suitable spin up

[Salifou@]

I'm studying a case study linked to a rainfall extreme using WRF-ARW. I'm running a 10-day simulation (12-22 June 2018, target days 18-19 June 218) forced with ERA5 data. However, I would like to know how many days should I use to spin up.
Thanks,
Ibrahim

 

[kwerner]

Hi,
We typically recommend about 12 hours for spin-up.

 

[htan2013]

For precipitation, 24-48 hr spin-up is also recommended by some studies.

 

[Salifou@]

Hi,
Thanks so much for reply. Please which mode (WRF-ARW or NMM) is recommended in this particular case?
In fact, the idea behind this study is to analyse the dynamic associated and the predictability of the event (5 to 1 day before).

 

[kwerner]

Hi,
WRF-NMM has not been developed or supported for several years now. Our group supports WRF-ARW, so that is the version we would recommend.

 

[mariela_i]

Hi,
We typically recommend about 12 hours for spin-up.

If the simulation time of my interest is about a day, should the spin-up time also be 12 hours?

 

[Salifou@]

Hi,
WRF-NMM has not been developed or supported for several years now. Our group supports WRF-ARW, so that is the version we would recommend.

Hi,
Thanks for your reply. Can you take a look on my domain of simulation? I will appreciate to have your comments. D1 = 15km; D2 = 3km and D3 = 1km.

 

[kwerner]

If the simulation time of my interest is about a day, should the spin-up time also be 12 hours?

Yes, that is still standard.

 

[kwerner]

Can you take a look on my domain of simulation? I will appreciate to have your comments. D1 = 15km; D2 = 3km and D3 = 1km.

Hi, Since the original post here was about spin up time, and that was answered, will you please open a new thread to ask a new question? It helps to keep the forum organized and easier to read if the threads are specific to each topic. Thanks!