HYSPLIT Forum: hysplitbbs.arl.noaa.gov

The area is just used in the computation of the emission amount. The shape doesn't matter in 3D particle mode ... all releases are point sources.

In order for us to diagnose the problem we need the CONTROL and SETUP.CFG files and the MESSAGE file if available. If running this on the website, send us the Job ID.

The meteorological forecast data, which can be downloaded from NCEP at (for example, today): ftp://ftp.ncep.noaa.gov/pub/data/nccf/com/hysplit/prod/hysplit.20120826/ can range in size from 20 MB to 2.6GB depending on which data set you choose. PC HYSPLIT is updated a few times per year and it is sug...

Hello, Yes, it is a memory issue. We haven't used this cluster program on more than about 1000 trajectories. The limit will depend on your particular PC, but we don't have a simple way to calculate that limit. Try to reduce the number of trajectories and/or number of endpoints along the trajectory t...

It looks like you did not first download and install the Graphical Utilities programs. These programs are needed to be able to run the TCL scripts and display the graphics. You can download the utilities programs from the following location (you shouldn't need to reinstall HYSPLIT): http://www.ready...

The first thing we would recommend is that you go through the online training that we posted following our last PC HYSPLIT Workshop. You can find this information on the link for the June 2012 workshop at: http://www.arl.noaa.gov/HYSPLIT_workshop.php This training will instruct you on how to install...

Use the link to register for PC HYSPLIT and once you are registered send an email to arl.webmaster@noaa.gov requesting access to the Mac version. The link to the PC registered version is:

http://ready.arl.noaa.gov/HYSPLIT_register.php

Yes, the model vertical grid coordinate is terrain following, however, the terrain comes from the meteorological data set you are using and since you are using the coarse NCEP/NCAR Re-analysis data the resolution is only 2.5 degrees or about 275 km. Therefore, you will not be resolving much in the w...

HYSPLIT requires at a minimum, u,v,& w wind components,temperature,surface pressure, and height if on pressure surfaces in three dimensions (relative humidity or specific humidty are optional). You can find more information on the meteorological data in our workshop tutorials at: http://www.arl.noaa...

The meteorology files are written as direct access, so if you write a file with fewer time periods on top of a longer file, the additional records of the old file will remain. It is a feature rather than a bug permitting us to update individual records. However, as you point out, an automatic delete...