[RegCNET] 10 km run

[Torma Csaba]

Dear RegCM Users,

We just started to use RegCM3 driven by ERA40 2.5 degree resolution ICBC
data for a European subregion containing the Carpathian Basin and Hungary.

Our grid resolution is 10 km.

In the precipitation pattern we found big biases as compared to the CRU
data, especially during summer (convective events cause too much
precipitation). We tried to use both Emanuel and Grell convective schemes,
but the result was quite the same: the precipition was overestimated by
the model with a factor of about 2.

We suspect that the 10 km resolution causes this overestimation. Using 25
km grid resolution the result is much more realistic, but we would like to
use 10 km grid spacing. Is there any possible solution for this
overestimation? Any suggestion is welcome!

Thanks in advance.

Kind regards,
Csaba TORMA