HYSPLIT Forum: hysplitbbs.arl.noaa.gov

If you run with multiple levels defined in your concentration grid then the con2asc output will have multiple columns. It looks like you currently have one particle species defined (TEST) and the 05000 indicates that is concentration from ground to 5000m. If you defined another level (maybe 6000m) t...

ARL does not create this dataset.
https://www.ready.noaa.gov/gbl_reanalysis.php
You may want to contact NCEP/NCAR with any concerns.
https://psl.noaa.gov/data/gridded/data.ncep.reanalysis.html

You should use ninit=2 because you don’t want to remove particles that were added previously. ----------------------------------------------------------------------------------------- Example. You want to emit 100 g of mass over 1 hour at a constant rate. Set the model time step to 5 minutes (DELT=5...

You may find this technical report by Richard Dare useful. It explains the calculation of the terminal fall velocity of the particles in detail. https://cawcr.gov.au/technical-reports/CTR_079.pdf Here is a relevant section of the HYSPLIT user manual. You may also wish to consult the reference here. ...

Can you attach the MESSAGE file from the HYSPLIT run?
Thank you.

Do the outputs from the dispersion model contain details of the concentrations at different heights, or just one value for the averaged concentration up to a certain height? As I understand from looking at the plots produced by the model it should be the latter, but the former is what I require, th...

Description of the pardump/parinit file is here.
https://www.ready.noaa.gov/hysplitusersguide/S442.htm

There is python code with a class that can read/write pardump files here in pardump.py.
https://github.com/noaa-oar-arl/monetio ... tio/models

Which reanalysis are you looking for? It may be under "archive". Otherwise you can download the files from our ftp server. https://www.ready.noaa.gov/READYmetdata.php You can find some instructions here. https://hysplitbbs.arl.noaa.gov/viewtopic.php?f=25&t=1526&p=4402&hilit=winscp#p4402 https://hysp...

I'm not sure I understand the question. HYSPLIT will create/emit new computational particles at every time step during the emission time period. When the emission routine is called at each time step, it distributes the new particles over the specified area by adding a randomly chosen displacement to...

You may be running into terrain with the 3km HRRR at the 100m height
See this section of the tutorial.
https://www.ready.noaa.gov/documents/Tu ... _isob.html