Posted by Toby Inkster on 01/31/86 11:45

bobbrown1951@hotmail.com wrote:

> Have you wandered when its minus ten outside in march how scientists
> say its 3 degrees aove normal.

Well, I assume they look up a chart that tells them that the average
temperature at this time of year during the period 1850-1870 was X;
then calculate the average temperature for this time of year over, say,
1986-2006 and call that Y, then calculate the difference Y-X.

This is because one particularly cold day, with a temperature of minus
ten is hardly a reliable indicator of long-term global weather patterns.

--
Toby A Inkster BSc (Hons) ARCS
Contact Me ~ http://tobyinkster.co.uk/contact

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