Saturday, June 2, 2012

4825.txt

cc: "Phil Jones" <p.jones@uea.ac.uk>,"Keith Briffa" <K.BriffaatXYZxyz.ac.uk>
date: Tue, 17 Mar 2009 09:21:40 +0000
from: Dimitrios Efthymiadis <d.efthymiadisatXYZxyz.ac.uk>
subject: Re: ENSEMBLES RT2B DMI-HIRHAM5 outliers
to: "Ole B�ssing Christensen" <obcatXYZxyz.dk>

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Dear Ole,

Thank you for your reply. I look forward to
receiving the reprocessed simulations. Meanwhile,
I could mention that there are also some other
minor issues with the units of the output fields.
For instance, Sunshine duration (sund) fields
looks to be expressed in hours/day (not in
seconds/day, as stated in the header of the
NetCDF file). In addition, although Precipitation
(pr) is expressed in kg m-2 s-1, Snowfall (prsn)
looks as to be expressed in kg m-2 hour-1. I will
come back with a detailed list of these minor
problems as soon as the DMI-HIRHAM5 fields
analysis being done at CRU is completed.

Best regards,

Dimitrios

At 08:36 17/03/2009, Ole B�ssing Christensen wrote:

>Dear Dimitrios,
>
>This is new to me and certainly very serious for our simulation. Thank you
>very much for diagnosing the problem and making us aware of it!
>
>To our luck, we are rerunning the simulation anyway, since we had to "patch"
>it up originally: In order to reach the deadline for data 1/1/09, the
>simulation had to be restarted wrt. soil water etc. some time around 2050 due
>to different errors discovered along the way. To fix this inconsistency, we
>have been redoing the simulation in a more proper continuous fashio, and we
>will update the archive when postprocessing has been completed. But we were
>certainly not aware of problems of the magnitude you have noticed!
>
>Greetings and thanks, Ole
>
>On Monday 16 March 2009 16:54, you wrote:
> > Dear Dr Christensen,
> >
> > I have been analyzing the DMI-HIRHAM5 model output fields (monthly
> > means) from the ENSEMBLES RT2B experiments and found some surface
> > field outliers for November and December 2050. These fields (tas,
> > tasmin, tasmax, rss, rls, hfso) exhibit excessively high values over
> > the whole model domain (~Europe). By checking the "Top downward SW
> > radiation" (rsdt), I realised that the solar forcing in November 2050
> > resembles a July-like situation, whereas the December 2050 solar
> > field is similar to what typically occurs in June. Are you aware of
> > this issue? Has the DKC modelling group tackled this problem? I would
> > appreciate if you could provide me some information on this case.
> > Thank you in advance.
> >
> > Best regards,
> >
> > Dimitrios
> > ......................................
> > Dr Dimitrios Efthymiadis
> > Climatic Research Unit
> > School of Environmental Sciences
> > University of East Anglia
> > Norwich, NR4 7TJ, UK
>
>--
>Ole B�ssing Christensen, senior scientist E-mail: obcatXYZxyz.dk
>Danish Climate Center Phone : (+45) 39 15 74 26
>Danish Meteorological Institute Fax: (+45) 39 15 74 60
>Lyngbyvej 100, DK-2100 Copenhagen �, Denmark
>Home page: http://glwww.dmi.dk/f+u/klima/klimasektion/obc.html

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