Friday, December 30, 2011

1252090220.txt

From: Ian Harris <i.harris@uea.ac.uk>
To: t.osborn@uea.ac.uk
Subject: Re: Hopefully fixed TMP
Date: Fri, 4 Sep 2009 14:50:20 +0100

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Hi Tim

I've re-run with the same database used for the previous 2006 run
(tmp.0705101334.dtb).

/cru/cruts/version_3_0/update_top/gridded_finals/data/data.0909041051/
tmp/cru_ts_3_00.1901.2008.tmp.dat.nc.gz

Is that any better? If not please can you send the traditional multi-
page country plots for me to pore over?

Cheers

Harry


On 3 Sep 2009, at 17:04, Tim Osborn wrote:

> Hi Harry and Phil,
>
> the mean level of the "updated-to-2008" CRU TS 3.0 now looks good,
> matching closely with the 1961-1990 means of the earlier CRU TS 3.0
> and
> CRU TS 2.1.
>
> Please see the attached PDF of country mean time series, comparing
> last-year's CRU TS 3.0 (black, up to 2005) with the most-recent CRU
> TS 3.0
> (pink, up to 2008).
>
> Latest version matches last-year's version well for the most part, and
> where differences do occur I can't say that the new version is any
> worse
> than last-year's version (some may be better).
>
> One exception is the hot JJA in Europe in 2003. This is less
> extreme in
> the latest version. See attached PNG for a blow-up of France in JJA.
>
> I'm sure some people will use CRU TS 3.0 to look at 2003 in Europe,
> so we
> need to be happy with the version we release.
>
> Perhaps some hot stations have been dropped as outliers (more than 3
> standard deviations from the mean?)?
>
> But I'm not sure if that is the reason, since outlier checking was
> already
> used in last-year's version, wasn't it?
>
> Does the outlier checking always check +-3 SD from 61-90 mean (or
> normal),
> or does it check +-3 SD from the local mean (30-years centred on the
> value) which would allow for a gradual warming in both mean and
> outlier
> threshold?
>
> Cheers
>
> Tim
>
> On Wed, September 2, 2009 6:08 pm, Ian Harris wrote:
>> Tim
>>
>> When you have the time and/or the inclination, please can you run the
>> new TMP output through your IDL thingummajig?
>>
>> /cru/cruts/version_3_0/update_top/gridded_finals/data/data.
>> 0909021348/
>> tmp/cru_ts_3_00.1901.2008.tmp.dat.nc.gz
>>
>> Please let me know if you can't access it. I do appreciate your help!
>>
>> Cheers
>>
>> Harry
>
> --
> Dr. Tim Osborn
> RCUK Academic Fellow
> Climatic Research Unit
> School of Environmental Sciences
> University of East Anglia
> Norwich NR4 7TJ, UK
> www.cru.uea.ac.uk/~timo/

Ian "Harry" Harris
Climatic Research Unit
School of Environmental Sciences
University of East Anglia
Norwich NR4 7TJ
United Kingdom


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