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If I have triple nesting, how can I know whether a variable and its value is from d01，d02 or d03?

M

mirabelle

Member
Dear WRF：
If I have triple nesting, how can I know whether a variable and its value is from d01，d02 or d03?
How can I tell which region the subroutine is running in？
 
mirabelle said:
Dear WRF：
If I have triple nesting, how can I know whether a variable and its value is from d01，d02 or d03?
How can I tell which region the subroutine is running in？
Click to expand...
Good morning,

The output file are written in the standard format of wrfout_d(domain number). So if you have triple nesting you will get wrfout_d01, wrfout_d02, wrfout_d03.

A tutorial on nesting and their output is in this YouTube video from NCAR.

 
Whatheway said:
Good morning,

The output file are written in the standard format of wrfout_d(domain number). So if you have triple nesting you will get wrfout_d01, wrfout_d02, wrfout_d03.

A tutorial on nesting and their output is in this YouTube video from NCAR.

Click to expand...
Hi：
I added a subroutine in the dyn_em/solve. F which will be used once in each time step. This program is running well when I only have domain d01.
But when I ran the nesting domain, there is something wrong says "forrtl: severe (174): SIGSEGV, segmentation fault occurred".
So I wish my program can only be used in domain d01.
Do you know how to check the domain id in dyn_em/solve.F?
 
mirabelle said:
Hi：
I added a subroutine in the dyn_em/solve. F which will be used once in each time step. This program is running well when I only have domain d01.
But when I ran the nesting domain, there is something wrong says "forrtl: severe (174): SIGSEGV, segmentation fault occurred".
So I wish my program can only be used in domain d01.
Do you know how to check the domain id in dyn_em/solve.F?
Click to expand...
Can you attach your namelist files for wps and wrf?
 
Whatheway said:
Can you attach your namelist files for wps and wrf?
Click to expand...
Hi,
This is my namelist.wps and namelist.input.
The WRF model I am using is V3.7.1 with vortex following
 

Attachments

  • namelist.input
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  • namelist.wps
    918 bytes · Views: 2
  • namelist.input
    9.1 KB · Views: 3
mirabelle said:
Hi,
This is my namelist.wps and namelist.input.
The WRF model I am using is V3.7.1 with vortex following
Click to expand...
dx = 27000,9000,3000,
dy = 27000,9000,3000,
time_step = 60,

Pretty sure your time step is to large.

Time_step should be 6* (smallest dx) so your model is failing because it can't step forward at the right amount. If you can attach your rsl error files I can confirm this. Alternatively, change time_step to 15 (even though 6*3km is 18 that doesn't go evenly into 60s)
 
Whatheway said:
I could also read the users guide for WRF about namelist settings.

github.com

GitHub - wrf-model/Users_Guide: WRF Users' Guide in restructured text format

WRF Users' Guide in restructured text format. Contribute to wrf-model/Users_Guide development by creating an account on GitHub.
github.com github.com

Looks like your WPS and WRF don't match for domains.
Click to expand...
My namelist running well when I don't use my subroutine.
And we don't need input_d02 and input_d03 when we use "input_from_file = .true.,.false.,.false.,".
Here is my rsl error file when I used my subroutine
 

Attachments

  • rsl.error.0000
    125.1 KB · Views: 3
mirabelle said:
My namelist running well when I don't use my subroutine.
And we don't need input_d02 and input_d03 when we use "input_from_file = .true.,.false.,.false.,".
Here is my rsl error file when I used my subroutine
Click to expand...
Obviously, the error occured on nesting domain. That why I wish my program can only be used in domain d01
 
Just a quick answer to your question how to know which domain the model is running on:

in solve_em.F, grid%id tells the current model domain.
 
mirabelle said:
Dear WRF：
If I have triple nesting, how can I know whether a variable and its value is from d01，d02 or d03?
How can I tell which region the subroutine is running in？
Click to expand...
are you using intel compilers by chance?
 
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