Sunday, June 3, 2012

4881.txt

cc: <jan.esper@wsl.ch>,"'Ulf Buentgen'" <buentgen@wsl.ch>, "'David Frank'" <david.frankatXYZxyz.ch>, "'Dietmar Wagenbach'" <Dietmar.Wagenbach@iup.uni-heidelberg.de>, <mzemp@geo.unizh.ch>, "'''Wolfgang Sch�ner' ''" <wolfgang.schoener@zamg.ac.at>, "'Kurt Nicolussi'" <kurt.nicolussiatXYZxyzk.ac.at>, "'Michael Grabner'" <michael.grabneratXYZxyzu.ac.at>, <k.briffa@uea.ac.uk>,"'Juerg Luterbacher'" < juerg@giub.unibe.ch>
date: Fri, 08 Jun 2007 16:50:34 +0100
from: Phil Jones <p.jonesatXYZxyz.ac.uk>
subject: Re: AW: a draft version of EI-corrected HISTALP temperatures
to: "Reinhard Boehm" <Reinhard.BoehmatXYZxyzg.ac.at>

Reinhard,
Thanks for this. I will have a look at this all over the weekend.
The final end product looks just like my hope - summers
were 0.5 deg C too warm and for winters it is negligible,
although it does make it very marginally ccoler.

Thanks also for the timetable for June. I will be able to do something in
August with the new series for the WP9 paper.
I'm sure I will have some questions after the weekend.
I have one now.
Geneva and Karlsruhe have the same obs times and both face N. Why
do their adjustments differ, then. Do you take into account mountains
that might obstruct the view early in the morning and in the evening?
Have a good weekend. I will enjoy looking at this, on another
wet and miserable weekend here.
Cheers
Phil
At 15:18 08/06/2007, Reinhard Boehm wrote:

Phil,

I have attached a short summary of what we did to produce the new version of
EI-corrected temperature series. I hope this makes things clearer and serves time.

As to your two questions:

1) I think the series will remain as they are most probably. There are only a few which
could be slightly changed if we received more station history information from DWD and
MeteoSwiss mainly (e.g. Bern and Stuttgart). But I think the provisional estimates are
quite usable already.
Inge has used the opportunity of an ECSN-meting two weeks ago to persuade Swiss and
German officials from the weather services to send some information about their
stations, but I am not too optimistic to receive anything.
Therefore we decided that I myself use my stay at an Italian conference next week at
Ischia to organise some still missing uptades (until 2006-12 I hope at least) which are
still missing from Italy. After that we will not wait any longer
and:

2) We will declare the series definite by mid June, merge them into the shorter
rest of the (non EI-) series and immediately calculate and send out the new EI-corrected
5 subregional mean series together with the new stationmode series and also the 1deg
lat-long-gridded anomaly series immediately (hopefully updated to 2006-12 for Italy and
to 2007-03 for the rest of the GAR).

So everybody can work with the new series by the end of June 2007 latest.

We will then also start to write a draft of the respective paper describing the
EI-corrections and we hope to produce a first version of our part and send it out for
discussion and for the input from the co-authors pretty soon.

Cheers


Reinhard

P.S. I send this also to the others, maybe it makes life easier also for them
___________________________________________________________________________________

Von: Phil Jones [[1] mailto:p.jones@uea.ac.uk]
Gesendet: Mittwoch, 06. Juni 2007 16:18
An: Reinhard Boehm
Betreff: Re: a draft version of EI-corrected HISTALP temperatures

Reinhard,
There is a lot to look at. Is it possible that you could select out
a few summary diagrams, for me to look at? The file seems so
large to look through.
As for timing:
1. When do you think you might have a draft of the paper? How long
is a piece of string? Will you wait to get more info from across
the region? Or maybe how long will you wait?
2. At some point you will be able to send me a series, or better
still the GAR and the 5 sub parts of the GAR, so I can resurrect
the paper I started which was supposed to result from WP9.
If I get the series relatively soon, I can do some work over the summer.
August is generally a quiet month!
Cheers
Phil
At 13:05 05/06/2007, you wrote:
Friends,

It took a while to produce the EI-corrected version of HISTALP-T01 and I missed the
deadline of May 31st which Maurizio, Phil and I decided at our meeting at the EGU in
Vienna. But at last we succeeded and can present now a new EI-corrected version of the
GAR-long series temperature dataset.
My excuse for the delay is that I underestimated the amount of not yet really and
systematically extracted metadata in our library and that I overestimated the input from
the national or regional data providers. We only received very good input about Torino
(Luca Mercalli), some infos from Michele and nothing at all from all the rest from
Swiss, German and other colleagues. Therefore we had to do the historic enquiry in fact
nearly all on ourselves (lots of dust has found its way from the old books in the
library into the lungs).

But the result was quite useful. We now have the necessary information (on the
orientation, height above ground, the measuring times, the calculation algorithms and
the screens) for the overwhelming majority of the longterm sites (see
EI-metadata-and-models.xls ). And we could apply the three Kremsm�nster-Models for
EI-biases we developed from the multi-year comparative measurements at the Kremsm�nster
historic and modern site. The few sites with unsatisfying metadata were provisionally
adjusted based on a-posteriori homogeneity tests. At this occasion we also detected some
non-EI-inhomogeneities and corrected them as well.

My opinion is that the status 2007-06-04 series can be regarded as definite in terms of
EI-corrections. I only hope to receive the few still missing updates to present all
series updated at least until 2006-12. This will be no problem concerning Switzerland,
hopefully also concerning France and I instantly hope that we can also include the
Italian temperatures in time (please Michele and Maurizio do what you can, for
temperature alone it should not be an unsolvable problem I hope.)

Please instrumental colleagues, have a close look at the results in the two files:

EI-corr-datasampler.xls provides all single station series in tree modes: only outlier
corrected, the old homogenised version of last year and the new EI-corrected version we
propose now.
To make life easier for you we have also produced some figures for regional and seasonal
mean series of the three mentioned datamodes in file EI-corr-regional-means.xls .

Please proxy-colleagues, use this mail as first information what the new series are
looking like. I think that the problems concerning the misfits with treering and glacier
data have become much smaller now and the great advantage: we did not use any proxy
information for correcting, we strictly remained within the instrumental realm.

As soon as your reviews come in, I will send out a new proposal for our common paper to
immediately start the writing process. Simultaneously we will merge the 32 early series
into the HISTALP temperature dataset, produce the 1-deg gridded series and thus replace
the old ALP-IMP-version.

I am looking forward to your replies

Best regards


Reinhard
Prof. Phil Jones
Climatic Research Unit Telephone +44 (0) 1603 592090
School of Environmental Sciences Fax +44 (0) 1603 507784
University of East Anglia
Norwich Email p.jonesatXYZxyz.ac.uk
NR4 7TJ
UK
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Prof. Phil Jones
Climatic Research Unit Telephone +44 (0) 1603 592090
School of Environmental Sciences Fax +44 (0) 1603 507784
University of East Anglia
Norwich Email p.jonesatXYZxyz.ac.uk
NR4 7TJ
UK
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