[RegCNET] to validate the model

[Yan Zhang]

Dear All,
         To validate the model performance, I want to use the ICBC 
data.  What I used is NCEP NNRP2, but I found the ground temperature 
from RegCM3 could be 3 to 4 degree lower than that from NNRP2. I 
wonder if it is reliable using NNRP2 to evaluate the model, because i 
know the spacial resolution of NNRP2 is too coarse, like 2.5*2.5 degree?

          I really appreciate your help.

           Another question is if the newest version improved 
rainfall? I tried Emmanuel convective scheme over south 
American,  but rainfall does not show great improvement compared with 
observational data. Especially, the monthly mean convective rainfall 
spacial distribution looks unrealistic, although it looks very smooth 
comparing with simulation by using Grell scheme.
           I made a slight modification to the model, I got a really 
good results of sensible flux (SH) and latent flux (LH) including 
monthly mean and diurnal cycle, but such a big change of SH and LH 
doesn't influence rainfall much. I am interested dry season (Jun~Oct) 
over Amazonia where the convective rainfall dominant during the 
period. I expected LH would have a great influence to rainfall. But I 
never get the expected results.  I wonder if the rainfall scheme 
works out in the model.

           I did not plan to write too much, but I know this is the 
only place we can discuss RegCM3 together. I don't mean RegCM3 is not 
good enough.  I pointed out the problem, in case other one struggling 
to the same problem. I also wish if anyone would like to discuss it with me.

Best

Yan