[ncl-talk] how to plot air parcel trajectories from wrf output?

Mary Haley haley at ucar.edu
Thu Jul 24 09:27:54 MDT 2014

If you are talking about plotting markers on a map, then I would use
gsn_add_polymarker over a WRF map.  See the attached example, which uses
wrf_map_resources and gsn_csm_map to create a blank map using the map
projection specified on the WRF output file.

Then, some dummy lat/lon locations are generated and drawn as brown dots on
the map.

You can use any marker index in the marker index table:


Or you can create your own set of markers using NhlNewMarker. This allows
you to use any character in any of NCL's font tables as a marker. See:


If you want to do a really nice 3D plot of air trajectories, I suggest
looking into using Vapor.

You can see some samples at:



On Sat, Jul 19, 2014 at 8:15 PM, Li Qi <liqi123sh at qq.com> wrote:

> Dear all,
> I'd like to ask how to plot selected air parcel trajectories from WRF
> model output?
> _______________________________________________
> ncl-talk mailing list
> List instructions, subscriber options, unsubscribe:
> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.ucar.edu/pipermail/ncl-talk/attachments/20140724/9141de12/attachment.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: wrf_map.ncl
Type: application/octet-stream
Size: 943 bytes
Desc: not available
Url : http://mailman.ucar.edu/pipermail/ncl-talk/attachments/20140724/9141de12/attachment.obj 

More information about the ncl-talk mailing list