When should I consider spin-up for WRF predictions?

[laurizio]

I created new LAI, Greenfrac and Land Cover products. I want to implement these new input parameters in WRF. But I'm in doubt about the spin-up time. My study wants to verify the impact of these new entries on short-term forecasts, up to 72 hours.

Can anyone give me a tip on this or point me to some articles to read?

Thanks!

 

[Ming Chen]

Usually 9-12 hours of spin-up time will be sufficient. Note that WRF is under strong constraints of lateral forcing and changes in surface static data could be more important for long-term climate simulation.