[ncl-talk] problem with background on moving domain

[Mary Haley]

Yu,

To answer your question about the labels on the two Y axes:  this is due to
the nature of your map. It may be slightly rotated, and hence the latitude
values on the left side of the plot are not going to be the same latitude
values on the right side of the plot.

I've attached two modified scripts for you to try.  I converted your code
to use gsn_csm_contour_map. These scripts no longer use the native WRF map
projection, but instead use the XLAT/XLONG read off the file to create the
plot. This does make the script go a little slower, but this also allows
you to get that moving domain.

I wasn't sure if you literally want a moving lat/lon domain for each plot,
or whether you wanted a fixed lat/lon domain for all plots, so hence the
two scripts.

The first one, wrf_dbz_mp_gsn_mods.ncl uses a moving domain, and the
wrf_dbz_mp_gsn_mods_fixed_map.ncl uses a fixed domain.

I created a series of PNGs from all timesteps across all files, and
converted the PNGs to both an animated GIF and an MPG file using
ImageMagick's convert utility:

  convert -delay 10 *.png refl_panel.mpg
  convert -delay 10 *.png refl_panel.
​gif​

I attached the two images from the last timestep on the last file.  The
animated GIF and MPG files are too large to attach here, but let me know if
you want me to send one of them to you in an email offline.  They are about
3-6 MB each.

The labelbar labels may be too large. You can adjust them with the
lbLabelFontHeightF resource that's in the code.

--Mary




On Wed, Feb 1, 2017 at 2:46 PM, Wang,Yu <wangyu8722 at ufl.edu> wrote:

> Dear Mary,
>
>
> Thank you so much for your help. I wondered if I could ask you another
> question. I have unmatching lat/lon on the left and right graphs(example
> attached) when I am using gsn_csm_xxxx to plot moving domains. What might
> be the problem for that?
>
>
> Best,
>
>
> Yu
>
>
> *From:* Mary Haley <haley at ucar.edu>
> *Sent:* Wednesday, February 1, 2017 2:35:17 PM
> *To:* Wang,Yu
> *Cc:* ncl-talk at ucar.edu
> *Subject:* Re: [ncl-talk] problem with background on moving domain
>
> Yu,
>
> I'm looking into this and am writing a version of your script that follows
> the domain of your lat/lon data.
>
> The basic issue is that each WRF output file has global attributes that
> define the map area of interest. This is a fixed area, that I assume is big
> enough to enclose the full boundary of your moving nest.
>
> When you use wrf_xxxx plotting routines, they set the map projections
> based on the WRF global attributes on the file, and not based on the
> individual lat/lon domain.
>
> Are you saying that you want the map to be redrawn such that the center of
> your storm is roughly in the center of the map? If so, then you probably
> don't want to use the wrf_xxxx routines for plotting.
>
> I'm creating a version of your code that uses gsn_csm_xxxx to do the
> plotting and will report back when it's done.
>
> --Mary
>
>
> On Wed, Feb 1, 2017 at 8:24 AM, Wang,Yu <wangyu8722 at ufl.edu> wrote:
>
>> Hello,
>>
>>
>> I am trying to make some dbz plots with multiple files of a moving
>> domain. The contour line  seems right and moving centered on the storm but
>> all the graphs that I created have exact same background which is not right
>> since my domain is a moving one. What should I do I am dealing with a
>> moving domain? Is there a certain function I should or should use? I have
>> attached my script, hope some one could give me some help.
>>
>>
>> Thank you so much for your help.
>>
>>
>> Best,
>>
>>
>> Yu
>>
>>
>>
>>
>> _______________________________________________
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>>
>>
>
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