Search found 27 matches

by egribbin
November 25th, 2020, 1:04 am
Forum: General questions on meteorological data needed for HYSPLIT
Topic: WRF 27km meteorological fields
Replies: 1
Views: 29

WRF 27km meteorological fields

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...
by egribbin
November 22nd, 2019, 7:30 pm
Forum: General questions on meteorological data needed for HYSPLIT
Topic: Mixing Height Information and Stability Plots
Replies: 3
Views: 2010

Re: Mixing Height Information and Stability Plots

Mark,

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

Erik
by egribbin
October 2nd, 2019, 5:27 pm
Forum: General questions on meteorological data needed for HYSPLIT
Topic: Mixing Height Information and Stability Plots
Replies: 3
Views: 2010

Mixing Height Information and Stability Plots

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...
by egribbin
October 12th, 2017, 3:52 pm
Forum: Cluster Analysis
Topic: HYSPLIT not wanting to run cluster.exe
Replies: 3
Views: 4392

Re: HYSPLIT not wanting to run cluster.exe

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...
by egribbin
October 11th, 2017, 7:55 pm
Forum: Cluster Analysis
Topic: HYSPLIT not wanting to run cluster.exe
Replies: 3
Views: 4392

HYSPLIT not wanting to run cluster.exe

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...
by egribbin
April 13th, 2017, 2:35 pm
Forum: General Comments
Topic: HYSPLIT Road Map
Replies: 1
Views: 4807

HYSPLIT Road Map

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!!
by egribbin
April 13th, 2017, 2:29 pm
Forum: Users
Topic: Appropriate grid resolution for trajectory statistics
Replies: 3
Views: 2444

A quick follow up question Re: Appropriate grid resolution for trajectory statistics

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...
by egribbin
February 8th, 2017, 5:42 pm
Forum: User Applications
Topic: Industrial accident simulation
Replies: 1
Views: 5555

Re: Industrial accident simulation

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...
by egribbin
December 6th, 2016, 7:05 pm
Forum: Users
Topic: Appropriate grid resolution for trajectory statistics
Replies: 3
Views: 2444

Appropriate grid resolution for trajectory statistics

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...
by egribbin
August 5th, 2015, 7:23 pm
Forum: Cluster Analysis
Topic: Problem getting trajectories clustered
Replies: 5
Views: 6224

Re: Problem getting trajectories clustered

Will do!

Thanks Barbara!

Erik Gribbin