Search found 378 matches

by barbara.stunder
December 16th, 2019, 10:49 am
Forum: Trajectory Model
Topic: Eddy diffusion in back trajectory?
Replies: 3
Views: 932

Re: Eddy diffusion in back trajectory?

The Basic Tutorial explains the trajectory calculation. https://www.ready.noaa.gov/HYSPLIT_Tutorials.php It is advection only. Per the Tutorial, single trajectories have limitations, hence there are options for an ensemble, starting trajectories with time, etc. For a cloud, you would need to start b...
by barbara.stunder
December 16th, 2019, 10:41 am
Forum: HYSPLIT for PCs
Topic: Single Particle Animation Error
Replies: 6
Views: 1354

Re: Single Particle Animation Error

Are you saying you got the same error with both of the following in the "Set Directories"? convert.exe C:/Program Files/ImageMagick-7.0.8-Q16/convert.exe Try it again after exiting the GUI and restarting it, and make sure the Set Directories has the full path (C:/Program...). Did you verify the post...
by barbara.stunder
November 18th, 2019, 9:17 am
Forum: Dispersion Model
Topic: concentraton-vertical
Replies: 1
Views: 1288

Re: concentraton-vertical

There is not a program to output a vertical concentration section. You need to run HYSPLIT outputting concentration by layer. Then run con2asc or con2stn. Particle plots can show vertical cross-sections.
by barbara.stunder
November 18th, 2019, 9:12 am
Forum: HYSPLIT for PCs
Topic: Concentration Display in HYSPLIT4
Replies: 2
Views: 1253

Re: Concentration Display in HYSPLIT4

The plot failed. The "Concentration Display" window in the first line shows the input file is named "cdump". Does that file exist and is its size >0? If yes, then run the program through the GUI Concentration / Utilities / Simple Listing, choosing the file "cdump". That will show you information on ...
by barbara.stunder
November 4th, 2019, 3:23 pm
Forum: Users
Topic: How to set up HYSPLIT Modeling on PC for calculationg concentration of volcanic ash.
Replies: 2
Views: 1194

Re: How to set up HYSPLIT Modeling on PC for calculationg concentration of volcanic ash.

We don't know exactly what is in the ash, so approximations are made. In that GUI section, first do a run choosing Particle, and no wet, no dry deposition. Save the CONTROL file for reference. Then add dry deposition, which will give a value for the deposition velocity. Then add wet deposition.
by barbara.stunder
November 4th, 2019, 3:00 pm
Forum: Trajectory Model
Topic: trajectory frequency plotting contours
Replies: 6
Views: 4665

Re: trajectory frequency plotting contours

The map domain is defaulting to the whole plume, even though you are forcing the higher contour values. Have you tried the Google Earth option? concplot ... -a3 If you want concplot, run concplot.exe in the command prompt, and it will show all the options. Try the -h and -g options forcing 0 circles...
by barbara.stunder
October 28th, 2019, 9:42 am
Forum: Dispersion Model
Topic: grids
Replies: 1
Views: 1109

Re: grids

Please send your CONTROL and SETUP files for these runs, and the command line for the program that outputs your values shown.
by barbara.stunder
October 28th, 2019, 8:04 am
Forum: Trajectory Model
Topic: trajectory frequency plotting contours
Replies: 6
Views: 4665

Re: trajectory frequency plotting contours

Because it is working in the Execute Display in the GUI, you need to make sure all those options are set in the command line equivalent. Looking at the "Create a Trajectory Frequency Plot" GUI window (Trajectory - Display - Frequency), you need to click "Polar" and set the zoom. Those are the only o...
by barbara.stunder
October 15th, 2019, 12:38 pm
Forum: Bugs
Topic: Possible issue with NAM SPHU at model levels
Replies: 1
Views: 1348

Re: Possible issue with NAM SPHU at model levels

We are working on an operational fix, then will need to fix the archived files. This applies to all the "nams" files.
by barbara.stunder
October 8th, 2019, 7:26 am
Forum: Dispersion Model
Topic: Pollutant starting location(large area) matter
Replies: 1
Views: 1003

Re: Pollutant starting location(large area) matter

See the help file c:\hysplit4\html\S417.htm. Or through GUI, Advanced - File Edit - Emissions File.

See also the Dust sections of the Tutorial. https://www.ready.noaa.gov/HYSPLIT_Tutorials.php