Why are the results different for the same run on the web versus the PC?

Post any questions or comments regarding the Desktop PC version of HYSPLIT. This includes the model execution, GUIs, results, or graphics. Be sure to include the operating system you are using (Windows XP, Windows Vista, Windows 7, Windows 8, etc.
Post Reply
sonny.zinn
Posts: 354
Joined: May 8th, 2019, 1:31 pm
Registered HYSPLIT User: Yes

Why are the results different for the same run on the web versus the PC?

Post by sonny.zinn »

[Note that the question and the answer below are recreated from a HYSPLIT FAQ site that predates this forum site. The original posting date is unknown.]

There are several possibilities for the differences you are seeing.
  • the version of HYSPLIT may be different….we test new updates to HYSPLIT on the web site before releasing them to the PC version,
  • the values we set in the SETUP.CFG and CONTROL files may be different than what you have set in yours,
  • finally, due to the random number generator, the dispersion will be very slightly different when running the same case on different computing platforms.
Glenn Rolph
Post Reply

Return to “HYSPLIT for PCs”