Search found 16 matches

by khartig
July 22nd, 2021, 1:10 pm
Forum: Developers
Topic: Output new meteo variables along trajectory
Replies: 1
Views: 35915

Output new meteo variables along trajectory

I'm modifying the Linux source code to output the U and V wind components as diagnostic variables along a trajectory using the setup flags tm_uwnd and tm_vwnd. The meteo data I'm using is from CESM, on a lat/lon grid in m/s. I have the trajectory output file successfully producing a new column for e...
by khartig
July 16th, 2021, 12:54 pm
Forum: Developers
Topic: Changing internal vertical resolution
Replies: 1
Views: 15008

Re: Changing internal vertical resolution

Answered in an email exchange, in case anyone else wants to know: If you have the source code, modify library/hysplit/metlvl.f to set new values for AA, BB, and CC (I used AA=7.5, BB=2.5, CC=0 to double the vertical resolution). You will also need to set NLVL to determine the number of internal sigm...
by khartig
July 7th, 2021, 4:09 pm
Forum: Developers
Topic: Changing internal vertical resolution
Replies: 1
Views: 15008

Changing internal vertical resolution

I use HYSPLIT's trajectory model with data on hybrid sigma-pressure levels from CESM/CAM5. The input data I provide has 30 vertical levels, but comparing vertical profiles of, for example, temperature produced by HYSPLIT to those on the native vertical coordinate system, the HYSPLIT resolution seems...
by khartig
June 24th, 2021, 6:52 pm
Forum: General questions on meteorological data needed for HYSPLIT
Topic: Choosing variables to include - are some "better"?
Replies: 0
Views: 1699

Choosing variables to include - are some "better"?

When you're working with data from a simulation and have many options for variables to include, are some better than others? I am working with CESM/CAM output data on hybrid levels, converted to ARL format with MeteoInfo (and hopefully soon cesm2arl) and run through the trajectory model. The bare mi...
by khartig
March 22nd, 2021, 3:05 pm
Forum: Developers
Topic: Unable to reproduce interpolation onto trajectory
Replies: 0
Views: 16998

Unable to reproduce interpolation onto trajectory

I am working with CESM/CAM output data on hybrid levels, converted to ARL format with MeteoInfo (and hopefully soon cesm2arl) and run through the trajectory model. Ultimately I would like to take the trajectory location output (time/lat/lon/height or pressure) and use it to reference other variables...
by khartig
February 25th, 2021, 5:18 pm
Forum: Trajectory Model
Topic: Strange output when hitting the ground
Replies: 3
Views: 5276

Re: Strange output when hitting the ground

Thanks for the suggestions, I think I figured it out. I'm working with CESM/CAM data, and for a while I provided the 10-m zonal wind U10 but not the meridional wind V10. I have since discovered that the 'U10' variable provided in CAM4 is actually the total 10-m wind speed, not the zonal velocity, an...
by khartig
December 12th, 2020, 4:59 pm
Forum: General questions on meteorological data needed for HYSPLIT
Topic: Error 23 when spanning 31 Dec 0039 to 01 Jan 0040
Replies: 6
Views: 4842

Re: Error 23 when spanning 31 Dec 0039 to 01 Jan 0040

cesm2arl relies on a Makefile.inc that wasn't included in the tarball and doesn't seem to come with the version of HYSPLIT that is currently available on the website. Do you have a sample Makefile.inc that I could take and modify? I'm not familiar enough with compiling Fortran to figure out which va...
by khartig
November 10th, 2020, 10:38 am
Forum: General questions on meteorological data needed for HYSPLIT
Topic: Error 23 when spanning 31 Dec 0039 to 01 Jan 0040
Replies: 6
Views: 4842

Re: Error 23 when spanning 31 Dec 0039 to 01 Jan 0040

Thanks for the suggestions! Manual adjustment of the year sounded like it would work, but I wanted to make sure there weren't any deeper problems I was missing. And great to hear the next update will include a converter for CESM files, definitely looking forward to using that.
by khartig
November 5th, 2020, 5:04 pm
Forum: General questions on meteorological data needed for HYSPLIT
Topic: Error 23 when spanning 31 Dec 0039 to 01 Jan 0040
Replies: 6
Views: 4842

Re: Error 23 when spanning 31 Dec 0039 to 01 Jan 0040

I re-ran the conversion and didn't get any errors from MeteoInfo. I made two more files per your suggestion, one for 31 Dec 00:00:00 through 21:00:00 and one for 01 Jan 00:00:00 through 21:00:00 (output every 3 hours), and chk_file worked fine for each of them individually. I made another file with ...
by khartig
November 3rd, 2020, 3:56 pm
Forum: General questions on meteorological data needed for HYSPLIT
Topic: Error 23 when spanning 31 Dec 0039 to 01 Jan 0040
Replies: 6
Views: 4842

Error 23 when spanning 31 Dec 0039 to 01 Jan 0040

I run HYSPLIT using output from the CAM component of CESM, converted into ARL-friendly format with MeteoInfo. 99% of my data files, which have output every 3 hours for up to ten days, can be read by HYSPLIT with no problem, but if I try to run the trajectory model or the Check File program on a file...

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