>I've never done anything like this, but I will mention that moving the >thermometer >will result in slightly different temperatures than keeping it still - >think of >wind chill. > I may be wrong but I think the chilling factor has to do with the body loosing heat to try to maintain the surface temperature. The more wind the faster the surface is cooled down because there is more energy removed. The chilling factor affects living mechanisms that fight to keep the surface temperature. A body may need to send out 500 calories for a given static temperature or the same for a higher temperature but with wind, the wind conversion to the equivalent static temperature is the chilling factor. A thermometer will measure the temperature of the water moving since it does not have internal energy to supply to keep the surface temperature at a give value. The only temperature change might be due to heating by friction against the water which I think is so small that could be neglected. Therefore I think the reading should be very accurate of the average surface temperature which in a moving lake should take care of a couple or three feet depth, and is close to the temperature a capsized individual might feel in his face and body. As Mike says depending on the objective deeper measurements might be useful. I would be interested in teh close to surface temperatures anyway. Best Regards, Rafael Mier Maza mayanseas.com *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************Received on Fri Jul 05 2002 - 13:33:19 PDT
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