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Turning off CLM

B

brianpm

Active Member
Hopefully this is a simple question, but it's been giving me a headache.

I want to run an aqua planet configuration with a data ocean rather than an analytic SST distribution. There is no option for that in sst_data.F90 in the aqua_planet section, so I thought I would invent my own aqua planet.

To do it, I am trying to put eccen=obliq=mvelp=0. in the CAM namelist, to get rid of any seasonal cycle and hemispherically asymmetric insolation. I also edited the input data
/atm/cam2/inic/gaus/cami_0000-09-01_64x128_L26_c030918.nc, making PHIS, SGH, LANDM, SNOWHICE, LANDFRAC, ICEFRAC, SICTHK, and LANDM_COSLAT all equal to zero everywhere. To try to make the CLM dataset agree with these changes, I made similar changes to /lnd/clm2/srfdata/cam/clms_64x128_USGS_c030605.nc. That is, I made LANDMASK, LANDFRAC, and LANDFRAC_PFT all equal to 0 everywhere.

As you might guess, this doesn't seem to work. I get an error that looks like:
...
Attempting to read surface boundary data .....
(GETFIL): attempting to find local file clms_64x128_USGS_c030605.nc
(GETFIL): using /ptmp/brianpm/lnd/clm2/srfdata/cam/clms_64x128_USGS_c030605.nc
Successfully read surface boundary data

initDecomp(): Number of processes exceeds number of land grid cells
ENDRUN: called without a message string

Traceback:
initDecomp(): Number of processes exceeds number of land grid cells
ENDRUN: called without a message string

I'm not sure what to do with this. Is it possible to just turn off CLM, or is there a better way to edit these input files, or do I have to start mucking around in the code? Or have I gone about this problem wrong to begin with?

Any advice is welcome.
 
O

olson

Member
> I want to run an aqua planet configuration with a data ocean rather than an
> analytic SST distribution. There is no option for that in sst_data.F90 in the
> aqua_planet section, so I thought I would invent my own aqua planet.
>
> To do it, I am trying to put eccen=obliq=mvelp=0. in the CAM namelist, to get
> rid of any seasonal cycle and hemispherically asymmetric insolation. I also
> edited the input data
> /atm/cam2/inic/gaus/cami_0000-09-01_64x128_L26_c030918.nc, making PHIS, SGH,
> LANDM, SNOWHICE, LANDFRAC, ICEFRAC, SICTHK, and LANDM_COSLAT all equal to
> zero everywhere. To try to make the CLM dataset agree with these changes, I
> made similar changes to /lnd/clm2/srfdata/cam/clms_64x128_USGS_c030605.nc.
> That is, I made LANDMASK, LANDFRAC, and LANDFRAC_PFT all equal to 0
> everywhere.
>
> As you might guess, this doesn't seem to work. I get an error that looks like:
> ...
> Attempting to read surface boundary data .....
> (GETFIL): attempting to find local file clms_64x128_USGS_c030605.nc
> (GETFIL): using /ptmp/brianpm/lnd/clm2/srfdata/cam/clms_64x128_USGS_c030605.nc
> Successfully read surface boundary data
>
> initDecomp(): Number of processes exceeds number of land grid cells
> ENDRUN: called without a message string
>
> Traceback:
> initDecomp(): Number of processes exceeds number of land grid cells
> ENDRUN: called without a message string
>


When the land model initializes, it checks for consistency between its
configuration and the atm configuration. The model likely aborted at
the point of finding inconsistencies.


>
> I'm not sure what to do with this. Is it possible to just turn off CLM, or is
> there a better way to edit these input files, or do I have to start mucking
> around in the code? Or have I gone about this problem wrong to begin with?
>

It would be best to do the reverse of what you tried above, namely, run
the model in aqua_planet mode but minimally muck with code to re-enable the
data ocean (and, presumably, the sea-ice if you desire).


