled Downtime
On Tuesday 24 October 2023 @ 5pm MT the forums will be in read only mode in preparation for the downtime. On Wednesday 25 October 2023 @ 5am MT, this website will be down for maintenance and expected to return online later in the morning.
Normal Operations
The forums are back online with normal operations. If you notice any issues or errors related to the forums, please reach out to help@ucar.edu

modifying the input data

hannay

hannay

Cecile Hannay
AMWG Liaison
Staff member
From user:Here is a question about modifying the input data. Can you help me with it? I had a control run and I was trying to perturb the initial condition of CAM, i.e., the zonal wind, to generate the ensembles. Someone told me how to generate a new restart file and replace the old one in CAM4. However, I need to do it to the fully coupled model of CESM1.2.2. Do you know where can I find the right place to do it? /glade/u/home/gfang/cases/B_2000_CAM5_f09_g16_ctl/Buildconf/camconf?Where can I find the details about doing this?Thanks
 
hannay

hannay

Cecile Hannay
AMWG Liaison
Staff member
The initial conditions are set in the namelist by the variable ncdata:ncdata          = '/glade/p/cesmdata/cseg/inputdata/atm/cam/inic/fv/cami-mam3_0000-01-01_0.9x1.25_L30_c100618.nc'If you want to use intead another file (let's call it newfile.nc): ncdata          = '/path_to_your_newfile/newfile.nc' You can replace the ncdata by adding a line in the file usr_nl_cam:   ncdata          = '/path_to_your_newfile/newfile.nc'  Another way to perturb the initial conditions is to change the namelist variables:pertlimFor instance, you could usepertlim  = 1.d-14 
 
You must log in or register to reply here.
Top