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by alicec
December 4th, 2023, 9:39 am
Forum: Dispersion Model
Topic: Extracting data at specific location
Replies: 3
Views: 69144

Re: Extracting data at specific location

A couple thoughts 1. You release particles at 70m and are defining 10m vertical resolution on your concentration grid. To get non-zero concentrations in the first level, the material will need to mix downward to the first level. How quickly this happens depends on the meteorological conditions. So i...
by alicec
December 1st, 2023, 10:30 am
Forum: Dispersion Model
Topic: Utilizing Particle Size Characteristics
Replies: 1
Views: 41988

Re: Utilizing Particle Size Characteristics

Hello! You can define different 'species' in HYSPLIT. Each species (pollutant) has it's own emission rate, emission duration, release start time, https://www.ready.noaa.gov/hysplitusersguide/S312.htm Each one also has it's own deposition and gravitational settling parameters https://www.ready.noaa.g...
by alicec
December 1st, 2023, 10:19 am
Forum: Radiological
Topic: emission rate (CONTROL) and EMITIMES file
Replies: 1
Views: 63834

Re: emission rate (CONTROL) and EMITIMES file

Yes, if you are using an emit-times file then we recommend setting the emission rates in the CONTROL file to 0. If you are getting no concentrations then your emit-times file either isn't being read or isn't setup properly. If you look at the message file, you should see a line which indicates that ...
by alicec
December 1st, 2023, 10:15 am
Forum: General questions on meteorological data needed for HYSPLIT
Topic: ARL converted data issue
Replies: 2
Views: 49155

Re: ARL converted data issue

the message is saying that your starting point is not within the domain of your meteorological file.
What is the domain of your meteorological file? does it cover your starting point?
by alicec
December 1st, 2023, 10:12 am
Forum: Dispersion Model
Topic: Grid definition
Replies: 1
Views: 42293

Re: Grid definition

It would help to see your CONTROL file.
From your error message it looks like you are setting the model top to 1 and not 1000, which is below your release height of 100m.
https://www.ready.noaa.gov/hysplitusersguide/S310.htm
Please attach or copy your CONTROL file if you continue to have problems.
by alicec
December 1st, 2023, 10:05 am
Forum: Dispersion Model
Topic: what is the unit of the mass mentioned in PARINIT/PARDUMP
Replies: 1
Views: 41509

Re: what is the unit of the mass mentioned in PARINIT/PARDUMP

The mass unit is user specified when the emission rate is set. See the user guide. 12(2)- Emission rate (per hour) Default: 1.0 Mass units released each hour. Units are arbitrary except when specific chemical transformation subroutines are associated with the calculation. Output air concentration un...
by alicec
November 30th, 2023, 9:58 am
Forum: Dispersion Model
Topic: Extracting data at specific location
Replies: 3
Views: 69144

Re: Extracting data at specific location

Can you make sure that the concentrations aren't zero for the location you are specifying? One thing in particular to look at is the height index to make sure you are extracting concentrations at the correct height. Look at how you set up the vertical levels and make sure that you are trying to get ...
by alicec
October 5th, 2023, 7:24 am
Forum: Users
Topic: Guidance on multiple point sources with continuous processes
Replies: 1
Views: 46945

Re: Guidance on multiple point sources with continuous processes

When transitioning from using the GUI to using scripting the following may help you. For scripting, the main flow of work is. 1. write the CONTROL file 2. if using write the SETUP.CFG file. 3. if using write the EMITIMES file 4. call the hysplit executable you are using (hycs_std for dispersion, hyt...
by alicec
September 22nd, 2023, 9:58 am
Forum: Dispersion Model
Topic: create PARDUMP file using terminal
Replies: 1
Views: 41975

Re: create PARDUMP file using terminal

If you click the penguin at the top of the tutorial page it will download a bash script that will write the control, setup and emitimes file. Here is the part for writing the setup file. echo "&SETUP " >SETUP.CFG echo "initd = 0, " >>SETUP.CFG echo "numpar = 15000, " >>SETUP.CFG echo "maxpar = 20000...
by alicec
September 21st, 2023, 8:52 am
Forum: HYSPLIT on the READY Server
Topic: Vertical Velocity Options
Replies: 2
Views: 68434

Re: Vertical Velocity Options

These publications may give you some additional context for the different vertical velocity options. As vertical velocity is now widely available from the meteorological models, this is the option that is utilized for most applications. https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/95JD037...

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