date: Thu, 10 Sep 2009 10:48:47 +0100
from: Ian Harris <i.harris@uea.ac.uk>
subject: Re: cruts
to: t.osborn@uea.ac.uk

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Hi Tim,

On 10 Sep 2009, at 10:01, Tim Osborn wrote:

> Thanks.  see Q below...
>
> On Thu, September 10, 2009 9:57 am, Ian Harris wrote:
>> I would add that I'm still investigating. It looks like a database
>> difference, here are the French mean, min, max:
>>
>> For 0909041051, original db:
>>      2003       6   16.13    6.90   20.60
>>      2003       7   18.58    9.40   23.80
>>      2003       8   18.25    8.90   23.80
>>
>> For 0909021348, latest db:
>>      2003       6   19.12    8.50   23.60
>>      2003       7   20.61   12.20   26.70
>>      2003       8   21.04   11.90   26.60
>
> What are these?  Values for an individual station?  Is it odd that  
> mean is
> not equal to the average of min and max?  Or does France not  
> operate on
> the convention that Tmean = 0.5*(Tmin+Tmax), and instead do  
> something like
> Tmean = average of 6-hourly or hourly obs?

Sorry - didn't mean to confuse things. This is part of the output  
from my 'retrace' program. The mean is the spatial mean of all the  
cells in the country, but the min and max are for the highest and  
lowest cell (I deleted the coordinates that are also output).

Cheers

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


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