Search found 425 matches
- December 4th, 2023, 9:39 am
- Forum: Dispersion Model
- Topic: Extracting data at specific location
- Replies: 3
- Views: 68983
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...
- December 1st, 2023, 10:30 am
- Forum: Dispersion Model
- Topic: Utilizing Particle Size Characteristics
- Replies: 1
- Views: 41899
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...
- December 1st, 2023, 10:19 am
- Forum: Radiological
- Topic: emission rate (CONTROL) and EMITIMES file
- Replies: 1
- Views: 63702
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 ...
- December 1st, 2023, 10:15 am
- Forum: General questions on meteorological data needed for HYSPLIT
- Topic: ARL converted data issue
- Replies: 2
- Views: 49064
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?
What is the domain of your meteorological file? does it cover your starting point?
- December 1st, 2023, 10:12 am
- Forum: Dispersion Model
- Topic: Grid definition
- Replies: 1
- Views: 42218
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.
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.
- December 1st, 2023, 10:05 am
- Forum: Dispersion Model
- Topic: what is the unit of the mass mentioned in PARINIT/PARDUMP
- Replies: 1
- Views: 41426
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...
- November 30th, 2023, 9:58 am
- Forum: Dispersion Model
- Topic: Extracting data at specific location
- Replies: 3
- Views: 68983
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 ...
- October 5th, 2023, 7:24 am
- Forum: Users
- Topic: Guidance on multiple point sources with continuous processes
- Replies: 1
- Views: 46858
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...
- September 22nd, 2023, 9:58 am
- Forum: Dispersion Model
- Topic: create PARDUMP file using terminal
- Replies: 1
- Views: 41900
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...
- September 21st, 2023, 8:52 am
- Forum: HYSPLIT on the READY Server
- Topic: Vertical Velocity Options
- Replies: 2
- Views: 68265
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...