Initial HYSPLIT time step

Questions and postings pertaining to the development of HYSPLIT, feature enhancements, and HYSPLIT internals. HYSPLIT source code and algorithms are discussed here.
Post Reply
Posts: 1
Joined: August 10th, 2020, 2:36 pm
Registered HYSPLIT User: Yes

Initial HYSPLIT time step

Post by DanClayton »

Are there any plans on reducing the minimum time step to allow for shorter distance calculations? One example of the usefulness applies to one of my applications below.

I am calculating air concentrations and ground depositions. Some of the released particles are fairly large in size (> 1 cm), so they should deposit very quickly. Even though I initialize them at low heights (<1 m) with a PARINIT file, they still travel over the first time step (1 min), spreading those particles over ~0.25 km (depending on the wind speed) and diluting the calculated ground deposition values. Having a smaller initial time step would reduce this effect.
Posts: 284
Joined: February 8th, 2016, 12:56 pm
Registered HYSPLIT User: Yes

Re: Initial HYSPLIT time step

Post by alicec »

When a time step smaller than 1 minute is needed we would recommend use of the inline HYSPLIT. ... -coupling/
Post Reply

Return to “Developers”