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Creating initial conditions for CAM5

olson

Member
Adding this as an option to the model has been discussed but is not being worked on currently, as far as I know.
 

olson

Member
Adding this as an option to the model has been discussed but is not being worked on currently, as far as I know.
 

olson

Member
Adding this as an option to the model has been discussed but is not being worked on currently, as far as I know.
 
Any difference for continue run or branch run in this case? May it be more easier to just change the *cam.r.* file and just simply continue run, or is there a checking in continue run and we must use branch run instead?
 
Any difference for continue run or branch run in this case? May it be more easier to just change the *cam.r.* file and just simply continue run, or is there a checking in continue run and we must use branch run instead?
 
Any difference for continue run or branch run in this case? May it be more easier to just change the *cam.r.* file and just simply continue run, or is there a checking in continue run and we must use branch run instead?
 

olson

Member
 We have been finding it increasingly difficult to change
 cam.r. files since their format/contents are subject to change without
 our knowledge.

  I would suggest doing a branch run from the last restart
 of your spin-up (2016-01?) and have the model dump out
 monthly IC files (cam.i.).

  You can do this by adding the following 2 lines to your
 namelist:

  INITHIST      = 'MONTHLY'
  INITHIST_ALL  = .true.


  Then modify the cam.i.2016-03-01-00000 file with your ERA-Interim results.

  Then use that modified cam.i. file along with the clm2.r.2016-03-01-00000 file
 (finidat = [clm2 file] in the namelist) to do an initial run for your precip studies.
 

olson

Member
 We have been finding it increasingly difficult to change
 cam.r. files since their format/contents are subject to change without
 our knowledge.

  I would suggest doing a branch run from the last restart
 of your spin-up (2016-01?) and have the model dump out
 monthly IC files (cam.i.).

  You can do this by adding the following 2 lines to your
 namelist:

  INITHIST      = 'MONTHLY'
  INITHIST_ALL  = .true.


  Then modify the cam.i.2016-03-01-00000 file with your ERA-Interim results.

  Then use that modified cam.i. file along with the clm2.r.2016-03-01-00000 file
 (finidat = [clm2 file] in the namelist) to do an initial run for your precip studies.
 

olson

Member
 We have been finding it increasingly difficult to change
 cam.r. files since their format/contents are subject to change without
 our knowledge.

  I would suggest doing a branch run from the last restart
 of your spin-up (2016-01?) and have the model dump out
 monthly IC files (cam.i.).

  You can do this by adding the following 2 lines to your
 namelist:

  INITHIST      = 'MONTHLY'
  INITHIST_ALL  = .true.


  Then modify the cam.i.2016-03-01-00000 file with your ERA-Interim results.

  Then use that modified cam.i. file along with the clm2.r.2016-03-01-00000 file
 (finidat = [clm2 file] in the namelist) to do an initial run for your precip studies.
 

ManYue

MY
New Member
Dear Olson I am a user of cesm1.2.2. I am interested in simulating global precipitation for Sept, 2016 - Jan, 2017 with CAM-SE 1deg set up. I am following the step (#3) in https://bb.cgd.ucar.edu/node/1001566 for generating the ICs. 1. I spun up the land from 2010/01 - 2016/02. Now I've land ICs and atmospheric startup file for 2016/03. 2. I regridded the ERA-Interim data for 2016-03-01:00:00:00 to SE 1 deg. I did not fully understand the next step:For spin up of atmosphere, 6-hourly runs are suggested for one model month replacing with ECMWF values after every 6-hourly interval. Does it mean that I replace the state variables with ERA-Interim for 2016-03-01:00 and stop it after first 6-hours (with inithist='6-hourly'). Then again replace with ERA-Interim 2016-03-01:06 values and run again for next 6 hours and so on. Do this until 2016-03-31:18. a. Is my understanding correct?b. why this exercise has to be done for 1 month (= [31 days x 4 timesteps] times)?c. What way will it effect if I just do this for the first timestep i.e, 2016-03-01:00 and let it run until jan 2017?


Hi, I'm wondering how to regrid the ERA-Interim data into SE 1 deg, and the link above doesn't work. Can you just tell me where to find this or how to regird the ERA into SE grid? Look forward your replay and thank you very much.
 
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