Users • Running STILT Configuration Using User-Defined Meteorology
I encounter this error when attempting to run a simulation using user-defined meteorology:HYSPLIT - Initialization HYSPLIT version: hysplit.v5.2.3 Last Changed Date: 2022-08-09 NOTICE main: using...
View ArticleClik here to view.
Dispersion Model • several orders larger in depositions when ocean surface...
Dear HYSPLIT,I did simulations using GFS data to compare depositions with ocean surface transport being switched on and off (see the attached, left is off, right is on). The 2- to 3-order differences...
View ArticleConversion programs • Re: ERA5 data for HYSPLIT
Hi Tim,In order to convert the ERA5 data to the arl format you need 3 files: - A dataset from "ERA5 hourly data on pressure levels from 1940 to present". Stating it simply: this is the 3D data.- A...
View ArticleHYSPLIT for PCs • HYSPLIT PC – Exit Code 900 with GDAS and RP.gbl Files...
Dear All,I’m running HYSPLIT on Windows for trajectory analysis across six sites. I’ve developed an R-based automation script that generates CONTROL files and calls hyts_std.exe to run simulations...
View ArticleHYSPLIT for PCs • Re: Max file size for CLUSTER output file?
You’re likely hitting the 2 GB file size limit, common in Fortran-based programs like HYSPLIT’s cluster.exe. Many 32-bit or default-compiled Fortran binaries stop writing unformatted output once the...
View ArticleHYSPLIT for PCs • Re: HYSPLIT PC – Exit Code 900 with GDAS and RP.gbl Files...
The NCEP/NCAR reanalysis files (R*.gbl) are already in the ARL format and they are readily usable with HYSPLIT. No conversion is required. To diagnose the issue you reported, could you post SETUP.CFG,...
View ArticleTrajectory Model • Error in "Run Model"
Hello!I tried to run the Trajectory Model after completing the Trajectory Setup. I can successfully run "Run Sample". However, I have been waiting for nearly an hour after starting the run, but it...
View ArticleTrajectory Model • Re: Error in "Run Model"
For diagnosis, could you post your CONTROL, MESSAGE, and SETUP.CFG? If you are running HYSPLIT using a Windows PC and your HYSPLIT is installed at C:\hysplit, the files should be found in...
View ArticleBugs • When using STILT (ichem=8), cmass gets forced to 1 (mass) even when...
When using both HYSPLIT version 5.2.3 via the linux command line and the standard HYSPLIT GUI version 5.2.1 on a windows machine, the following was encountered when running backwards concentrations...
View ArticleClik here to view.
General questions on meteorological data needed for HYSPLIT • Question about...
Hello,I'm a PhD student conducting a study on backtracking air masses arriving at an atmospheric station. Specifically, I'm analyzing greenhouse gases such as CO₂, CH₄, H₂O vapor, and CO.I would like...
View ArticleDispersion Model • Re: several orders larger in depositions when ocean...
Interesting. This is probably because the computational particles deposited on the water surface are not undergoing dispersion, only advection by the mean winds. With no dispersion, dilution of the...
View ArticleConversion programs • ACCESS-G to ARL conversion
Hello All,The Australian Bureau of Meteorology has published the Australian Community Climate and Earth-System Simulator (ACCESS) dataset on the National Computational Infrastructure (NCI), which is...
View ArticleConversion programs • arw2arl has problem with polar projection and true...
Hello everyone!I'm trying to convert WRF output files to ARL format using arw2arl, but the conversion fails with the following error: ERROR: incorrectly defined polar projection in WRF! TRUELAT1 does...
View ArticleConversion programs • Re: arw2arl has problem with polar projection and true...
Hello,I was able to fix the error by manually setting TRUELAT2 equal to TRUELAT1 in the WRF output. After that, arw2arl worked fine. However, I’m not sure if this is the correct approach or if I...
View ArticleUsers • HYSPLIT not proceeding when using EMITIMES
I want to increase the number of emission points, using EMITIMES. While going through the documentation and following the instructions of the Workshop when using the example of the Volcano emission,...
View ArticleUsers • Re: Running STILT Configuration Using User-Defined Meteorology
Your CONTROL file is setup to write average concentrations every 0 hours to the cdump file, which can't be done. Change your CONTROL file to the following to write out average concentrations every 13...
View ArticleClik here to view.
Wildfire Smoke • Grid concentrations not what I expect
I'm simulating four fires emitting 15000 g/hr PM2.5 per hour, for 24 hours, starting 2024 30 00, and the particle plot (PARTPLOT) shows what I would expect. Particles being emitted for 24 hours,...
View ArticleUsers • Point of Contact for Usage/Result distribution questions?
I'd like to learn more about what is allowed in regards to the distribution and use of model results using the forecasted meteorological files. Is there a point of contact to discuss this with? Or...
View ArticleWildfire Smoke • Re: Grid concentrations not what I expect
Can you please post your CONTROL and SETUP files ?Statistics: Posted by Tianfeng.Chai — May 27th, 2025, 4:34 pm
View ArticleBugs • Re: When using STILT (ichem=8), cmass gets forced to 1 (mass) even...
Correct, HYSPLIT forces CMASS=1 when run with ICHEM=8. However, running with ICHEM=8, particles are still divided by the air density to output a mixing ratio output field.Statistics: Posted by...
View Article