HYSPLIT Forum: hysplitbbs.arl.noaa.gov

Thanks for your help!! It is much appreciated!

Erik

In reviewing the readme file for the new WRF 27km meteorological data, I ran across some fields that I'm not familiar with. I looked at readme files for other types of archived data and at READY Meteorological Field Descriptions (https://www.ready.noaa.gov/READYflddesc.php) and could not find descri...

Mark,

Thanks very much for following up on this. It will be a big help!

Erik

I am wanting to use vmixing.exe to generate mixing heights and stability information for various locations for longish time periods. Based on posts elsewhere in "General questions on meteorological data needed for HYSPLIT" I have been able to generate this information for only a month at a time. I r...

Thanks Dr. Stunder! I checked the trajectory output files and there were only three files that had less than 120 hours (they had 119). The trajectory output files I used yesterday also included a number of meteorological parameters that included with the trajectory endpoints. On a whim, I decided to...

I have a set of 370 trajectories (each with a length of 120 hours) that I wish to cluster. I can get INFILE to form correctly, but when I try to run the cluster analysis I get the following error: "Not trajectories to cluster. Check trajectory duration in the files in INFILE and/or the Hours to clus...

NOAA Staff,

Thanks so much for all the work you do with HYSPLIT and for its users! Is there a general road map of where you see HYSPLIT going in the next few years? If so, could you share a general summary? Thanks!!

When building the data grid for my analysis, should I stay faithful to the original description in the NARR readme.txt file? Lambert Conformal Conic Projection Vert. Coordinate 2 Pole Lat. 90.00 Pole Lon. 0.00 Ref. Lat. 50.00 Ref. Lon. -107.00 Ref. Grid 32.46 Orientation 0.00 Cone Angle 50.00 Sync X...

HYSPLIT requires meteorological input data to be in a specific format: ARL packed. NOAA has archived ARL packed meteorological files for use in HYSPLIT on the following page: http://www.ready.noaa.gov/archives.php . Most of the model files archived on this page are for for North America and do not i...

When using HYSPLIT to generate trajectory statistics (i.e. frequency analyses), is there a general rule of thumb about selecting an appropriate grid resolution (e.g. 1.0 degree versus 0.25 or 0.5 degrees)? I typically use North American Regional Reanalysis files with the 32km grid size for my meteor...