Search found 356 matches

by barbara.stunder
August 5th, 2019, 10:32 am
Forum: Users
Topic: Source Term Geometry
Replies: 3
Views: 1851

Re: Source Term Geometry

No to your second question. See viewtopic.php?f=28&t=1496#p4914
by barbara.stunder
August 5th, 2019, 10:29 am
Forum: Dispersion Model
Topic: PARINIT vs. EMITIMES
Replies: 7
Views: 2590

Re: PARINIT vs. EMITIMES

There does not need to be a release given in the CONTROL file for the model to be initialized by the particles in the PARINIT file as long as the time of the particle position is during the run. See the description of NINIT at https://www.ready.noaa.gov/hysplitusersguide/S627.htm
by barbara.stunder
July 24th, 2019, 10:47 am
Forum: Dispersion Model
Topic: Message File
Replies: 3
Views: 840

Re: Message File

No.
by barbara.stunder
July 22nd, 2019, 7:54 am
Forum: Dispersion Model
Topic: Message File
Replies: 3
Views: 840

Re: Message File

In the CONTROL file you specify the particle size and mass emission rate.
See C:/hysplit4/html/S311.htm and the Pollutant and Deposition links.
by barbara.stunder
July 19th, 2019, 8:31 am
Forum: Users
Topic: GDAS terrain height?
Replies: 3
Views: 1058

Re: GDAS terrain height?

All the fields in a HYSPLIT meteorology file are on the same grid, so yes, the GDAS1 terrain height is at 1 degree resolution. There is no finer resolution. The NCEP/NCAR reanalysis archive does not have terrain height, so HYSPLIT uses the surface pressure, which is in the file, to estimate the heig...
by barbara.stunder
July 17th, 2019, 9:01 am
Forum: HYSPLIT Workshop
Topic: Automatic download
Replies: 3
Views: 1009

Re: Automatic download

It is possible to automatically run trajectories for a long time period using the "Run Daily" trajectory feature in the PC/Mac GUI after you download hysplit-compatible meteorology for the time period. See Section 6.1 Frequency Analysis in the Tutorial - https://ready.arl.noaa.gov/HYSPLIT_Tutorials....
by barbara.stunder
July 2nd, 2019, 8:55 am
Forum: Dispersion Model
Topic: Thin Plume
Replies: 3
Views: 671

Re: Thin Plume

I meant that the Pasquill stability class is not input to the HYSPLIT dispersion model. You are entering the Pasquill stability, along with meteorology observations to create a gridded meteorology file for input to the HYSPLIT dispersion model. Then with that meteorology, getting the thin plume. The...
by barbara.stunder
July 1st, 2019, 8:15 am
Forum: Dispersion Model
Topic: Thin Plume
Replies: 3
Views: 671

Re: Thin Plume

Where/how are you running HYSPLIT, and with what meteorology? The Pasquil stability is not an input to HYSPLIT.
by barbara.stunder
July 1st, 2019, 8:10 am
Forum: Users
Topic: Simulation over Airport and using QGIS
Replies: 1
Views: 778

Re: Simulation over Airport and using QGIS

1. See a description of HYSPLIT limitations at https://www.ready.noaa.gov/hypub/limitations.html 2. The HYSPLIT package does not include a program to plot vertical cross-sections of concentration. 3. Is the figure in QGIS different from the same plot in postscript/gif/pdf? Did you choose 'polygons' ...