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| Expansion equals increased temperature by Simon Keeling. | |
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| Tweet Topic Started: 30 Jun 2013, 12:36 PM (33 Views) | |
| Audi-Tek | 30 Jun 2013, 12:36 PM Post #1 |
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Is it really record breaking heat? Expansion equals increased temperature There is much talk this weekend of record-breaking temperatures in the USA. No doubt there will be lots of news reports that put these record-breaking temperatures down to global warming. However one has to be super careful when comparing records and take extra consideration of the changing the use of land that has taken place in the last 30 to 40 years. The expansion of towns, cities and airports means that temperatures naturally rise. If you increase the amount of tarmac and concrete in an area that heat gets absorbed and released, this increases temperatures and if you leave the weather station in the same location you will see an increase in temperature. That's not to say definitively that there isn't an underlying warming but one has to be careful when comparing records now to those made several decades ago. And bringing things closer to home the same factor applies in the UK and Europe. We need to look at the changing use of land and the expansion of populations when considering temperature rises at individual weather stations. So when you see press reports of this weekend's heat in the USA, ask yourself are we comparing like with like. Source ............ http://www.weatherweb.net/wxwebtvsimonnew.php?ID=785 |
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9:57 AM Jul 11