[Terrapreta] Ice-age anyone?

[Kevin Chisholm]

Dear Greg



Greg and April wrote:
> Are they?
>   
There would seem to be a rational basis for questioning the credibility 
of the reported data.

> < shrug >
>
> How accurate were the instruments that made the measurements?
>
> I wouldn't trust anything made prior to WW2 for anything other than a 
> general guide and that is hardly what scientific findings should be based 
> on.    For all practical purposes only the last 60-70 yrs have instruments 
> been sensitive enough ( in mass quantities ) to consider the readings to be 
> reliable, and even then there still have been readings from instruments with 
> a 5* F scale from 15-20 ft away at the closest ( and that is assuming that 
> the person doing the job actually went outside and just didn't fudge the 
> reports to stay inside ).
>   
The Stevenson Screen  Weather station has been in use for more than 100 
years. Mercury Thermometers are quite accurate. However, when the 
Stevenson Screens were originally designed, they called for Whitewash as 
the paint. Changing to latex paint changes the temperature response of 
the Stevenson station. The circumstances surrounding the stations can 
change over time. Some can be placed in very bad locations.



See: http://www.surfacestations.org/ to find out all about Weather 
Stations and their locations.
>
> In order to be credible, all the instruments used would have to have the 
> same accuracy and precision - if not, then you can be anywhere on the grid 
> and not know it.
>   

This site suggests manipulation of some weather data...
http://www.climateaudit.org/?p=2991#more-2991

The devil is in the details.

Best wishes,

Kevin


>
> Greg H.
>
>
> ----- Original Message ----- 
> From: "Doug Clayton" <dnclayton at wildblue.net>
> To: "Kevin Chisholm" <kchisholm at ca.inter.net>
> Cc: "'terra pretta group'" <terrapreta at bioenergylists.org>
> Sent: Saturday, April 26, 2008 13:22
> Subject: Re: [Terrapreta] Ice-age anyone?
>
>
>   
>> The "credible measurements" are in.  That's why the GW majority (not
>> just on this list) is a little freaked out. 
>>     
>
>
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>   

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