start year modification, aerosol experiment

[jechu@pusan_ac_kr]

Dear CESM users,

I'm planning to run fully coupled experiments to see aerosol effect in climate model.

Experiment design is like,
1. control experiment (time-varying all forcing) for 1950-2005
2. Same as in 1 except that aerosol forcing is not time-varying (constant since 1950).

* case information is,
create_newcase -case /data/chu/cesm/cases/time.test1 -res f19_g16 -compset B_1850-2000_CN -mach generic_linux_pgi -scratchroot /data/chu/cesm/run -din_loc_root_csmdata /data/cgd/csm/inputdata -max_tasks_per_node 40


Could you give me any answer for my questions?


What I'm wondering is that,

1. How can I change the start year? I would like to simulate 1950-2005 climate.
But B_1850-2000_CN compset is started from 1850.
If I edit "RUN_STARTDATE = 1950-01-01", is it correctly started from 1950?
Otherwise, Should I start the run from 1850?

2. Is it possible to download the 1950 initial condition file?
If possible, where?

3. How can I remove aerosol effect? Is there any option? or should I modify the source code?


I'm a complete novice at model experiment.
I'll be really appreciate if any model expert could give me any comments on it.

Thank you.

 

[hannay]

You can change the start date by setting
RUN_STARTDATE = 1950-01-01

I am putting 1950 initial conditions on the ftp server:
ftp ftp.cgd.ucar.edu
cd pub/hannay

You will have to set: RUN_TYPE, RUN_REFCASE and RUN_REFDATE

You have to set your run to start from this initial condition by chnaging the REF_

 

[jechu@pusan_ac_kr]

Thank you hannay.

I downloaded from ftp-server.

Is there any other different initial condition?
If there is, I wish to do ensemble mean as many as possible(around 10-member?).

Thanks again for the help. I really appreciate it.