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output fields on tape 8 once a month

hannay

hannay

Cecile Hannay
AMWG Liaison
Staff member
Hi Dan,Pleae could you be a little bit more specific. Are trying to output fields for atmosphere, ocean, and... ? Are you talking about the restart files ?Instructions about changing the output frequency of the history files can be found in:http://www.cesm.ucar.edu/events/tutorials/081114/practical4-hannay.pdf 
 
hannay

hannay

Cecile Hannay
AMWG Liaison
Staff member
Hi Dan,Pleae could you be a little bit more specific. Are trying to output fields for atmosphere, ocean, and... ? Are you talking about the restart files ?Instructions about changing the output frequency of the history files can be found in:http://www.cesm.ucar.edu/events/tutorials/081114/practical4-hannay.pdf 
 
D

dan_lipsa@kitware_com

Member
Hi,Thank you for your answer.I am trying to output fields for atmosphere (cam 5.3) in the history file. Thank you for the link. Indeed, I was able to change output fields frequency for tape 1 (from yearly to daily) as shown in the slides.However, I don't seem to find the right namelist for changing output for tape 8 from yearly to monthly.Thank you,
 
D

dan_lipsa@kitware_com

Member
Hi,Thank you for your answer.I am trying to output fields for atmosphere (cam 5.3) in the history file. Thank you for the link. Indeed, I was able to change output fields frequency for tape 1 (from yearly to daily) as shown in the slides.However, I don't seem to find the right namelist for changing output for tape 8 from yearly to monthly.Thank you,
 
hannay

hannay

Cecile Hannay
AMWG Liaison
Staff member
You can output a maximum of 6 history files. You won't be able to able "tape 8". About teh output frequency, only the first tape (the *h0* files) can be output monthly by setting nhtfrq =0
For the other tapes you need to specify number of hours (or timesteps).  For nhtfrq: see documentation at: http://www.cesm.ucar.edu/cgi-bin/eaton/namelist/nldef2html-pub

Array of write frequencies for each history file series.
If nhtfrq(1) = 0, the file will be a monthly average.
Only the first file series may be a monthly average. If
nhtfrq(i) > 0, frequency is specified as number of
timesteps. If nhtfrq(i) < 0, frequency is specified
as number of hours.

Default: 0,-24,-24,-24,-24,-24
 
hannay

hannay

Cecile Hannay
AMWG Liaison
Staff member
You can output a maximum of 6 history files. You won't be able to able "tape 8". About teh output frequency, only the first tape (the *h0* files) can be output monthly by setting nhtfrq =0
For the other tapes you need to specify number of hours (or timesteps).  For nhtfrq: see documentation at: http://www.cesm.ucar.edu/cgi-bin/eaton/namelist/nldef2html-pub

Array of write frequencies for each history file series.
If nhtfrq(1) = 0, the file will be a monthly average.
Only the first file series may be a monthly average. If
nhtfrq(i) > 0, frequency is specified as number of
timesteps. If nhtfrq(i) < 0, frequency is specified
as number of hours.

Default: 0,-24,-24,-24,-24,-24
 
D

dan_lipsa@kitware_com

Member
I see. I did notice that those frequencies have 6 fields. I guess I was confused by the following entries in the log file produced when cam is run:  FLDLST: History file            8  contains           37  fields                   |                                                                                       Write frequency:                 YEARLY   (INITIAL CONDITIONS)                    |                                                                                       Filename specifier:              %c.cam.i.%y-%m-%d-%s.nc                          |                                                                                       Output precision:                double                                           |                                                                                       Number of time samples per file:            1                                     |                                                                                       Then, it goes on to list all the fields.  Does this mean that to see those fields, I have to include them on the first tape (or on other ones)?Thank you,
 
D

dan_lipsa@kitware_com

Member
I see. I did notice that those frequencies have 6 fields. I guess I was confused by the following entries in the log file produced when cam is run:  FLDLST: History file            8  contains           37  fields                   |                                                                                       Write frequency:                 YEARLY   (INITIAL CONDITIONS)                    |                                                                                       Filename specifier:              %c.cam.i.%y-%m-%d-%s.nc                          |                                                                                       Output precision:                double                                           |                                                                                       Number of time samples per file:            1                                     |                                                                                       Then, it goes on to list all the fields.  Does this mean that to see those fields, I have to include them on the first tape (or on other ones)?Thank you,
 
E

eaton

CSEG and Liaisons
Sorry for the confusion.  The fact that the initial file is implemented internally as a history file with some special properties is not supposed to be visible to the user.  The 'sathist' file is another case of this where internally it uses a lot of the history file code, but it has special properties and a separate set of namelist variables to control it.  Back to the initial file, the control of its output frequency is via the inithist namelist variable. 
 
E

eaton

CSEG and Liaisons
Sorry for the confusion.  The fact that the initial file is implemented internally as a history file with some special properties is not supposed to be visible to the user.  The 'sathist' file is another case of this where internally it uses a lot of the history file code, but it has special properties and a separate set of namelist variables to control it.  Back to the initial file, the control of its output frequency is via the inithist namelist variable. 
 
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