Search found 87 matches

by alicec
October 16th, 2018, 11:06 am
Forum: Dispersion Model
Topic: GDAS 1 Degree vs 0.5 Degree
Replies: 5
Views: 1669

Re: GDAS 1 Degree vs 0.5 Degree

The ARL files can be concatenated.
On linux

cat file2.ARL > file1.ARL
by alicec
October 15th, 2018, 10:12 am
Forum: Dispersion Model
Topic: trajectories
Replies: 3
Views: 103

Re: trajectories

Yes, if you are using ichem=5 then you will have some problems keeping track
of the computational particles because some will be removed during deposition.
I any solution would involve modifying the code.
by alicec
October 10th, 2018, 4:15 pm
Forum: Users
Topic: Calculate trajectories of many sources
Replies: 1
Views: 77

Re: Calculate trajectories of many sources

Yes! you can script your HYSPLIT runs.
Please go through the tutorial. This part explains how you can access example scripts.
https://ready.arl.noaa.gov/documents/Tu ... batch.html

You should be able to find an example script that you can modify for your purposes.
by alicec
October 10th, 2018, 4:11 pm
Forum: Dispersion Model
Topic: trajectories
Replies: 3
Views: 103

Re: trajectories

Please see the answers to the previous questions. https://hysplitbbs.arl.noaa.gov/viewtopic.php?p=4410#p4410 https://hysplitbbs.arl.noaa.gov/viewtopic.php?f=28&t=1527&p=4412#p4412 I'm curious as to what people are intending to do with the path of the individual computational particles in the dispers...
by alicec
October 10th, 2018, 4:09 pm
Forum: Dispersion Model
Topic: Extract particle path (start/stop) information
Replies: 2
Views: 473

Re: Extract particle path (start/stop) information

Please note that this option to output initial positions in the pardump file was implemented in v972.
by alicec
October 10th, 2018, 3:18 pm
Forum: Dispersion Model
Topic: What is SORT-INDEX in the PARDUMP format?
Replies: 1
Views: 84

Re: What is SORT-INDEX in the PARDUMP format?

The sort index is used within HYSPLIT for looping through all the computational particles or puffs. It was not intended to be a unique identifier of computational particles. Computational particles: If a computational particle is removed during the simulation, the sort indices are reassigned so that...
by alicec
October 9th, 2018, 10:42 am
Forum: Dispersion Model
Topic: Extract particle path (start/stop) information
Replies: 2
Views: 473

Re: Extract particle path (start/stop) information

In July 2018 an option was added to output particle positions at the simulation start to the PARDUMP file. See: https://ready.arl.noaa.gov/hysplitusersguide/S627.htm NDUMP=0, NCYCL=+N Particle positions written at simulation start then again at 1*N, 2*N, 3*N NDUMP=0, NCYCL= -N Particle positions wri...
by alicec
October 3rd, 2018, 9:19 am
Forum: General questions on meteorological data needed for HYSPLIT
Topic: Need help with GDAS half-degree data
Replies: 4
Views: 445

Re: Need help with GDAS half-degree data

Try using WinSCP or similar application. File protocol= FTP Encryption = No encryption Host name: arlftp.arlhq.noaa.gov Check the box which says Anonymous login - that will fill in the User name and Password boxes. (see below) After you login, you should be able to drag the files from the ftp site t...
by alicec
October 1st, 2018, 10:21 am
Forum: General questions on meteorological data needed for HYSPLIT
Topic: Need help with GDAS half-degree data
Replies: 4
Views: 445

Re: Need help with GDAS half-degree data

Could you please provide more details on what occurs when you try to download the files?
by alicec
September 21st, 2018, 5:11 pm
Forum: Trajectory Model
Topic: Ending trajectories after reaching a 0 mts height.
Replies: 2
Views: 630

Re: Ending trajectories after reaching a 0 mts height.

There is not a way currently to automatically do this. If you need to, you may simply disregard the points in the trajectory after it reaches the ground. The tractory output files are ascii files. https://ready.arl.noaa.gov/hysplitusersguide/S263.htm There are good reasons NOT to end a trajectory on...