Search found 293 matches

by barbara.stunder
April 15th, 2019, 8:50 am
Forum: Users
Topic: Problem with emission location
Replies: 5
Views: 73

Re: Problem with emission location

The CONTROL file and the plot label both have 63.333. It looks about right on the plot.
by barbara.stunder
April 9th, 2019, 8:58 am
Forum: Trajectory Model
Topic: Hourly trajectory with 3-hour resolution GDAS
Replies: 1
Views: 61

Re: Hourly trajectory with 3-hour resolution GDAS

This question relates to the accuracy of the meteorology data and hence accuracy of trajectory. When a trajectory is calculated from one grid point at the time of the meteorology, and you are calculating the trajectory until the next meteorological time period, do you know the actual wind at every t...
by barbara.stunder
April 9th, 2019, 8:45 am
Forum: Users
Topic: dispersion model in water
Replies: 1
Views: 55

Re: dispersion model in water

HYSPLIT does not access oceanic data. I am not too familiar with NOAA's water models but a place to start may be the Global Real-Time Ocean Forecast System - https://polar.ncep.noaa.gov/global/
by barbara.stunder
April 9th, 2019, 8:32 am
Forum: Users
Topic: Problem with emission location
Replies: 5
Views: 73

Re: Problem with emission location

How far off is it? The graphic wasn't attached. Have you tried plotting with Google Earth instead?
by barbara.stunder
April 9th, 2019, 8:22 am
Forum: Users
Topic: dispersion from line source
Replies: 1
Views: 19

Re: dispersion from line source

A line source may be approximated using an emissions file. Please see the help file C:/hysplit4/html/S417.htm and the Tutorial section 16.5. https://ready.arl.noaa.gov/documents/Tutorial/html/index.html. Section 16.5 is about vertical line sources, but the application for horizontal is analogous. No...
by barbara.stunder
April 1st, 2019, 8:43 am
Forum: Users
Topic: GRIB2 to ARL with Eccodes
Replies: 4
Views: 151

Re: GRIB2 to ARL with Eccodes

Yes, hysplit was changed with repository version 911 to use ecCodes. The GFS 0.25 is 3-hourly. It contains the 0 and 3-hour forecasts from each cycle: 00z, 06z, 12z, and 18z, unless any of the cycles are missing, and then it contains only 00z cycle output. With the next HYSPLIT upgrade at NCEP, poss...
by barbara.stunder
April 1st, 2019, 8:32 am
Forum: HYSPLIT for PCs
Topic: Total accumulated mass
Replies: 1
Views: 72

Re: Total accumulated mass

That is correct, but did you check the units? Deposition is output as (emission mass unit)/m2. Grid resolution (CONTROL file) is degrees latitude and longitude.
by barbara.stunder
April 1st, 2019, 8:03 am
Forum: Dispersion Model
Topic: Ensemble-Meteorology + EMITTIMES file
Replies: 1
Views: 65

Re: Ensemble-Meteorology + EMITTIMES file

Are you running this ensemble? hycs_ens

If so, see the linux script ens_meteo.sh in the Tutorial section 13.1 (penguin icon at top of https://ready.arl.noaa.gov/documents/Tu ... meteo.html) and compare to your script. You can try running one of the ensembles with your EMITIMES file.
by barbara.stunder
March 18th, 2019, 8:35 am
Forum: Users
Topic: How can I check if the top of the model domain?
Replies: 2
Views: 126

Re: How can I check if the top of the model domain?

Your calculation is correct. Check the MESSAGE file for a NOTICE about "extrapolation from level". Generally you don't want that.
by barbara.stunder
March 18th, 2019, 8:06 am
Forum: Dispersion Model
Topic: Use own meteorological and gas concentration data
Replies: 2
Views: 79

Re: Use own meteorological and gas concentration data

Yes to all. Please see the Tutorial about the meteorology, which needs to be in a certain format.
https://www.ready.noaa.gov/HYSPLIT_Tutorials.php
I assume you mean the gas emission rate, rather than concentration.