Wednesday, March 28, 2012


date: Tue Aug 3 14:54:50 2004
from: Phil Jones <>
subject: Fwd: Re: Corrections applied to monthly temperature averages

This is the other attachment that Reinhard is referring to. Probably not relevant.

From: "Reinhard Boehm" <>
To: "Phil Jones" <>
Subject: Re: Corrections applied to monthly temperature averages
Date: Mon, 2 Aug 2004 14:45:23 +0200
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Hi Phil,

Back from Utrecht and from a holiday stay in the Austrian mountains, I try to work off
all requests in my mailbox. Yours is among the older ones and I hope to be able send You
everything soon.
There is one thing that would help me: Could You please send me the list of stations
with the exact locations (I remember that in Austria for example there were some which
we adjusted from a HISTALP location to a CRU location, as for example Innsbruck from the
university site to the airport site). As I have lost the respective mails with Anders
Moberg that would explain everything, I need that information. The best thing would be
to receive from You a list of CRU-sites from the GAR plus the recent 10 years or so of
data and we wil immediately send You the respective HISTALP-data plus the changes we
have applied separated for ajusted breaks, for outliers and for completed values that
were missing in the original data.
To give You a first impression of the new HISTALP temperature release (which will be on
the ALP-IMP homepage within a few days) I have attached the accompanying readme-file.

There have been several smaller and some severe changes also concerning the Austrian
series we have sent to Anders last year, so I suggest to exchange the whole series in
Your dataset. One of the changes makes life easier for You for future updating: we have
recalculated all Austrian series from the 24-hourly means to the recent mean calculation
that is used also in the CLIMAT-telegrams (Tm = T7+T19+Tmin+Tmax)/4, the non Austrian
series have ben already according to their way of calculating the means (Tmax+Tmin)/2
for Italy for example...

Looking forward to Your reply


P.S.: Keith was telling me in Utrecht about "doing soon" the final language correction
of the IJC-precipitation draft. Could You be so kind to remind him of that? Thanks

----- Original Message -----
From: [1]Phil Jones
To: [2]Reinhard Boehm
Cc: [3] ; [4]Wolfgang Schoener
Sent: Monday, July 05, 2004 12:48 PM
Subject: Re: Corrections applied to monthly temperature averages
I know you're in Utrecht. The HISTALP file you mention sounds good. If we can get
that and the updated Austrian series we can add them to the CRU data base. Also
the adjustment factors will be useful as well. We are only looking at the homogeneity
adjustments and not the outlier numbers. An idea of the numbers of real outliers would
be a useful number though. I see you have sent that in the ALP-IMP email.
At 15:27 23/06/2004 +0200, Reinhard Boehm wrote:


Sorry for being late, but at the moment we are really busy with 90% mad administrative
rubbish. So the general answer for today is a clear YES. You will receive the Austrian
temperature series plus plus what has been adjusted within 2 weeks.
The reason why not immediately:
We are just finishing the final and systematic temperature outlier testing and removing.
hrough the much more systematic and intensive work we perform now versus the old version
we sent to Anders there are a number of new detected and removed outliers plus a
re-homogenisation (same breakpoints) but smoothed annual variation of adjustments
For the Vienna series we found a more reliable new original dataset for pre-1852

So we really propose to exchange once more the time series from 2 years ago versus the
new version of June/July 2004 we will send You as soon as theiy are ready

One last suggestion:
Why not using also some other series out of the new HISTALP-dataset. We have for each of
them a complete adjustment and outlier statistics, they will be updated until 2003-12
and we are convinced that the work we have invested into them has produced something of
a quite high quality level. (for example we have detected and removed some 2000 outliers
for the first 120 years we have treated so far, and some of them are among the absolute



P.S.: Is somebody of You present at Utrech this July? (Keith I suppose) I would be
pleased if we could have some short personal discussion about the next publications

----- Original Message -----
From: [5]Phil Jones
To: [6] ; [7]Reinhard Boehm
Sent: Wednesday, June 16, 2004 2:54 PM
Subject: Corrections applied to monthly temperature averages
Dear Lucie and Reinhard,
CRU will be doing some work soon with the Hadley Centre, which will eventually
lead to a new version of the CRU land and marine temperature dataset. In the last
which was described in Jones and Moberg (2003) we used your corrected/adjusted
temperature series for Canada and Austria you kindly sent us. This time, with the new
version (in addition to adding some more data we've received from elsewhere), we wish
to assess the errors more (following from the paper in J. Climate in 1997, Jones et
To achieve this, we want to incorporate the additional uncertainty of the
that have been applied. This is difficult, as some data we've received have probably
adjustments applied but we don't know when or by how much, then there are adjustments
we've applied in the mid-1980s (which we know about), then there are your adjustments.
To cut a long email short, we are hoping you will be able to send us files with
adjustments in. These need only be for the stations you've sent us in 2002 (for Canada
200+ and for Austria about 10). What we'd like is the monthly adjustment factors for
each change at each station and the period over which the adjustments apply. This could
be none for some stations. Do you have such a file - or can one be easily produced?
One final question, do you have information on the periods of overlap you used to
assess the adjustments. This might be for example, the exact periods used or a number
of years (e.g. 20) used as a sort of average overlap.
We hope to use this information as a guide to other parts of the developed world,
for Europe and Canada for North America and maybe Australia.
Thanks for any help you can give me.
PS I will be away from June 23 until July 7 inclusive as I'm moving house - just 2km,
but still
everything needs to be packed and then unpacked.
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

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

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

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