So:


1. set "aqua_planet" to .true. in the namelist

2. set eccen=obliq=mvelp=0. as you did before in the namelist

3. To re-enable the data ocean code:

reverse the "aqua_planet" logic for all occurrences in the following 2
files:


- models/atm/cam/src/ocnsice/dom/sst_data.F90
- models/atm/cam/src/ocnsice/dom/camoce.F90

4. To additionally re-enable the sea ice code:

reverse the "aqua_planet" logic for all occurrences in the following 3
files:


- models/ice/csim4/camice.F90
- models/ice/csim4/ice_data.F90
- models/atm/cam/src/physics/cam1/tphysac.F90


5. Finally, to ensure a more hemispherically symmetric radiative
forcing, it is recommended to use a hemispherically symmetric ozone
dataset which can be found on the NCAR MSS in ready-to-use format at:

/OLSON/datasets/T42/apeozone.nc

Or build a dataset yourself using the Aqua-planet Experiment Project:

http://www.met.reading.ac.uk/~mike/APE/ape_ozone.html

(using the CAM default ozone netCDF dataset as a template)
 
B

brianpm

Active Member
I had some trouble with the ozone data at first, so I reverted to the original for now and I'll make my own once it is running. I'm also just leaving sea-ice off for right now, which will also change in the future.

However, I've done steps 1, 2, and 3 from the original reply and I'm having trouble. (Also I didn't notice any aqua_planet logic in models/atm/cam/src/ocnsice/dom/camoce.F90, or am I missing something?)

Here's what is spit out:
...
INITEXT: attribute from_hires is true.
Will use tssub values to guess sea ice
(shr_orb_params) Calculate characteristics of the orbit:
(shr_orb_params) CVS revision: $Revision: 1.2.4.1 $
(shr_orb_params) CVS Tag : $Name: cam3_0_brnchT_p1 $
(shr_orb_params) Use input orbital parameters:
(shr_orb_params) ------ Computed Orbital Parameters ------
(shr_orb_params) Eccentricity = 0.000000E+00
(shr_orb_params) Obliquity (deg) = 0.000000E+00
(shr_orb_params) Obliquity (rad) = 0.000000E+00
(shr_orb_params) Long of perh(deg) = 0.000000E+00
(shr_orb_params) Long of perh(rad) = 3.141593E+00
(shr_orb_params) Long at v.e.(rad) = 0.000000E+00
(shr_orb_params) -----------------------------------------
Not a netCDF id
ENDRUN:HANDLE_ERROR

Traceback:
Offset 0x000001ac in procedure __abortutils_MOD_endrun, near line 45 in file /home/bluesky/brianpm/ca
m1/models/atm/cam/src/control/abortutils.F90
Offset 0x000000ac in procedure handle_error, near line 735 in file /home/bluesky/brianpm/cam1/models/
atm/cam/src/control/wrap_nf.F90
Offset 0x00000034 in procedure wrap_inq_dimid, near line 80 in file /home/bluesky/brianpm/cam1/models
/atm/cam/src/control/wrap_nf.F90
Offset 0x0000068c in procedure __sst_data_MOD_sstini, near line 277 in file /home/bluesky/brianpm/usr
_src/sst_data.F90
Offset 0x00000fa0 in procedure initext, near line 273 in file /home/bluesky/brianpm/cam1/models/atm/c
am/src/control/initext.F90
Offset 0x0000103c in procedure cam, near line 207 in file /home/bluesky/brianpm/cam1/models/atm/cam/s
rc/control/cam.F90

So it seems like something isn't sitting right with the SST data, but I even reverted back to the original SSTs. It looks like it is just looking for the dimensions of the data, which are in the file, so it must be a problem with reading the dataset or assigning it an ID or something....

Any suggestions?
 
B

brianpm

Active Member
It looks like I might have found my problem. I need to reverse the aqua_planet logic in initext.F90 at the line that says "if (.not. aqua_planet) then". Otherwise the SST data won't be assigned an ID, I guess.
 
O

olson

Member
> I had some trouble with the ozone data at first, so I reverted to the original for now
> and I'll make my own once it is running. I'm also just leaving sea-ice off for right >now, which will also change in the future.

> However, I've done steps 1, 2, and 3 from the original reply and I'm having trouble.
> (Also I didn't notice any aqua_planet logic in >models/atm/cam/src/ocnsice/dom/camoce.F90, or am I missing something?)

... no, I was missing something - I was looking at a different version of CAM. In
CAM3.0 you are correct that the aqua-planet code that I was seeing in camoce
actually resides in initext as you found.

Likewise, for ice, no aqua_planet logic lives in "camice" but rather in "ice_data"
 
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