Search found 432 matches
- March 28th, 2024, 10:38 am
- Forum: Users
- Topic: Default SETUP.CFG namelist file parameters
- Replies: 2
- Views: 29495
Re: Default SETUP.CFG namelist file parameters
MHRS, TOUT are only pertinent to the trajectory runs and have no meaning for a dispersion run. Therefore the defaults may be different - e.g. 0. KWET - Thanks for pointing out the discrepancy between the descriptions. There is an error in the Namelist variable section. https://www.ready.noaa.gov/hy...
- March 28th, 2024, 10:35 am
- Forum: Wildfire Smoke
- Topic: Data Inputs needed for Smoke Concentration
- Replies: 1
- Views: 156271
Re: Data Inputs needed for Smoke Concentration
You need emissions data. You can specify complex emissions scenarios using an EMIT-TIMES file. https://www.ready.noaa.gov/documents/Tutorial/html/cust_emit.html HYSPLIT currently has three plume-rise options (see PLRISE in SETUP.CFG and https://acp.copernicus.org/articles/23/3083/2023/) https://www....
- March 21st, 2024, 3:49 pm
- Forum: Wildfire Smoke
- Topic: Hysplit on R studio:
- Replies: 1
- Views: 356
Re: Hysplit on R studio:
Could you provide more information.
In particular it would be nice to see your CONTROL file for the run and also whether you are running
trajectory or dispersion. What is in the resulting table?
In particular it would be nice to see your CONTROL file for the run and also whether you are running
trajectory or dispersion. What is in the resulting table?
- March 21st, 2024, 3:45 pm
- Forum: Trajectory Model
- Topic: Backward trajectory for odour sources
- Replies: 1
- Views: 2022
Re: Backward trajectory for odour sources
The short answer is yes, it could be used that way. For most applications one of the keys is to make sure the meteorological data which provides the wind fields to HYSPLIT is appropriate for the question you are trying to answer. For your application, the HRRR with 3km horizontal resolution may work...
- March 21st, 2024, 12:18 pm
- Forum: General questions on meteorological data needed for HYSPLIT
- Topic: Running decades using ERA5 ?
- Replies: 1
- Views: 936
Re: Running decades using ERA5 ?
Was it the downloading time that was the problem? The conversion itself should be pretty fast. Unfortunately I'm not sure of how to solve the problem of long download times. I think there are various ways you can try to subset the data to make it faster. https://confluence.ecmwf.int/display/CKB/How+...
- March 21st, 2024, 12:04 pm
- Forum: HYSPLIT for PCs
- Topic: executing HYSPLIT parallel
- Replies: 1
- Views: 2006
Re: executing HYSPLIT parallel
There are a few things that can help with executing multiple hysplit runs at the same time. 1. you can name your CONTROL and SETUP.CFG files with a suffix - CONTROL.suffix1 SETUP.suffix1, CONTROL.suffix2 SETUP.suffix2. Then you call the hysplit executable with (example shell scrip) /hysplit/exec/hyt...
- March 21st, 2024, 11:46 am
- Forum: Dispersion Model
- Topic: Pollutant Concentration
- Replies: 1
- Views: 165
Re: Pollutant Concentration
There are a good number of ways HYSPLIT can be utilized to model air pollutants which depends on what question you are trying to answer, what data you have regarding measurements and emissions estimates and so forth. I suggest using a literature search tool such as web of science and searching for s...
- December 4th, 2023, 9:39 am
- Forum: Dispersion Model
- Topic: Extracting data at specific location
- Replies: 3
- Views: 77369
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: 46690
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: 69924
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 ...