[ncl-talk] How can I plot QNICE in WRF output file?

[Fangda]

Hi:

Thanks for all your help, I have checked the variable list using
"ncl_filedump",  and the variable of QNICE is indeed in wrfout file when I
use the thompson scheme.

I did a mistake that I wrote the wrong filepath to my wrfout files, as I
run the same case with four microphysic schemes. The "wrf_user_getvar"
works well now when I change to the correct filepath.

Best wishes!

Fangda


2018-04-19 0:12 GMT+08:00 Barry Lynn <barry.h.lynn at gmail.com>:

> Hi:
>
> Within your ncl program, you can do print(fin), where
> fin = addfile(filename,"r")
>
> filename is the name of your wrf output file.
>
> On Wed, Apr 18, 2018 at 6:45 PM, Bill Ladwig <ladwig at ucar.edu> wrote:
>
>> Hi Fangda,
>>
>> The first step is to look at your data. Are you sure QNICE is a variable
>> in your WRF output file? Don't assume. Use the 'ncdump -h your_wrf_file'
>> command or ncl_filedump (https://www.ncl.ucar.edu/Docu
>> ment/Tools/ncl_filedump.shtml) to look at the contents of your WRF file.
>> If you don't see QNICE in there, you won't be able to read it. The absence
>> or presence of variables in the output file is determined by your WRF
>> configuration and also how you have your registry set up. I don't remember
>> QNICE being one that is written out by default, so you might need to modify
>> the registry, rebuild, and re-run if it's not there.
>>
>> Hope this helps,
>>
>> Bill
>>
>> On Wed, Apr 18, 2018 at 7:49 AM, Fangda <tengfangda at gmail.com> wrote:
>>
>>> Hello Everyone
>>>
>>> When I use wrf_user_getvar function to deal with Ice Number
>>> concentration in wrfout files, I get this message:
>>>
>>> fatal:No valid instance of variable QNICE found in file list
>>>> fatal:["Execute.c":8640]:Execute: Error occurred at or near line 662
>>>> in file /usr/local/ncl6.4.0/lib/ncarg/nclscripts/wrf/WRFUserARW.ncl
>>>> fatal:["Execute.c":8640]:Execute: Error occurred at or near line 1716
>>>> in file /usr/local/ncl6.4.0/lib/ncarg/nclscripts/wrf/WRFUserARW.ncl
>>>
>>>
>>> Does it mean I cann't read QNICE using this function? How can I read
>>> QNICE in WRF output file with ncl?
>>>
>>> I appreciate your help, thanks.
>>>
>>> Fangda
>>>
>>>
>>>
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>
>
> --
> Barry H. Lynn, Ph.D
> Senior Lecturer,
> The Institute of the Earth Science,
> The Hebrew University of Jerusalem,
> Givat Ram, Jerusalem 91904, Israel
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>
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