HYSPLIT Forum: hysplitbbs.arl.noaa.gov

If R has a function that is similar to the cat command in linux it should work.

Please try setting the timestep (delt) to a fix value (e.g. 5 or 1). The model is using different time steps when calculating the trajectories at different heights and that causes the observed discrepancies.

In the trajectory Display menu, click on Meters-agl (under the Vertical Coodinate:)

Wη = (-∂η/∂t - u ∂η/∂x - v ∂η/∂y) / (∂η/∂z)

Not exactly. The A parameter already includes the fraction of the area that is emitting. K and A are empirical parameters, they don't really have an absolute physical meaning.

The tutorial contains a zip archive for the CONUS (https://ready.arl.noaa.gov/documents/Tutorial/dust/dust_conus.zip) and globally of monthly files of threshold friction velocity and soil dust density for each AOD grid cell over the domain that exceeds the threshold. You can modify these values to m...

ASCDATA.CFG should be under the bdyfiles directory.

You are on to the correct approach to define a moving source by using the EMITIMES file. Although the help file S417.htm mentions that the file can be used to define a moving source, no specific instructions are provided. As an example, the EMITIMES file you provided has been modified to redefine th...

Please check chapter 13 of our workshop:
https://www.ready.noaa.gov/documents/Tu ... index.html

The daily trajectories should take only a few seconds. Something is not right in your computing system. Can you please share with us your CONTROL and SETUP.CFG files?