Yep! Except that what was measured was the time it took for freezing to
take place. There were no actual heat loss measurements, though those
were considered in the theoretical calculations in the background to the
research, apparently. Essentially, NWS operates from a "look-up" table,
though there are some fitted equations available.
If I get a chance during this break, I'll try to post a short "review"
on the list -- providing there is interest in this matter.
Jim
Gregory Peterson wrote:
>
> I once asked Environment Canada for the formula so I could calculate the equivalent
>temperature.
> The instead sent me a small program that does it for me and a note saying that they
>are coming up with a new system to calculate windchill since (if memory serves me
>right) it was originally determined by measuring the heat loss in buckets of water in
>the Antarctic.
>
> That's all I know.
>
> greg
>
> >>> "kilopascal" <[EMAIL PROTECTED]> 2000-12-19 08:19:03 >>>
> 2000-12-19
>
> Did anyone see the Monday, 2000-12-18 issue of the Wall Street Journal? The
> front page article entitled: "First Santa Claus, Now The Wind chill Is
> Called Into Question". Scientists look for a New Index Everybody Can
> Believe In; The One We Use Is Wrong
>
> The article was written by Mark Robichaux, Staff Reporter.
>
> It gives the history of how wind chill was first determined. Talks about
> how it is done in Canada and other countries. But, only mentions that
> Canada uses Watts per square metre as a measure of heat loss. The US uses
> equivalent temperatures. Either methods are in error because the formula
> for doing the calculation is in error.
>
> There is suppose to be a world-wide effort to come up with a new index. The
> new method will be announced in Geneva early next fall. The article says
> nothing of what units the new method would use. If I were to guess, the
> watt per square metre would continue, but the calculation method would be
> improved.
>
> But, something tells me the Americans will mess it all up by trying to find
> an FFU equivalence.
>
> Has anyone else heard anything more on this subject?
>
> John
>
> Keiner ist hoffnungsloser versklavt als derjenige, der irrt�mlich glaubt
> frei zu sein.
>
> There are none more hopelessly enslaved then those who falsely believe they
> are free!
>
> Johann Wolfgang von Goethe (1749-1832)
--
Metric Methods(SM) "Don't be late to metricate!"
James R. Frysinger, CAMS http://www.metricmethods.com/
10 Captiva Row e-mail: [EMAIL PROTECTED]
Charleston, SC 29407 phone/FAX: 843.225.6789
