Search found 145 matches

by alicec
April 13th, 2017, 5:58 pm
Forum: Trajectory Model
Topic: Plotting meteorology data along a trajectory
Replies: 8
Views: 3069

Re: Plotting meteorology data along a trajectory

How are you doing the conversion currently?

Thanks,
Alice
by alicec
March 3rd, 2017, 10:59 am
Forum: General questions on meteorological data needed for HYSPLIT
Topic: Backward Daily Trajectory with ECMWF Error
Replies: 2
Views: 2275

Re: Backward Daily Trajectory with ECMWF Error

What ECMWF dataset are you using and how are you converting it to ARL format? If you are using ecmwf2arl lease make sure you have the latest version. Try running profile or chk_file on your meteorological file. What type of error messages are you getting when you run HYSPLIT? If you are using analys...
by alicec
February 28th, 2017, 3:45 pm
Forum: Conversion programs
Topic: Issue with GRIB data from new ECMWF data server?
Replies: 16
Views: 9194

Re: Issue with GRIB data from new ECMWF data server?

The ecmwf2arl converter has been updated so that it resolves the following issues: As noted, forecast fields for the interim data set are put in a separate file from analysis fields. TPPT as well as SHTF, DSWF, LTHF, PBLH, CAPE are all only available as forecast fields (precipitation 228.128, surfac...
by alicec
February 28th, 2017, 12:40 pm
Forum: Conversion programs
Topic: Convert IFS netCDF data to arl
Replies: 4
Views: 3262

Re: Convert IFS netCDF data to arl

There is a program that is distributed with HYSPLIT called ecmwf2arl which will convert ECMWF grib files to HYSPLIT ARL format. It was created to work with ERA-INTERIM files downloaded through the ECMWF API but I think it should work with your forecast data as well. Below are the fields that are nee...
by alicec
December 14th, 2016, 12:16 pm
Forum: Dispersion Model
Topic: Trajectory of volcanic ash
Replies: 1
Views: 1122

Re: Trajectory of volcanic ash

To trace the path of computational particles in a dispersion run you can look at the PARDUMP (particle dump) file. To see how to tell HYSPLIT to generate a particle dump file see the Users guide section Concentration / Particle / Display http://www.arl.noaa.gov/documents/reports/hysplit_user_guide.p...
by alicec
May 24th, 2016, 9:50 am
Forum: Conversion programs
Topic: Issue with GRIB data from new ECMWF data server?
Replies: 16
Views: 9194

Re: Issue with GRIB data from new ECMWF data server?

Ok good - I can reproduce this problem if I try to convert a large grib file (> 2GB).
You can make the grib files smaller by using shorter time periods or downloading less pressure levels.
You can concatenate the resulting ARL files if you need to.

Cheers,
Alice
by alicec
May 23rd, 2016, 4:16 pm
Forum: Users
Topic: running multiple trajectory in time and space
Replies: 4
Views: 2489

Re: running multiple trajectory in time and space

Also it is ok not to have the ZNT field for the trajectories. It is not used for the trajectory calculations.
Cheers,
Alice
by alicec
May 23rd, 2016, 12:07 pm
Forum: Users
Topic: running multiple trajectory in time and space
Replies: 4
Views: 2489

Re: running multiple trajectory in time and space

It is hard to recommend which way is better. I would recommend going through the entire tutorial on trajectory with the GUI and do the following: -look at the CONTROL and SETUP.CFG file generated for each example. -look at the bash and or batch scripts for each example and try to run them. -look at ...
by alicec
May 23rd, 2016, 10:32 am
Forum: Conversion programs
Topic: Issue with GRIB data from new ECMWF data server?
Replies: 16
Views: 9194

Re: Issue with GRIB data from new ECMWF data server?

Try converting the files in chunks smaller than a month and see if that works. How large are your input GRIB files? Also, could you please let me know how you retrieved the GRIB files so I can try to reproduce the problem. (What pressure levels were you retrieving, what surface fields...) Cheers, Al...
by alicec
May 20th, 2016, 11:18 am
Forum: Users
Topic: running multiple trajectory in time and space
Replies: 4
Views: 2489

Re: running multiple trajectory in time and space

You probably want to do this with some sort of scripting. You can find example scripts in examples/scripts/ folder. There are example batch scripts for windows and shell scripts for linux/unix. There are also bash and batch scripts for most of the tutorial in the Tutorial folder. Please see the tuto...