Dear RegCMers, I tried some simulations using ReGCM3 with ERA40 and with EH50M data, but after the postprocessing step, I had some doubt about Tmin and Tmax values, because when I make a diurnal averaging I get more realistic values than when making daily continuous averaging. and the difference is really important! so what should I do please? I get Tmin and Tmax from the 8 averaged values of diurnal file? Thanks for help Sassi