[RegCNET] underestimated diurnal temperature range montly means?

[Matteo Zampieri]

Hi All,

I'm using RegCM over Europe, I'm doing an hindcast for year 1994
using a similar configuration of the Practice Run but with a wider
area and using ERA40 as boundary conditions (domain.param is attached)

I think that the model diurnal temporal range, computed as TAMAX-TAMIN
from the SFR file after montly means are computed, is underestimated.

I'm attaching two plots showing the mean diurnal temporal range for
january and august. In January, in Central Europe, it is only 1 K

Maybe a possible reason could be that tamax and tamin are computed from
the 4-hourly model output but I don't think it is enough to explain
this behaviour

thank you very much to anyone can help me!

bests,
Matteo

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Matteo Zampieri
ISAC-CNR
Strada Prov. Lecce-Monteroni km 1.2
73100 LECCE (IT)
email: M.Zampieri at isac.cnr.it - @lmd.ens.fr
Tel: +39 0832 29 7105 - Fax: +39 0832 29 7547
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