Hi

I am running a SW model but wave field data for calibration is not available. However I would expect that for a wind velocity of 20 m/s , over a 10 km fetch, Mike would calculate wave heights close to 1 -1.10 m, as calculated with the Jonswap method.  However, the results are in the order of 3 m.

If I run the uncoupled sea-air option with a Charnock coefficient of 0.004 ( way below the default), I may lower it down to 2.1 m. However, I am not sure if such a low value is realistic.

Has anyone come across a similar case?

Thanks