Search found 163 matches

by alicec
February 28th, 2017, 3:45 pm
Forum: Conversion programs
Topic: Issue with GRIB data from new ECMWF data server?
Replies: 16
Views: 10077

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: 3534

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: 1258

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: 10077

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: 2759

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: 2759

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: 10077

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: 2759

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...
by alicec
May 3rd, 2016, 9:49 am
Forum: Dispersion Model
Topic: EMITIMES file
Replies: 7
Views: 3145

Re: EMITIMES file

To tell HYSPLIT to use the EMITIMES.txt file you need to put the following line in the SETUP.CFG file efile='EMITIMES.txt' So you can name your emitimes file anything you want; you just need to have this line in the SETUP.CFG file. In the CONTROL file you will need to have as many sources lines as y...
by alicec
April 27th, 2016, 1:42 pm
Forum: Dispersion Model
Topic: EMITIMES file
Replies: 7
Views: 3145

Re: EMITIMES file

No problem - It's because I chose my emission duration as 5 minutes - 1/12 of an hour. The duration of the emission is specified in the 6th column in format hhmm. Then the rate of release per hour is specified in the 10th column. This is a setup I often use for testing because it's easy to look in t...