WRF and IEVA and adaptive time-stepping

[julianrvogel]

Dear WRF community,

I want to use the IEVA time-stepping scheme together with the adaptive time-stepping feature in WRF-ARW. Could you please let me know if this works together?

In my first tests it seems to run fine, but I am not sure if the IEVA was meant to be running together with adaptive time-stepping. The IEVA outputs the initial time step at the beginning and indicates that it calculates some parameters from this. So, if these parameters are not updated every time-step, they might not adjust to the adaptive time step.

Best Regards,
Julian

 

[Ming Chen]

Julian,
Theoretically I believe the two options should be able to work together. Note that when IEVA is turned on, the small time step still depends on time_step (specified in namelist.input).

 

[Ming Chen]

And if time_step is adjusted ( in the case with adaptive_time_step on), then dts will change accordingiy.
( dts = grid%dt/float(num_sound_steps))

 

[julianrvogel]

Great, thanks a lot for the quick response! I will test some more but so far it works great.